{"title":"RF Transmitters \u0026 Receivers","description":"","products":[{"product_id":"linear-act-22b","title":"Linear ACT-22B: 3-Channel Block Coded Key Ring Transmitter","description":"\u003ch1\u003eThe Linear Model ACT-22B 3-Channel Block Coded Key Ring Transmitter is designed for use with Linear’s access control products.\u003c\/h1\u003e\n\u003cp\u003eThe ACT-22B is a three-channel device. Pressing the transmitter’s left or right front button sends channel one or two. Pressing both buttons sends channel three. Lithium batteries with a five-year service life are included and the transmitter is supplied with a quick-disconnect key ring. A unique 10-second time-out feature prevents the system from being shut down by a single transmitter transmitting continuously.\u003c\/p\u003e\n\u003cp\u003eThe transmitter is MegaCode format, which means each transmitter is factory preprogrammed with one of over 1,000,000 codes, virtually eliminating the possibility of code duplication. Because the receiver ”learns” each specific code, no unauthorized person can gain access to the system by reprogramming a transmitter.\u003c\/p\u003e\n\u003cp\u003eBlock coded transmitters are factory programmed to a sequential series of transmitter ID codes. When used with a Linear access controller, transmitters can be locally or remotely programmed into memory by entering the first and last codes of the block into the system. Facility codes can be selected to further customize the system.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213035385137,"sku":"ACT-22B","price":280.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_ACT-22B_29412f81-3ccd-44f1-9f68-65d2977870c2.jpg?v=1720569720"},{"product_id":"linear-d-2r","title":"Linear D-2R: 2-Channel Receiver","description":"\u003ch1\u003eThe Linear model D-2R 2-Channel Receiver is designed for use in security systems and remote switching functions requiring more than one wireless zone or output\u003c\/h1\u003e\n\u003cp\u003eUsing one multi-channel receiver instead of several single-channel receivers enables the installer to cut installation costs and improve system performance by eliminating RF interference problems present in multiple-receiver installations.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eThe Linear Model D-2R is compatible with standard digital transmitters only.\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe outputs of the D-2R receiver are isolated dry relay contacts. Dry contacts indicate that the switching contacts are isolated from the receiver’s power supply. The receiver provides normally open and normally closed contacts for each channel. The current rating of each relay output is 1 amp at 32 volts maximum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOperates on 11-24 VDC or 12-16 VAC power\u003c\/li\u003e\n\u003cli\u003eCurrent consumption: 15 mA standby, 60 mA operating\u003c\/li\u003e\n\u003cli\u003eTwo independent channels\u003c\/li\u003e\n\u003cli\u003eStandard digital format: 64 discrete codes\u003c\/li\u003e\n\u003cli\u003eTwo form “C” relay outputs\u003c\/li\u003e\n\u003cli\u003eOne Amp contact rating @ 32 Volts AC\/DC\u003c\/li\u003e\n\u003cli\u003eRF frequency: 303.875 MHz\u003c\/li\u003e\n\u003cli\u003e4.9″ W x 4.2″ H x 1.3″ D\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213035417905,"sku":"D-2R","price":1270.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_D-2R_98f00484-1cc4-4ee2-b1bc-a5ea07e2a46a.jpg?v=1720569717"},{"product_id":"linear-d-4r","title":"Linear D-4R: 4-Channel Receiver","description":"\u003ch1\u003eThe Linear model D-4R 4-Channel Receiver is designed for use in security systems and remote switching functions requiring more than one wireless zone or output.\u003c\/h1\u003e\n\u003cp\u003eUsing one multi-channel receiver instead of several single-channel receivers enables the installer to cut installation costs and improve system performance by eliminating RF interference problems present in multiple-receiver installations.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eThe Linear Model D-4R is compatible with standard digital transmitters only.\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe outputs of the D-4R receiver are isolated dry relay contacts. Dry contacts indicate that the switching contacts are isolated from the receiver’s power supply. The receiver provides normally open and normally closed contacts for each channel. The current rating of each relay output is 1 amp at 32 volts maximum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOperates on 11-24 VDC or 12-16 VAC power\u003c\/li\u003e\n\u003cli\u003eCurrent consumption: 15 mA standby, 60 mA operating\u003c\/li\u003e\n\u003cli\u003eFour independent channels\u003c\/li\u003e\n\u003cli\u003eStandard digital format: 64 discrete codes\u003c\/li\u003e\n\u003cli\u003eFour form “C” relay outputs\u003c\/li\u003e\n\u003cli\u003eOne Amp contact rating @ 32 Volts AC\/DC\u003c\/li\u003e\n\u003cli\u003eRF frequency: 303.875 MHz\u003c\/li\u003e\n\u003cli\u003e9″ W x 4.2″ H x 1.3″ D\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213035483441,"sku":"D-4R","price":1545.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_D-4R_0f9579cb-ab39-4486-9b5c-bb41426a71fe.jpg?v=1720569714"},{"product_id":"linear-d67","title":"Linear D-67: 1-Channel Receiver","description":"\u003ch1\u003eThe LInear model D-67 1-Channel Receiver is designed for use in security systems and remote switching functions. Typical applications for the receiver include adding a wireless zone, a panic button, or creating a remote arm\/disarm feature for a hardwired alarm panel.\u003c\/h1\u003e\n\u003cp\u003eEach time a transmitter is triggered with a digital code matching the receiver’s digital code, the receiver’s relay will activate for four seconds.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eThe Linear model D-67 is compatible with standard digital transmitters only.\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe output of the D-67 receiver is isolated dry relay contacts. Dry contacts indicate that the switching contacts are isolated from the receiver’s power supply. The receiver provides normally open and normally closed contacts. The current rating of the relay output is 1 amp at 32 volts maximum.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eOperates on 11-24 VDC or 12-16 VAC power\u003c\/li\u003e\n\u003cli\u003eOne channel\u003c\/li\u003e\n\u003cli\u003eStandard digital format: 256 discrete codes\u003c\/li\u003e\n\u003cli\u003eOne form “C” relay output\u003c\/li\u003e\n\u003cli\u003eOne Amp contact rating @ 32 Volts AC\/DC\u003c\/li\u003e\n\u003cli\u003eFour second relay activation time\u003c\/li\u003e\n\u003cli\u003eRF frequency: 303.875 MHz\u003c\/li\u003e\n\u003cli\u003e4.9″ W x 3.8″ H x 1.3″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036040497,"sku":"D67","price":795.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_D-67_e5d62cc4-aaa0-4ce5-aca2-8b2f23a18b14.jpg?v=1720569712"},{"product_id":"linear-dt","title":"Linear DT: 1-Channel Visor Transmitter","description":"\u003ch1\u003e\u003cspan\u003eThe Linear model DT features a one-button, one-channel, 9-volt battery powered visor transmitter with removable visor clip and 256 selectable codes.\u003c\/span\u003e\u003c\/h1\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036106033,"sku":"DT","price":210.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DT_d729fe5f-d0ed-4383-9923-a7d9a09155c1.jpg?v=1720569709"},{"product_id":"linear-dxr-701","title":"Linear DXR-701: 1-Channel Receiver","description":"\u003ch1\u003eThe Linear model DXR-701 is a digital receiver with an isolated relay output designed for use with Linear’s DX Format transmitters that can be used in a variety of remote control applications.\u003c\/h1\u003e\n\u003cp\u003eWhen the receiver detects a signal from a transmitter programmed into its memory, the relay output activates. The relay has four optional output configurations.\u003c\/p\u003e\n\u003cp\u003eIn a typical installation, the receiver is connected to an alarm control panel, door strike, camera, high current relay or some other device. A transmitter is used to activate or control the device. The receiver should be mounted with the supplied mounting bracket indoors or outdoors inside a weather resistant non-metallic housing.\u003c\/p\u003e\n\u003cp\u003eThe digital DX code format features over a million possible codes. The DX transmitters are precoded at the factory to unique codes, so no field coding is required. Receivers must be programmed to the transmitter’s code before system testing and operation. Up to 32 transmitters can be programmed into the receiver’s memory. The memory is retained, even without power.\u003c\/p\u003e\n\u003cp\u003eThe unit can be powered from a 11-17 VDC or 12-16 VAC power source. The relay’s normally open and normally closed contacts can switch up to 1 amp at 24 volts AC\/DC.\u003c\/p\u003e\n\u003cp\u003eCutting jumpers select how the relay activates. The factory setting causes the relay to engage for four seconds each activation. Optionally, the relay can be set to engage for one second, toggle on with one activation then off with the next, or latch engaged until reset by pressing the program button.\u003c\/p\u003e\n\u003cp\u003eA nine-inch wire lead serves as the receiver’s antenna. The red program indicator lights during RF reception. The installer can verify that signals are being sent from transmitters and diagnose interference problems by viewing the indicator. The indicator also lights during memory programming\/erasing and flashes to count the number of transmitters in memory.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32 transmitter capacity\u003c\/li\u003e\n\u003cli\u003eRF activity indicator\u003c\/li\u003e\n\u003cli\u003eQuick-learn programming\u003c\/li\u003e\n\u003cli\u003eOperates on 11-17 VDC or 12-16 VAC power\u003c\/li\u003e\n\u003cli\u003eOne channel\u003c\/li\u003e\n\u003cli\u003eDX format\u003c\/li\u003e\n\u003cli\u003eOne form “C” relay output\u003c\/li\u003e\n\u003cli\u003eOne Amp contact rating @ 24 Volts AC\/DC\u003c\/li\u003e\n\u003cli\u003eSelectable relay activation time\u003c\/li\u003e\n\u003cli\u003eCurrent consumption: 25 mA standby, 60 mA operating @ 12 VDC\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e5.5″ W x 4.0″ H x 1.25″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036138801,"sku":"DXR-701","price":755.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXR-701_163559b7-8486-4a8c-8492-a4070c41791a.jpg?v=1720569707"},{"product_id":"linear-dxr-702","title":"Linear DXR-702: 2-Channel Receiver","description":"\u003ch1\u003eThe Linear model DXR-702 is a two-channel digital receiver with two isolated relay outputs designed for use with Linear’s DX Format transmitters that can be used in a variety of remote control applications.\u003c\/h1\u003e\n\u003cp\u003eWhen the receiver detects a signal from a transmitter programmed into its memory, the appropriate relay output activates. The relays have four optional output configurations. When the relays are set to latch, the receiver outputs will follow the open\/close door status sent from DXT-31 door\/window transmitters.\u003c\/p\u003e\n\u003cp\u003eIn a typical installation, the receiver is connected to an alarm control panel, door strike, camera, high current relay or some other devices. Transmitters are used to activate or control the devices. The receiver should be mounted with the supplied mounting bracket indoors or outdoors inside a weather resistant non-metallic housing.\u003c\/p\u003e\n\u003cp\u003eThe digital DX code format features over a million possible codes. The DX transmitters are precoded at the factory to unique codes, so no field coding is required. For versatility, any transmitter can be programmed into any receiver channel. Receivers must be programmed to the transmitter’s code before system testing and operation. Up to 32 transmitters maximum can be programmed into the receiver. The transmitters can be split in any number between the two receiver channels.\u003c\/p\u003e\n\u003cp\u003eReceiver channel two is a special channel. If channel two memory is empty, with no transmitters programmed into it, it will report low battery signals from any channel one transmitters capable of sending them. When a low battery transmission is received, the channel two relay will latch, regardless of how the option jumpers are set. The relay will remain engaged until the channel two program button is pressed. The low transmitter batteries should be replaced before resetting the relay.\u003c\/p\u003e\n\u003cp\u003eThe unit can be powered from a 11-17 VDC or 12-16 VAC power source. The relays’ normally open and normally closed contacts can switch up to 1 amp at 24 volts AC\/DC.\u003c\/p\u003e\n\u003cp\u003eCutting jumpers select how the relays activate. Four settings are possible. Both relays will function with the same option. The factory setting causes the relays to engage for four seconds each activation. Optionally, the relays can be set to engage for one second, toggle on with one activation then off with the next, or latch engaged for door status or until reset by pressing the program button.\u003c\/p\u003e\n\u003cp\u003eA nine-inch wire whip antenna screws into the receiver’s antenna connector. Optionally, a remote antenna (Model EXA-1000) can be connected to the receiver for greater radio range. The red program indicator lights during RF reception. The installer can verify that signals are being sent from transmitters and diagnose interference problems by viewing the indicator. The indicator also lights during memory programming\/erasing and flashes to count the number of transmitters in memory.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32 transmitter capacity\u003c\/li\u003e\n\u003cli\u003eRF activity indicator\u003c\/li\u003e\n\u003cli\u003eQuick-learn programming\u003c\/li\u003e\n\u003cli\u003eOperates on 11-17 VDC or 12-16 VAC power\u003c\/li\u003e\n\u003cli\u003eTwo channels\u003c\/li\u003e\n\u003cli\u003eLow transmitter battery reporting\u003c\/li\u003e\n\u003cli\u003eDX format\u003c\/li\u003e\n\u003cli\u003eTwo form “C” relay outputs\u003c\/li\u003e\n\u003cli\u003eOne Amp contact rating @ 24 Volts AC\/DC\u003c\/li\u003e\n\u003cli\u003eSelectable relay activation time\u003c\/li\u003e\n\u003cli\u003eCurrent consumption: 25 mA standby, 90 mA operating @ 12 VDC\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e5.5″ W x 4.0″ H x 1.25″ D\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036171569,"sku":"DXR-702","price":895.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXR-702_9eed6a69-c02b-4bc8-a2ac-53595f67fb44.jpg?v=1720569704"},{"product_id":"linear-dxs-21","title":"Linear DXS-21: Supervised 2-Button, 1-Channel Handheld Transmitter","description":"\u003ch1\u003eThe Linear model DXS-21 Supervised 2-Button, 1-Channel Handheld Transmitter is a supervised, digitally coded radio transmitter designed for use with Linear’s DX and DXS Format receivers.\u003c\/h1\u003e\n\u003cp\u003ePressing a button on the transmitter sends a digitally coded wireless signal to its companion receiver. To send a complete signal, press the transmitter button for a minimum of 2 seconds. The top button can be hidden with the top button cover supplied.\u003c\/p\u003e\n\u003cp\u003eThe DXS-21 is a two-button, one code transmitter. Pressing either the round button on the transmitter’s front, or the small button on the transmitter’s top will send the same signal.\u003c\/p\u003e\n\u003cp\u003eThe digital DXS code format features over a million possible codes. The DXS transmitters are precoded at the factory to unique codes, so no field coding is required and can send a signal for up to 10 seconds per activation.\u003c\/p\u003e\n\u003cp\u003eThe DXS-21 is supervised for low battery and sends hourly status reports. Some receivers are able to use these signals, others are not. Receivers must be programmed to the transmitter code before system testing and operation. Refer to the receiver’s instructions for details on operation and programming.\u003c\/p\u003e\n\u003cp\u003eEach DXS-21 is powered by two self-contained type 2032 3-volt lithium batteries (included). When the batteries voltage gets low, a low battery report is sent with any alarm or status report to notify the receiver. The red LED will blink when the transmitter is activated with low batteries.\u003c\/p\u003e\n\u003cp\u003eA removable pocket clip and belt clip are provided for each transmitter. Either can be attached to the back of the transmitter allowing the unit to be clipped to shirt pocket or slid onto a belt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete RF supervision\u003c\/li\u003e\n\u003cli\u003eAlarm, supervisory, and low battery transmissions\u003c\/li\u003e\n\u003cli\u003eUnique “Extra” top button\u003c\/li\u003e\n\u003cli\u003eHigh visibility operate LED\u003c\/li\u003e\n\u003cli\u003eTwo type 2032 lithium batteries supplied\u003c\/li\u003e\n\u003cli\u003ePocket and belt clip supplied\u003c\/li\u003e\n\u003cli\u003eDXS format\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e1.6″ W x 4.2″ H x 0.8″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036204337,"sku":"DXS-21","price":560.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXS-21_00572ec9-d880-475f-87c2-6f949a9d4265.jpg?v=1720569700"},{"product_id":"linear-dxs-23","title":"Linear DXS-23: Supervised 3-Button, 4-Channel Handheld Transmitter","description":"\u003ch1\u003eThe Linear model DXS-23 Supervised 3-Button, 4-Channel Handheld Transmitter is a supervised, digitally coded radio transmitter designed for use with Linear’s DX and DXS Format receivers.\u003c\/h1\u003e\n\u003cp\u003ePressing a button on the transmitter sends a digitally coded wireless signal to its companion receiver. To send a complete signal, press the transmitter button for a minimum of 2 seconds. The top button can be hidden with the top button cover supplied.\u003c\/p\u003e\n\u003cp\u003eThe DXS-23 is a three-button, four-code transmitter. Pressing either of the transmitter’s front buttons sends codes one and two. Pressing the small button on the transmitter’s top sends code three. Pressing both front buttons together sends code four.\u003c\/p\u003e\n\u003cp\u003eThe digital DXS code format features over a million possible codes. The DXS transmitters are precoded at the factory to unique codes, so no field coding is required and can send a signal for up to 10 seconds per activation.\u003c\/p\u003e\n\u003cp\u003eThe DXS-23 is supervised for low battery and sends hourly status reports. Some receivers are able to use these signals, others are not. Receivers must be programmed to the transmitter code before system testing and operation. Refer to the receiver’s instructions for details on operation and programming.\u003c\/p\u003e\n\u003cp\u003eEach DXS-23 is powered by two self-contained type 2032 3-volt lithium batteries (included). When the batteries voltage gets low, a low battery report is sent with any alarm or status report to notify the receiver. The red LED will blink when the transmitter is activated with low batteries.\u003c\/p\u003e\n\u003cp\u003eA removable pocket clip and belt clip are provided for each transmitter. Either can be attached to the back of the transmitter allowing the unit to be clipped to shirt pocket or slid onto a belt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete RF supervision\u003c\/li\u003e\n\u003cli\u003eAlarm, supervisory, and low battery transmissions\u003c\/li\u003e\n\u003cli\u003eUnique “Extra” top button\u003c\/li\u003e\n\u003cli\u003eHigh visibility operate LED\u003c\/li\u003e\n\u003cli\u003eTwo type 2032 lithium batteries supplied\u003c\/li\u003e\n\u003cli\u003ePocket and belt clip supplied\u003c\/li\u003e\n\u003cli\u003eDXS format\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e1.6″ W x 4.2″ H x 0.8″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036269873,"sku":"DXS-23","price":555.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXS-23_bf258626-2104-41d0-9c15-bac44ddb59bc.jpg?v=1720569697"},{"product_id":"linear-dxs-25","title":"Linear DXS-25: Supervised 5-Button, 8-Channel Handheld Transmitter","description":"\u003ch1\u003eThe Linear model DXS-25 Supervised 5-Button, 8-Channel Handheld Transmitter is a supervised, digitally coded radio transmitter designed for use with Linear’s DX and DXS Format receivers.\u003c\/h1\u003e\n\u003cp\u003ePressing a button on the transmitter sends a digitally coded wireless signal to its companion receiver. To send a complete signal, press the transmitter button for a minimum of 2 seconds. The top button can be hidden with the top button cover supplied.\u003c\/p\u003e\n\u003cp\u003eThe DXS-25 is a five-button, eight-code transmitter. Pressing any of the transmitter’s front buttons sends codes one through four. Holding down the small button on the transmitter’s top together with pushing with any of the front buttons sends codes five through eight.\u003c\/p\u003e\n\u003cp\u003eThe digital DXS code format features over a million possible codes. The DXS transmitters are precoded at the factory to unique codes, so no field coding is required and can send a signal for up to 10 seconds per activation.\u003c\/p\u003e\n\u003cp\u003eThe DXS-25 is supervised for low battery and sends hourly status reports. Some receivers are able to use these signals, others are not. Receivers must be programmed to the transmitter code before system testing and operation. Refer to the receiver’s instructions for details on operation and programming.\u003c\/p\u003e\n\u003cp\u003eEach DXS-25 is powered by two self-contained type 2032 3-volt lithium batteries (included). When the batteries voltage gets low, a low battery report is sent with any alarm or status report to notify the receiver. The red LED will blink when the transmitter is activated with low batteries.\u003c\/p\u003e\n\u003cp\u003eA removable pocket clip and belt clip are provided for each transmitter. Either can be attached to the back of the transmitter allowing the unit to be clipped to shirt pocket or slid onto a belt.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete RF supervision\u003c\/li\u003e\n\u003cli\u003eAlarm, supervisory, and low battery transmissions\u003c\/li\u003e\n\u003cli\u003eUnique “Extra” top button\u003c\/li\u003e\n\u003cli\u003eHigh visibility operate LED\u003c\/li\u003e\n\u003cli\u003eTwo type 2032 lithium batteries supplied\u003c\/li\u003e\n\u003cli\u003ePocket and belt clip supplied\u003c\/li\u003e\n\u003cli\u003eDXS format\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e1.6″ W x 4.2″ H x 0.8″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036302641,"sku":"DXS-25","price":755.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXS-25_777587e5-a4fd-4d75-8e71-fe887773e9e2.jpg?v=1720569694"},{"product_id":"linear-dxs-31","title":"Linear DXS-31: Supervised Universal Door\/Window Transmitter","description":"\u003ch1\u003eThe Linear model DXS-31 Supervised Universal Door\/Window Transmitter is a battery powered stationary transmitter designed for use with Linear’s DXS and DX format receivers and can be used in a variety of wireless remote control applications. \u003c\/h1\u003e\n\u003cp\u003eTriggering the transmitter with its built-in magnetic switch, an external switch or an external glass break detector sends a digitally coded wireless signal to its companion receiver.\u003c\/p\u003e\n\u003cp\u003eThe digital DXS code format features over a million possible codes. The DXS transmitters are precoded at the factory to unique codes, so no field coding is required. The DXS-31 can send four different codes: alarm, restore, low battery and status.\u003c\/p\u003e\n\u003cp\u003eIn a typical installation, the magnet is mounted on a door or window and the transmitter is mounted on the frame. When the magnet moves more than 1\/2″ away from the transmitter, an alarm signal is sent. When the magnet returns next to the unit, a restore signal is sent. Alarms and restores can also be sent from external contacts wired to the terminal block. Pressing the case sends a test transmission that updates the receiver to the current state of the contacts and lights the test indicator.\u003c\/p\u003e\n\u003cp\u003eWhen the transmitter’s case is open, the transmit indicator will light each time the unit sends an alarm or restore signal. The indicator is disabled when the case is closed (except for test transmissions). The indicator will flash during operation and test when the batteries are low.\u003c\/p\u003e\n\u003cp\u003eThe transmitter is powered from two 3-Volt #2032 lithium batteries with an expected battery life of up to 3 years.\u003c\/p\u003e\n\u003cp\u003eEvery hour, the DXS-31 will send a status transmission to the receiver. The hourly signal updates the receiver to the transmitter’s condition. By monitoring status transmissions, the receiver can determine if a transmitter has a low battery or has been removed from the system. DXS format receivers can monitor status signals, DX format receivers cannot.\u003c\/p\u003e\n\u003cp\u003eA three-position terminal block is for connection to normally closed external contacts or a normally open Window Bug type glass break sensor. An internal jumper selects which input to use. Selections are: internal switch only, external switch only, both external and internal switch, and glass break sensor.\u003c\/p\u003e\n\u003cp\u003eAnother internal jumper selects an instant or delayed transmission code. This jumper doesn’t delay the actual transmissions, but changes the code of the signal sent so the receiver can process the signal as coming from an entry\/exit delay transmitter.\u003c\/p\u003e\n\u003cp\u003eA snap-on transmitter mounting plate is provided for easy installation. The magnet is adjustable with four height positions. A 1\/4″ high magnet spacer is also supplied to snap on to the base of the magnet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAlarm, alarm restore, supervisory and low battery transmissions\u003c\/li\u003e\n\u003cli\u003eIncludes magnet for internal contact\u003c\/li\u003e\n\u003cli\u003eIncludes mounting shoe\u003c\/li\u003e\n\u003cli\u003eExternal Contact Terminals\u003c\/li\u003e\n\u003cli\u003eDXS format\u003c\/li\u003e\n\u003cli\u003eN\/O or N\/C input loop circuit\u003c\/li\u003e\n\u003cli\u003ePowered by 2032 two lithium batteries (included)\u003c\/li\u003e\n\u003cli\u003eOptional 2450 lithium batteries can be used for extended life\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e1.5″ W x 3.3″ H x 0.88″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036335409,"sku":"DXS-31","price":505.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXS-31_f98f3b04-f294-478f-a3b1-0662747023ee.jpg?v=1720569692"},{"product_id":"linear-dxs-54","title":"Linear DXS-54: Supervised Passive Infrared Motion Detector Transmitter (PERS)","description":"\u003ch1\u003eThe Linear model DXS-54 Supervised Passive Infrared Motion Detector Transmitter is a battery powered passive infrared motion detector with a built-in transmitter designed for use with Linear’s DXS and DX format receivers and PERS consoles.\u003c\/h1\u003e\n\u003cp\u003eIn PERS installations, the DXS-54 functions to reset the PERS activity timer. When the passive infrared sensor detects motion in its field of view, the transmitter sends a digitally coded wireless signal to the PERS console.\u003c\/p\u003e\n\u003cp\u003eThe digital DXS code format features over a million possible codes. The DXS transmitters are pre-coded at the factory to unique codes, so no field coding is required. The DXS-54 can send three different signals: activity timer reset, low battery, and status.\u003c\/p\u003e\n\u003cp\u003eIn a PERS installation, the motion detector is mounted indoors in a corner or on a wall between six and eight feet high. The sensor will monitor the infrared level in its detection pattern. If the level increases or decreases rapidly (as when a person moves through the area) the transmitter triggers, resetting the activity timer and preventing an inactivity alarm.\u003c\/p\u003e\n\u003cp\u003eThe unit is powered from a 9-Volt alkaline battery. The battery’s life can be up to three years depending on the area’s traffic. When the battery gets low, the test indicator will flash and a low battery signal will be sent to the PERS console when the detector senses motion.\u003c\/p\u003e\n\u003cp\u003eApproximately every hour, the DXS-54 will send a status transmission to the PERS console. The hourly signal updates the PERS console to the transmitter’s condition. By monitoring status transmissions, the PERS console can determine if a transmitter has a low battery or has been removed from the system.\u003c\/p\u003e\n\u003cp\u003eTo conserve battery life, during normal operation, the detector can trigger the transmitter a maximum of once every four minutes.\u003c\/p\u003e\n\u003cp\u003eFor setup and testing, pressing the detector’s TEST button places the unit in walk-test mode for four minutes. The installer can walk in front of the unit while viewing the red test indicator through the detector’s lens to determine the detection area.\u003c\/p\u003e\n\u003cp\u003eIn walk-test, an activity timer reset signal is sent each time the walk-test indicator lights. During normal operation, the detector requires a pulse count of three events in eight seconds before sending an activity timer reset transmission.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eActivity timer reset, supervisory, and low battery transmissions\u003c\/li\u003e\n\u003cli\u003eWalk-test mode\u003c\/li\u003e\n\u003cli\u003eFresnel lens with 24 facets\u003c\/li\u003e\n\u003cli\u003eBattery saver circuitry\u003c\/li\u003e\n\u003cli\u003e9 volt alkaline battery supplied\u003c\/li\u003e\n\u003cli\u003eDXS format\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e3.2″ W x 4.4″ H x 1.75″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036663089,"sku":"DXS-54","price":1145.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXS-54_742a1696-cb78-45e4-8c42-d06ab032a8f7.jpg?v=1720569689"},{"product_id":"linear-dxsr-1504","title":"Linear DXSR-1504: Supervised 4-Channel Receiver","description":"\u003ch1\u003eThe Linear model DXSR-1504 Supervised 4-Channel Receiver is a four channel, supervised digital receiver with solid state outputs designed for use with Linear’s DX and DXS Format transmitters that can be used in a variety of security and remote control applications.\u003c\/h1\u003e\n\u003cp\u003eWhen the receiver detects a signal from a transmitter programmed into its memory, the appropriate channel output activates. The channel outputs have three optional configurations; momentary, toggle on\/off, and latch until restored. Status and low battery outputs are for supervisory indications. Cutting jumpers select which channels require supervisory status reports from transmitters.\u003c\/p\u003e\n\u003ch2\u003eThe Linear model DXSR-1504 incorporates a dual high-sensitivity superheterodyne diversity receiver with two whip antennas. This type of receiver provides superior performance by preventing loss of signal due to multi-path interference.\u003c\/h2\u003e\n\u003cp\u003eIn a typical installation, the receiver is connected to an alarm control panel, door strike, camera, high current relay or some other devices. Transmitters are used to activate or control the devices. The receiver should be mounted indoors or inside a weather resistant non-metallic housing for outdoor use.\u003c\/p\u003e\n\u003cp\u003eThe digital DX\/DXS code format features over a million possible codes. The transmitters are precoded at the factory to unique codes, so no field coding is required. For versatility, any transmitter can be programmed into any receiver channel. Receivers must be programmed to recognize the transmitter’s code before system testing and operation. Up to 32 transmitters can be programmed into the receiver. Each button on multi-button portable transmitters send a unique code, and are programmed as separate transmitters.\u003c\/p\u003e\n\u003cp\u003eThe CHANNEL display shows the channels activated and the presence of radio activity. Individual indicators for ALARM, STATUS, and LOW BATT show the supervisory status of each receiver channel. All outputs can be configured for normally open or normally closed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDual diversity superheterodyne receivers\u003c\/li\u003e\n\u003cli\u003eCompatible with DX and DXS transmitters\u003c\/li\u003e\n\u003cli\u003eMeasured line-of-sight range of 1,500 Feet\u003c\/li\u003e\n\u003cli\u003eQuick-learn programming\u003c\/li\u003e\n\u003cli\u003eSelectable supervision\u003c\/li\u003e\n\u003cli\u003eIndividual outputs per RF channel for alarm, low battery, and status trouble reports\u003c\/li\u003e\n\u003cli\u003e7-segment channel display (decimal point indicates RF activity)\u003c\/li\u003e\n\u003cli\u003eLED Indication for alarm, low battery, and status\u003c\/li\u003e\n\u003cli\u003eSolid state outputs\u003c\/li\u003e\n\u003cli\u003e100 mA maximum output rating\u003c\/li\u003e\n\u003cli\u003eSelectable outputs per channel: momentary, latch, toggle\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 10.2 to 14.4 VDC or 12 to 16 VAC\u003c\/li\u003e\n\u003cli\u003eCurrent consumption: 30 mA standby, 120 mA operating @ 12 VDC\u003c\/li\u003e\n\u003cli\u003e7.25″ W x 5.0″ H x 1.0″ D (without antennas)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213036695857,"sku":"DXSR-1504","price":950.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXSR-1504_e3df6eda-2d1d-4618-943f-98e847682b31.jpg?v=1720569686"},{"product_id":"linear-dxt-42","title":"Linear DXT-42: 2-Button, 3-Channel Key Ring Transmitter","description":"\u003ch1\u003eThe Linear model DXT-42 2-Button, 3-Channel Key Ring Transmitter is a battery powered, portable, miniature transmitter designed for use with Linear’s DX Format receivers.\u003c\/h1\u003e\n\u003cp\u003eEach transmitter can be used in a limitless number of wireless remote control applications. Pressing a transmitter button sends a digitally coded wireless signal to its companion receiver. The transmitter buttons have a positive click feel.\u003c\/p\u003e\n\u003cp\u003eThe digital DX code format features over a million possible codes. The DX transmitters are precoded at the factory to unique codes, so no field coding is required. Transmitters can send a signal for up to 10 seconds with each button activation.\u003c\/p\u003e\n\u003cp\u003eThe DXT-42 is a two-button, three-code transmitter. Each button sends a unique code. Pressing both buttons together sends code three. Press button(s) for a minimum of two seconds to insure receiver activation. The unit is powered from two 3-Volt Type 1616 lithium batteries with an expected battery life of up to 5 years. When the transmitter’s range decreases, or stops functioning, replace the batteries.\u003c\/p\u003e\n\u003cp\u003eA detachable key ring is provided with each transmitter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo type 1616 lithium batteries supplied\u003c\/li\u003e\n\u003cli\u003eDetachable key ring supplied\u003c\/li\u003e\n\u003cli\u003eDX format\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e1.25″ W x 2.25″ H x 0.48″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213037252913,"sku":"DXT-42","price":590.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXT-42_d49b30e8-3ab0-4b0c-bb3a-e93f9fa7dec7.jpg?v=1720569682"},{"product_id":"linear-dxt-601","title":"Linear DXT-601: 1-Button, 1-Channel Key Ring Transmitter","description":"\u003ch1\u003eThe Linear model DXT-601 1-Button, 1-Channel Key Ring Transmitter is a battery powered, portable, miniature transmitter designed for use with Linear’s DX Format receivers that can be used in a limitless number of wireless remote control applications. \u003c\/h1\u003e\n\u003cp\u003eThe digital DX code format features over a million possible codes. The DX transmitters are precoded at the factory to unique codes, so no field coding is required. Transmitters can send a signal for up to 10 seconds with each button activation.\u003c\/p\u003e\n\u003cp\u003eThe DXT-601 is a one-button, one-code transmitter. Pressing the button sends the transmitter’s code to the receiver. Press the button for a minimum of two seconds to insure receiver activation. The transmitter button has a positive click feel. The unit is powered from two 3-Volt Type 2016 lithium batteries with an expected battery life of up to 5 years. When the transmitter’s range decreases, or stops functioning, replace the batteries.\u003c\/p\u003e\n\u003cp\u003eA detachable key ring is provided with each transmitter.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo type 2016 lithium batteries supplied\u003c\/li\u003e\n\u003cli\u003eDetachable key ring supplied\u003c\/li\u003e\n\u003cli\u003eDX format\u003c\/li\u003e\n\u003cli\u003eRF frequency: 315 MHz\u003c\/li\u003e\n\u003cli\u003e1.25″ W x 2.25″ H x 0.48″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213037285681,"sku":"DXT-601","price":575.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_DXT-601_fa27be2c-dcdb-4e36-9661-f45ddd3fd29d.jpg?v=1720569680"},{"product_id":"linear-et-1b","title":"Linear ET-1B: Emergency Transmitter","description":"\u003ch1\u003eThe Linear model ET-1B Emergency Transmitter is a single-channel transmitter normally used as a “panic button” in security systems that can also be used in many remote switching applications where a portable transmitter is required.\u003c\/h1\u003e\n\u003cp\u003ePressing both buttons on the sides of the transmitter at the same time will send a transmission.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e2-Button lockout operation\u003c\/li\u003e\n\u003cli\u003eWater resistant\u003c\/li\u003e\n\u003cli\u003eAdjustable lanyard with breakaway release\u003c\/li\u003e\n\u003cli\u003eStandard digital format: 256 selectable codes\u003c\/li\u003e\n\u003cli\u003ePowered by one 12-volt battery (included)\u003c\/li\u003e\n\u003cli\u003eRF frequency: 303.875 MHz\u003c\/li\u003e\n\u003cli\u003e1.72″ W x 1.72″ H x 0.75″ D\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213037318449,"sku":"ET-1B","price":690.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_ET-1B_4621c346-292f-4b40-95ec-48e21b32d3f7.jpg?v=1720569678"},{"product_id":"linear-xt-1","title":"Linear XT-1: 1-Channel Stationary Mid-range Transmitter","description":"\u003ch1\u003eThe Linear model XT-1 1-Channel Stationary Mid-range Transmitter is designed for use in various wireless remote control applications. When triggered with an external switch, the Model XT-1 transmitter sends a 10 watt, 27.255 MHz, digital encoded, FSK modulated signal to its companion receiver.\u003c\/h1\u003e\n\u003cp\u003eThe receiver will verify the digital code, activate its output, and trigger the remote device.\u003c\/p\u003e\n\u003cp\u003eThe XT-1 transmitter has full supervision capabilities. If the status option is selected, the XT-1 sends hourly status signals to its receiver. If these signals cease, the receiver will indicate trouble by activating its status output after four hours. Contact supervision allows the receiver’s output to follow the transmitter’s input, staying activated as long as the transmitter input is activated. Alternately, an auto-restore option can be selected, causing a momentary receiver output each time the transmitter is activated. Either a N\/O or N\/C input (jumper selectable) can trigger the transmitter.\u003c\/p\u003e\n\u003cp\u003ePower for the XT-1 transmitter can come from an external regulated 12 VDC, 2-Amp power supply (Linear Model T-1224DC) or from a 12-volt battery. A 3-amp fuse protects the unit from reverse power polarity. The XT-1 draws about 15 µA standby, and about two amps during transmissions. If the power supply voltage drops below 10.5 volts, a low battery message will be included with any signal transmitted, causing the receiver’s low battery output to activate.\u003c\/p\u003e\n\u003cp\u003eTwo antennas (sold separately) are available for the XT-1. The Model ANT-1A is an 7-inch rubber duck antenna for short range applications (less than 1 mile). The ANT-1A is supplied with a CON-180A (straight) connector to mate the antenna to the transmitter. For a right angle antenna mounting, use a CON-90A right-angle connector with the CON-180A. The Model ANT-2 is a 3-foot whip antenna for use in long range or difficult installations where more range from the XT-1 is required. A common 9-foot 1\/4 wave CB whip antenna can also be used with the XT-1 for maximum range.\u003c\/p\u003e\n\u003cp\u003eTwo 8-position switches set the unit’s system code. This code must be matched in the XT-1’s receiver. There are 65,536 different system codes possible. The 6-position option switch selects the transmitter’s channel, receiver’s bank (for XR-16 receiver only), and options for status and auto-restore transmissions.\u003c\/p\u003e\n\u003cp\u003eThe transmitter is housed in a rugged weather-resistant metal enclosure with a sturdy SO-239 antenna connector and a water-tight wiring strain relief bushing. During transmissions, the red operation indicator (visible through a window on the case) lights. If the XT-1’s input voltage is low, the indicator will blink during transmissions.\u003c\/p\u003e\n\u003c!----\u003e","brand":"Linear","offers":[{"title":"Default Title","offer_id":48213037351217,"sku":"XT-1","price":3235.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/5314\/3345\/files\/LInear_XT-1_b7246a9a-cf70-4558-86a0-d41adf144f9e.jpg?v=1720569675"}],"url":"https:\/\/ameratec.com.hk\/collections\/rf-transmitters-receivers.oembed","provider":"Ameratec","version":"1.0","type":"link"}