LPT-P Digital Car Park Transmitter

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

3 channel, digital (Modbus®) gas detector for enclosed parking facilities


  • Parking Facilities
  • Vehicle Repair Shops
  • Electric Car Charging Stations
  • Battery Charging Rooms
  • and many more...

Key Features

  • 3 channel operation
  • Modbus® RS-485 RTU communication
  • LCD display
  • 24 VDC power
  • 4-conductor daisy chain network wiring
  • Standard water / dust tight, corrosion resistant enclosure (drip proof)
  • IP54 rated with optional splash guard installed


The LPT-P is an economical, 3 channel, digital transmitter that is designed to be part of a gas detection system for enclosed parking facilities/parkades and vehicle repair shop applications. It can be configured with an internal electrochemical Carbon monoxide (CO) and Nitrogen dioxide (NO2) sensor and one catalytic combustible ESH-A Remote Sensor.

The LCD display provides at-a-glance gas readings for each channel along with alarm and communication status. Navigating the menu can be done unobtrusively with a magnetic wand or by using the internal programming buttons.

The LPT-P is not a standalone gas detection device, it operates on a local area network (LAN) using Modbus® RS-485 RTU serial communications with a CET Controller, a control panel, Direct Digital Control system (DDC) or a Building Automation System (BAS). The LPT-P does not have an internal alarm or relay.

The LPT-P comes in a standard 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.



Target Gas
Internal Gas Sensors
Carbon monoxide (CO) and Nitrogen dioxide (NO2)
Remote Gas Sensors
Hydrogen (H2), Methane (CH4) or Propane (C3H8)
ABS / Polycarbonate, corrosion resistant
Copper coated interior to reduce RF interference
IP54 rated with splash guard installed
363 g / 0.8 lbs
127 x 127 x 71 mm / 5.0 x 5.0 x 2.8 inches
User Interface
Graphic LCD, white border
Magnetic switches to initiate calibration without opening the enclosure
Modbus® RS-485 RTU
Power Requirement
16-30 VDC, 3 W, Class 2
Current Draw
45 mA @24 VDC (max)
LAN Modbus® RTU (version 1.1b3) RS-485, 16 gauge, 4-conductor 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.
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, Modbus® RS-485 communication, water / dust tight enclosure 
Factory Options
Internal heater for the display for improved usability in cold environment applications down to -40°C / -40°F
Splash guard, 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 

Options, Accessories and More...