LPT-A Analog Transmitter

For monitoring: Ammonia, Carbon monoxide, Chlorine dioxide, Chlorine, Ethylene, Ethylene oxide, Fluorine, 
Formaldehyde, Hydrogen, Hydrogen sulphide, Hydrogen chloride, Hydrogen cyanide, Hydrogen fluoride, Nitric oxide, 
Nitrogen dioxide, Oxygen, Ozone, Phosphine, Silane, Sulfur dioxide, Methane, Propane, Hydrogen, TVOCs, Refrigerants

Single channel, analog gas detector with many gas sensor choices

The LPT-A is a full featured, single sensor, analog transmitter available with a wide range of sensors and sensor 
types including electrochemical toxic, solid state refrigerants and catalytic combustibles. Operating as an analog 
transmitter or a stand-alone fixed system, the LPT-A offers 3-wire VDC or 4-wire VAC power, jumper selectable 
4 - 20 mA or 0 - 10 VDC analog output, one dry contact relay, thermal resetting fuses, temperature compensation, 
back lit LCD display and audible alarm, all in a RoHS compliant package.

It 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 sensor 
so that less frequent calibrations are required. For use in non-hazardous, non-explosion rated commercial and light 
industrial applications.

Target Gas

Electrochemical Sensors (internal)			Ammonia (NH3), Carbon monoxide, Chlorine (Cl2), Chlorine 
                                                                dioxide (ClO2), Ethylene (C2H4), Ethylene oxide (C2H4O), Fluorine 
                                                                (F2), Formaldehyde (CH2O), Hydrogen (H2), Hydrogen chloride (HCl), 
                                                                Hydrogen cyanide (HCN), Hydrogen fluoride (HF), Hydrogen 
                                                                sulphide (H2S), Nitric oxide (NO), Nitrogen dioxide (NO2), Oxygen 
                                                                (O2), Ozone (O3), Phosphine (PH3), Silane (SiH4), Sulphur dioxide 
                                                                (SO2)

Solid State Sensors (internal)				R22, R134A, R402A, R404A, R407C, R410A, R422D, R438A, R438A, 
                                                                R507A, R514A Refrigerants, TVOCs

Catalytic Sensors (internal or remote)			Hydrogen (H2), Methane (CH4), Propane (C3H8)

PID Sensors (remote)				        TVOCs

Infrared Sensors (remote)				        Propane (C3H8)

Mechanical

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

Weight						     363 g / 0.8 lbs

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

User Interface

Display						     Graphic LCD, grey border
                                                                Magnetic switches to initiate calibration without opening the 
                                                                enclosure

Input/Output

Output						     Linear 4 - 20 mA analog
                                         Maximum 216 Ω load (wiring plus termination resistor) @ 12 VDC
                                                                Maximum 316 Ω load (wiring plus termination resistor) @ 12 VAC 
                                                                Voltage 0 - 10 volt 
                                                                Minimum 1k ohm load

Relay						          1 SPDT dry contact, rated 30 Volts, 2 Amps max

Audible Alarm					     Standard internal buzzer

Electrical

Power Requirement					3-wire mode: 16-30 VDC, 3 W, Class 2 
                                                                4-wire mode: 12-27 VAC, 50-60 Hz, 3 VA, Class 2

Current Draw					     125 mA @ 24VDC (max)

Wiring						     VDC (or ground referenced AC): 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: (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