LPT Low Power Transmitter

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

Single channel, analog gas detector for enclosed parking facilities, recreational facilities, oxygen depletion 
applications

Applications
Parking Facilities, Vehicle Repair Shops, Manufacturing Plants, Maintenance Facilities, Ice Rinks, Aquatic Facilities, 
Chiller Rooms, Chemical Storage Rooms, Oxygen Depletion and many more...

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.

Target Gas

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

Mechanical

Enclosure				        ABS / Polycarbonate, corrosion resistance 
				                Copper coated interior to reduce RF interference 
				                IP54 rated with optional splash guard installed

Weight				        200 g / 0.44 lbs

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

User Interface

Display				        Single color status LED

Input/Output

Output				        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

Electrical

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)

Wiring				        VDC 2-conductor 18 AWG stranded, shielded 
				                VDC 3-conductor 18 AWG stranded, shielded 
				                VAC 4-conductor 18 AWG stranded, shielded

Fuses				                Thermal, resetting

Environmental

Operating Temperature		        -20°C to 40°C (-4°F to 104°F)

Operating Humidity		        15 - 90% RH non-condensing

Certifications

Conforms to			                CSA-C22.2 No. 205-M1983 (R2009), 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: 
                                                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