LPT-M Modbus® 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

A full featured, 3 channel, digital (Modbus®) gas detector with many gas sensor choices

Applications

  • Parking Facilities
  • Arenas and Pools
  • Chiller Rooms
  • Manufacturing Plants
  • Maintenance Facilities
  • Food Processing Plants
  • and many more...

Key Features

  • 1, 2 or 3 channel operation with internal and/or remote sensor configurations
  • Modbus® RS-485 RTU communication
  • LCD display
  • One 2A SPDT dry contact relay
  • Internal audible alarm
  • 24 VAC/VDC power
  • 4-conductor daisy chain network wiring
  • Unobtrusive calibration and menu navigation using a magnetic wand
  • Optional display heater for cold environment applications
  • Standard water / dust tight, corrosion resistant enclosure (drip proof)
  • IP54 rated with optional splash guard installed.

Description

The LPT-M is a full featured, three channel, digital transmitter for use in non-hazardous, non-explosion rated, commercial and light industrial applications. It is available with a wide range of internal and/or remote sensors and sensor types including electrochemical, catalytic and PID TVOCs.

The LPT-M may be configured to operate as a standalone fixed system or be part of a digital network. It offers a Modbus® RS-485 RTU output signal for communicating with a Controller and/or a Building Automation System, an audible internal alarm, one SPDT dry contact relay, LCD display with user selectable functions, temperature compensation and thermal resetting fuses all in a RoHS compliant package.

The LPT-M comes in a standard water / dust tight, corrosion resistant ABS / polycarbonate enclosure with a hinged, secured door. With the optional, factory installed splash guard the enclosure is IP54 rated and provides protection in water spray or wash down applications. An optional heater is available for continued operation in cold environment 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)
Catalytic Sensors (remote)
Hydrogen (H2), Methane (CH4), Propane (C3H8)
PID Sensors (remote)
TVOCs
Infrared Sensors (remote)
Propane (C3H8), Carbon dioxide (CO2)
Mechanical
Enclosure
ABS / Polycarbonate, corrosion resistant
Copper coated interior to reduce RF interference
IP54 rated with optional splash guard installed
Weight
363 g / 0.8 lbs
Size
127 x 127 x 71 mm / 5.0 x 5.0 x 2.8 inches
User Interface
Display
Graphic LCD, green border
Magnetic switches to initiate calibration without opening the enclosure
Input/Output
Output
Modbus® RS-485 RTU
Relay
One SPDT dry contact, rated 30 Volts, 2 Amps max
Audible Alarm
Standard internal buzzer
Electrical
Power Requirement
16-30 VDC, 3 W, Class 2
12-27 VAC, 50-60 Hz, 3 VA, Class 2
Current Draw
30 mA (buzzer & relay energized, 2 sensors)
Wiring
LAN Modbus® RTU (version 1.1b3) RS-485, 16 gauge, 4-conductor shielded network wiring (daisy-chain)
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. 205-12 / 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
LPT-M-NH3
Single channel, electrochemical ammonia (NH3) sensor (0 - 500 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-TCO
Single channel, internal electrochemical 6-year carbon monoxide (CO) sensor (0 - 200 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-CL2
Single channel, electrochemical chlorine (Cl2) sensor (0 - 5 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-CLO2
Single channel, electrochemical chlorine dioxide (ClO2) sensor (0 - 1.0 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-C2H4
Single channel, electrochemical ethylene (C2H4) sensor (0 - 200 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-EETO
Single channel, electrochemical ethylene oxide (C2H4O) sensor (0 - 20 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-F2
Single channel, electrochemical fluorine (F2) sensor (0 - 1 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-CH2O
Single channel, electrochemical formaldehyde (HCHO / CH2O) sensor (0 - 5 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-EH2
Single channel, electrochemical hydrogen (H2) sensor (0 - 2,000 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-H2SB
Single channel, electrochemical hydrogen sulphide (H2S) sensor (0 - 50 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-HCL
Single channel, electrochemical hydrogen chloride (HCL) sensor (0 - 20 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-HCN
Single channel, electrochemical hydrogen cyanide (HCN) sensor (0 - 100 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-HF
Single channel, electrochemical hydrogen fluoride (HF) sensor (0 – 10.0 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-NO
Single channel, electrochemical nitric oxide (NO) sensor (0 - 100 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-NO2A
Single channel, internal electrochemical 3-year nitrogen dioxide (NO2) sensor (0 - 10 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-NO2B
Single channel, internal electrochemical 6-year nitrogen dioxide (NO2) sensor (0 - 10 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-O2
Single channel, electrochemical oxygen (O2) sensor (0 - 25% volume range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-O3
Single channel, electrochemical ozone (O3) sensor (0 - 2 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-PH3
Single channel, electrochemical phosphine (PH3) sensor (0 - 5 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-SIH4
Single channel, electrochemical silane (SiH4) sensor (0 - 20 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-SO2
Single channel, electrochemical sulphur dioxide (SO2) sensor (0 - 20 ppm range), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-TCO-NO2B
Dual 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), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-R
Single channel, no internal sensor (set up to accept an ESH-A remote sensor), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-RT
Single channel, no internal sensor (set up to accept a remote AST-IS CO2 Analog Transmitter), LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-TCO-R
Dual channel, internal electrochemical 6-year carbon monoxide (CO) sensor (0 - 200 ppm range), must add ESH-A remote sensor, LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-TCO-RT
Dual channel, internal electrochemical 6-year carbon monoxide (CO) sensor (0 - 200 ppm range), must add a remote AST-IS CO2 Analog Transmitter, LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-NO2B-R
Dual channel, internal electrochemical 6-year nitrogen dioxide (NO2) sensor (0 - 10 ppm), must add ESH-A remote sensor, LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-NO2B-RT
Dual channel, internal electrochemical 6-year nitrogen dioxide (NO2) sensor (0 - 10 ppm), must add a remote AST-IS CO2 Analog Transmitter, LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-TCO-NO2B-R
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, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
LPT-M-TCO-NO2B-RT
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 a remote AST-IS CO2 Analog Transmitter, LCD display, Modbus® RS-485 communication, 2 A @ 30 VAC / VDC SPDT relay, audible alarm, water / dust tight enclosure 
Factory Options
-H
Internal heater for the display for improved usability in 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
TVOC PID ESH-A Remote Sensor (0 - 30 ppm range), water / dust tight enclosure 
ESH-A-SPH
TVOC PID 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

Options, Accessories and More...