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...

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.

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), TVOCs (Isobutylene)
Solid State Sensors (internal)
Refrigerants R22, R134A, R402A, R404A, R407C, R410A, R422D, R438A, R438A, R507A
Catalytic Sensors (internal or remote)
Hydrogen (H2), Methane (CH4), Propane (C3H8)
PID Sensors (remote)
TVOC
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
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-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 - 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-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
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-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 (R507) 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 
Factory Options
-H
Internal heater for cold environment applications down to -40°C / 40°F
-S
Splash Guard, factory installed, IP54 rating  (not available for O3 HCl, or Cl2 sensors)
-SN
Splash Guard for sticky gas sensors (Cl2, HCl, or O3), factory installed, includes Calibration Adapter Slide Cap
Remote Sensors
ESH-A-CH2-100
Catalytic Hydrogen (H2) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure 
ESH-A-CCH4-100
Catalytic Methane (CH4) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure 
ESH-A-CC3H8-100
Catalytic Propane (C3H8) ESH-A Remote Sensor (0 - 100% LEL), water / dust tight enclosure 
ESH-A-SPL
PID TVOC ESH-A Remote Sensor (0 - 30 ppm range), water / dust tight enclosure 
ESH-A-SPH
PID TVOC ESH-A Remote Sensor (0 - 300 ppm range), water / dust tight enclosure 
ESH-A-JET
Infrared Propane (C3H8) ESH-A Remote Sensor (0 - 100% LEL) range), water / dust tight enclosure 
ESH-SR410A-Z
Dongle style remote ESH refrigerant (R410A) sensor (0 - 2000 ppm) for hotel applications

Options, Accessories and More...