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

Applications

Parking Facilities
Vehicle Repair Shops
Arenas and Pools
Refrigeration Rooms
Chiller Rooms
Battery Charging Rooms
Hotels
Airports
and many more...

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Key Features

Single channel, with internal or remote sensor options
Linear 4 - 20 mA analog or 0 - 10 volt output signal
LCD display
One 2A SPDT dry contact relay
Internal audible alarm
3-wire VDC or 4-wire VAC power
24 volt DC or AC power (nominal)
Unobtrusive calibration and menu navigation using a magnetic wand
Optional heater for cold environment applications
Standard water / dust tight, corrosion resistant enclosure (drip proof)
IP54 rated with optional splash guard installed

Description

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.

Specifications

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

Product Codes

LPT-A-NH3

Electrochemical ammonia (NH3) sensor (0 - 500 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-COA

Electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, sensor CEF, water / dust tight enclosure

LPT-A-COB

LPT-A-CL2

Electrochemical chlorine (Cl2) sensor (0 - 5 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure with PTFE membrane sensor element protection

LPT-A-CLO2

Electrochemical chlorine dioxide (ClO2) sensor (0 - 1.0 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-C2H4

Electrochemical ethylene (C2H4) sensor (0 - 200 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-EETO

Electrochemical ethylene oxide (C2H4O) sensor (0 - 20 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-F2

Electrochemical fluorine (F2) sensor (0 - 1 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-CH2O

Electrochemical formaldehyde (HCHO / CH2O) sensor (0 - 5 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-EH2

Electrochemical hydrogen (H2) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-HCL

Electrochemical hydrogen chloride (HCl) sensor (0 - 20 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-HCN

Electrochemical hydrogen cyanide (HCN) sensor (0 - 30 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-HF

Electrochemical hydrogen fluoride (HF) sensor (0 – 10.0 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-H2S

Electrochemical hydrogen sulphide (H2S) sensor (0 - 50 ppm range) 3 yr life span, LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-H2SB

Electrochemical hydrogen sulphide (H2S) sensor (0 - 50 ppm range) 5+ yr life span, LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-NO

Electrochemical nitric oxide (NO) sensor (0 - 100 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-NO2A

Electrochemical nitrogen dioxide (NO2) sensor (0 - 10 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, sensor CEF, water / dust tight enclosure

LPT-A-NO2B

LPT-A-O2

Electrochemical oxygen (O2) sensor (0 - 25% volume range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-O3

Electrochemical ozone (O3) sensor (0 - 2 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure with PTFE membrane sensor element protection

LPT-A-PH3

Electrochemical phosphine (PH3) sensor (0 - 5 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SIH4

Electrochemical silane (SiH4) sensor (0 - 20 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SO2

Electrochemical sulphur dioxide (SO2) sensor (0 - 20 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR134A

Solid state refrigerant (R134A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR22

Solid state refrigerant (R22) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR402A

Solid state refrigerant (R402A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR404A

Solid state refrigerant (R404A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR407C

Solid state refrigerant (R407C) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR410A

Solid state refrigerant (R410A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR422D

Solid state refrigerant (R422D) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR438A

Solid state refrigerant (R438A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR507A

Solid state refrigerant (R507A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR513A

Solid state refrigerant (R513A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-SR514A

Solid state refrigerant (R514A) sensor (0 - 2,000 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-STVOC

Solid state TVOC sensor (0 - 500 ppm range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-CH2-100

Catalytic hydrogen (H2) sensor (0 - 100% LEL range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-CCH4-100

Catalytic methane (CH4) sensor (0 - 100% LEL range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-CC3H8-100

Catalytic propane (C3H8) sensor (0 - 100% LEL range), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

LPT-A-R

Single channel, no internal sensor (set up to accept an ESH-A remote sensor), LCD display, 4 - 20 mA or 0 - 10 VDC output, three-wire VDC or four-wire VAC power, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure

NOTE: other gases may be available upon request

Factory Options

-H

Internal heater for cold environment applications down to -40°C / 40°F

-S

Splash Guard for non sticky gas sensors, factory installed, IP54 rating

-SN

Splash Guard for sticky gas sensors (Cl2, ClO2, HCl, HCN, O3, PH3), factory installed

Remote Sensors

ESH-A-CH2-100

Catalytic Hydrogen (H2) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure

ESH-A-CCH4-100