LPT-B BACnet® Transmitter

For monitoring: Carbon monoxide, Nitrogen dioxide, Methane, Propane, Hydrogen, TVOCs

A full featured, 3 channel, digital (BACnet®) gas detector designed to be used alone or integrated into an existing BACnet® network


  • Parking Facilities
  • Arenas and Pools
  • Chiller Rooms
  • Manufacturing Plants
  • Maintenance Facilities
  • Food Processing Plants
  • Ice Cleaning Machine Rooms
  • and many more...

Key Features

  • 3 channel operation
  • BACnet® MS/TP communication
  • LCD display
  • One 2A SPDT dry contact relay
  • Internal audible alarm
  • 24 VAC/VDC power
  • 4-conductor daisy chain network wiring
  • Unobtrusive calibration and menu navigation using a magnetic wand
  • Standard water / dust tight, corrosion resistant enclosure (drip proof)
  • IP54 rated with optional splash guard installed.


The LPT-B is a full featured, 3 channel, BACnet® transmitter for use in non-hazardous, non-explosion rated, commercial and light industrial applications. It may be configured to operate as a standalone fixed system or be part of a digital network. It offers a BACnet® MS/TP output signal for communicating with a Controller or Building Automation System, an audible internal alarm, one SPDT dry contact relay, LCD display with user selectable functions, temperature compensation and thermal resetting fuses all in a RoHS compliant package.

The LPT-B comes in a standard water / dust tight, corrosion resistant ABS / polycarbonate enclosure with a hinged, secured door. It is IP54 rated with the optional splash guard installed which provides protection in water spray or wash down applications.

NOTE: The LPT-B is not compatible with CETCI’s Controllers, it is designed to be used alone or integrated into an existing BACnet® network.

Target Gas
Internal Gas Sensors
Carbon monoxide and Nitrogen dioxide (NO2)
Remote Catalytic Sensors
Hydrogen (H2), Methane (CH4) or Propane (C3H8)
Remote PID Sensors
Remote Infrared Sensors
Propane (C3H8)
ABS / Polycarbonate, corrosion resistant
Copper coated interior to reduce RF interference
IP54 rated with optional splash guard installed
363 g / 0.80 lbs
127 x 127 x 71 mm / 5.0 x 5.0 x 2.8 inches
User Interface
Graphic LCD, yellow border
Magnetic switches to initiate calibration without opening the enclosure
BACnet® MS/TP communications
One SPDT dry contact, rated at 30 volts, 2 amps max
Audible Alarm
Standard internal buzzer, enable/disable, rated 90 dB @ 10 cm / 4 in
Power Requirement
16-30 VDC, 3 W, Class 2
12-27 VAC, 50-60 Hz, 3 VA, Class 2
Current Draw
55 mA (buzzer & relay energized, 2 sensors)
4-conductor, 16 AWG stranded, shielded network wiring (daisy-chain)
Thermal, resetting
Operating Temperature
-20°C to 40°C (-4°F to 104°F)
Operating Humidity
15 - 90% RH non-condensing
Conforms to
CSA-C22.2 No. 205-12 / UL508 (Edition 17):2007
EMC Directive 2004/108/EC, EN 50270:2006, Type 1, EN61010
FCC. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Listed by BTL
RoHS compliant circuit boards
Product Codes
Three channel, internal electrochemical 6-year carbon monoxide (CO) sensor (0 - 200 ppm range) and internal electrochemical 6-year nitrogen dioxide (NO2) sensor (0 - 10 ppm), must add ESH-A remote sensor, LCD display, BACnet® MS/TP communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure
Factory Options
Enclosure mounted (on side), strobe with audible, 40 mm / 2 in dia, 80 " ashes per min, siren volume 85 dB, drip proof
Splash Guard for non sticky gas sensors, factory installed, IP54 rating
Remote Sensors
Catalytic Hydrogen (H2) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure 
Catalytic Methane (CH4) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure 
Catalytic Propane (C3H8) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure 
TVOC PID ESH-A Remote Sensor (0 - 30 ppm range), water / dust tight enclosure 
TVOC PID ESH-A Remote Sensor (0 - 300 ppm range), water / dust tight enclosure 
Infrared Propane (C3H8) ESH-A Remote Sensor (0 - 100% LEL) range), water / dust tight enclosure

Options, Accessories and More...