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For monitoring: Ammonia, Carbon monoxide, Nitrogen dioxide, Chlorine, Ozone or Oxygen


Key Features

  • Single channel
  • Linear 4 - 20 mA output signal
  • 2-wire loop, 3-wire VDC or 4-wire VAC power
  • Standard water / dust tight, corrosion resistant enclosure (drip proof)
  • IP54 rated with optional splash guard installed



The LPT is an economical, single sensor, analog transmitter for monitoring toxic gases non-hazardous, non-explosion proof rated commercial and light industrial applications. This basic transmitter is designed to be part of a fixed system with a Controller for applications such as car parks, vehicle repair, aquatic centers, ice rinks and oxygen depletion applications. It features a two-wire loop power, three-wire VDC or four-wire VAC power, 4 - 20 mA linear output signal, thermal resetting fuses, temperature compensation, and visual LED indication for power and fault conditions, all in a RoHS compliant package. Comes standard with a water / dust tight, corrosion resistant ABS / polycarbonate enclosure with a hinged, secured door. With the optional splash guard installed, the enclosure is IP54 rated and ideal for use in water spray or wash down applications.

Automated calibration and other maintenance procedures are simple and easily performed in the field. For parking garage applications, our proprietary Calibration Extending Firmware (CEF) takes into account the aging of the sensors so that less frequent calibrations are acceptable in non-critical applications.

LPT Low Power Transmitter

  • Target Gas


    Gas Sensors

    Ammonia (NH3), Carbon monoxide (CO), Nitrogen dioxide (NO2), Chlorine (Cl2), Ozone (O3), Oxygen (O2)




    ABS / Polycarbonate, corrosion resistance


    Copper coated interior to reduce RF interference


    IP54 rated with optional splash guard installed


    200 g / 0.44 lbs


    127 x 127 x 53 mm / 5.0 x 5.0 x 2.1 inches

    User Interface



    Single color status LED




    Linear 4 - 20 mA


    Maximum 216 Ω load


    (wiring plus termination resistor) at 16 VDC


    Maximum 316 Ω load


    (wiring plus termination resistor) at 12 VAC



    Power Requirement

    2-wire mode: 16 - 30 VDC, 1 W, Class 2


    3-wire mode: 16 - 30 VDC, 1 W, Class 2


    4-wire mode: 12 - 27 VAC, 50-60 Hz, 1 VA, Class 2

    Current Draw

    25 mA @ 24 VDC (max)


    VDC 2-conductor 18 AWG stranded, shielded


    VDC 3-conductor 18 AWG stranded, shielded


    VAC 4-conductor 18 AWG stranded, shielded


    Thermal, resetting

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