cGas Detector Digital Transmitter

For monitoring: Ammonia, Carbon monoxide, Carbon dioxide, Chlorine, Ethylene, Ethylene oxide, Formaldehyde, Hydrogen, Hydrogen fluoride, Hydrogen sulphide, Nitric oxide, Nitrogen dioxide, Oxygen, Ozone, Sulfur dioxide, Ethanol, Dimethyl ether, Methanol, Methane, Propane, Hydrogen, TVOCs, Refrigerants

One or two channel Modbus® or BACnet® gas detector with flexible customization options and Plug & Play Smart Sensor Technology

Applications

Parking Facilities / Vehicle Repair Shops
Ice Arenas / Swimming Pools
Refrigeration Rooms / Chiller Rooms
Battery Charging Rooms
Manufacturing Plants
Maintenance Facilities
Greenhouses
CO2 Fire Suppression
CO2 Storage Rooms
CO2 Refrigeration Systems
Microdistilleries
Chemical Plants
Perfume/Beauty Products Manufacturing
Household Products Manufacturing
Sewage Treatment Facilities
and many more...

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Key Features

Up to 2 gas channel configurations
User in the field configurable BACnet® MS/TP RS-485 or Modbus® RTU RS-485 digital output signal
Easy Plug & Play Smart Sensor replacement at end of life, comes pre-calibrated
Bright LCD display
USB port for configuration changes and firmware upgrades
Internal 2A SPDT dry contact relay with or without internal buzzer (Option -RBZ or Option -RLY)
Optional RH & Temperature sensor (Option -RHT)
Optional low temperature operation package (Option -LT)
Optional factory installed splash guard (Option -S or Option -SN)
Standard black, ABS/polycarbonate, water / dust tight, corrosion resistant enclosure (drip proof), IP54 with optional splash guard installed
Sensor Calibrating Extending Firmware (CEF) for enclosed parking applications
RoHS compliant circuit boards

Description

The cGas Detector is a digital, one or two channel gas detection transmitter that offers greater flexibility at a lower cost with customized sensor combinations and specialized options for adding only the functionality you need. It is ideal for monitoring toxic, combustible and refrigerant gases in commercial and light industrial, non-hazardous (non-explosion rated) environments.

Output is user selectable in the field with your choice of BACnet® or Modbus® for communicating with a Controller or a Building Automation System. Pre-calibrated sensors with true Plug & Play Smart Sensor technology makes replacing sensors quick and easy.

Powered by 24 VDC or ground reference AC, the digital cGas Detector it has an LCD display, temperature compensation, thermal resetting fuses and the firmware and configuration can be upgraded in the field using the USB connection. Specialized optional features include, relative humidity and temperature monitoring, low temperature operation, relay and wash-down / water spray protection.

The digital cGas Detector comes in a standard water / dust tight, corrosion resistant ABS / polycarbonate enclosure with a hinged, secured door. With the optional, factory installed standard splash guard the enclosure is IP54 rated and provides protection in water spray or wash down applications.

Specifications

Target Gas

Electrochemical Sensors

Ammonia (NH3), Carbon monoxide (CO), Chlorine (CL2), Ethylene (C2H4), Ethylene oxide (C2H4O), Formaldehyde (CH2O), Hydrogen (H2), Hydrogen fluoride (HF), Hydrogen sulphide (H2S), Nitric oxide (NO), Nitrogen dioxide (NO2), Oxygen (O2), Ozone (O3), Sulphur dioxide (SO2)

Infrared Sensor

Carbon dioxide (CO2)

Target Gas

Solid State Sensors

Refrigerants R22, R134A, R402A, R404A, R407C, R410A, R422D, R438A, R448A, R449A, R507A, R513A, R514A, TVOCs

Catalytic Sensors

Ammonia (NH3), Hydrogen (H2), Methane (CH4), Propane (C3H8), Ethanol or Dimethyl Ether (C2H6O), Methanol (CH4O)

PID Sensors

TVOC

Mechanical

Enclosure

Black ABS / Polycarbonate, corrosion resistant

Copper coated interior to reduce RF interference

IP54 rated with standard splash guard installed (Option -S)

Weight

400 g / 14 oz

Size

127 x 127 x 76 mm / 5.0 x 5.0 x 3.0 inches

User Interface

Display (standard)

2-line by 16 character graphic LCD
Operating Temp: 0°C to 40°C / 32°F to 104°F

Display (Option -LT)

2-line by 16 character OLED display for cold environment applications down to -40°C / -40°F

Push Buttons

Initiate calibration and menu options with internal UP, DOWN and ENTER push buttons

USB Port

Internal port for USB memory stick for field firmware / configuration upgrades

Input/Output

Communication

User configurable in the field, BACnet® MS/TP (version 1 rev 14) RS-485 or Modbus® RTU (version 1.1b3) RS-485

RH & Temperature (Option -RHT)

User selectable units DegC or DegF

Relay & Buzzer*

1 SPDT relay rated 30 volts, 2 amp max with
internal buzzer rated 90 dB @ 10 cm / 4 in, enable/disable

Relay (Option -RLY)

1 SPDT relay rated 30 volts, 2 amp max

Electrical

Power Requirement

16-30 VDC, 3 W*, Class 2
*dependent on sensor type

12-27 VAC, 50-60 Hz, 3 VA*, Class 2
*dependent on sensor type

Wiring

VDC or VAC (ground referenced) 4-conductor shielded 16 AWG stranded within conduit, network wiring (daisy-chain)

Fuse(s)

Automatic resetting thermal

Environmental

Operating Temperature

0°C to 40°C (32°F to 104°F), temperatures below 0°C / 32°F require Option-LT

Operating Humidity

15 - 90% RH non-condensing

Certifications

Conforms to

CSA-C22.2 No. 205-12, UL508 (Edition 18):2018

EMC Directive 2014/30/EU, EN 50270:2015, 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.

Listed by BTL

RoHS compliant circuit boards

CO Sensor Complies with

UL2075, 2nd Edition, Standard for Gas and Vapour Detectors and Sensors

Product Codes

4 Series Electrochemical Gas Sensors

CGAS-D-NH3

Electrochemical ammonia (NH3) sensor (0 - 500 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-NH3-3%

Single channel, catalytic ammonia (NH3) sensor (0 - 3.0% vol range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

NOTE: This is not a life safety device. This is a backup redundancy detector for monitoring potentially high levels of ammonia.

CGAS-D-CO

Electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-100

Electrochemical carbon monoxide (CO) sensor (0 - 100 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-250

Electrochemical carbon monoxide (CO) sensor (0 - 250 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-300

Electrochemical carbon monoxide (CO) sensor (0 - 300 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-500

Electrochemical carbon monoxide (CO) sensor (0 - 500 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CO sensor UL2075 Approved

CGAS-D-C2H4*

Electrochemical ethylene (C2H4) sensor (0 - 200 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

*not suitable for use in applications with continuous exposure to ethylene, i.e. ripening rooms, use LPT-A, LPT-B or LPT-M instead

CGAS-D-EETO

Electrochemical ethylene oxide (C2H4O) sensor (0 - 20 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CH2O

Electrochemical formaldehyde (HCHO / CH2O) sensor (0 - 5 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-EH2

Electrochemical hydrogen (H2) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-H2S

Electrochemical hydrogen sulphide (H2S) sensor (0 - 50 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-NO

Electrochemical nitric oxide (NO) sensor (0 - 100 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-NO2

Electrochemical nitrogen dioxide (NO2) sensor (0 - 10 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-O2

Electrochemical oxygen (O2) sensor (0 - 25% volume range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SO2

Electrochemical sulphur dioxide (SO2) sensor (0 - 20 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

Carbon Dioxide Gas Sensors

CGAS-D-CO2-2K

Internal infrared carbon dioxide (CO2) sensor (0 - 2,000 ppm), LCD display, field configurable BACnet® MS/TP or Modbus® RTU RS-485 output, 1 internal relay and buzzer, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO2-5K

Internal infrared carbon dioxide (CO2) sensor (0 - 5,000 ppm), LCD display, field configurable BACnet® MS/TP or Modbus® RTU RS-485 output, 1 internal relay and buzzer, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO2-10K

Internal infrared carbon dioxide (CO2) sensor (0 - 10,000 ppm), LCD display, field configurable BACnet® MS/TP or Modbus® RTU RS-485 output, 1 internal relay and buzzer, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO2-5%

Internal infrared carbon dioxide (CO2) sensor (0 - 5% vol), LCD display, field configurable BACnet® MS/TP or Modbus® RTU RS-485 output, 1 internal relay and buzzer, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

4 Series Sticky Gas Sensors

CGAS-D-CL2

Electrochemical chlorine (Cl2) sensor (0 - 5 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CL2-10

Electrochemical chlorine (Cl2) sensor (0 - 10 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-HF

Electrochemical hydrogen fluoride (HF) sensor (0 - 10.0 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-O3

Electrochemical ozone (O3) sensor (0 - 1 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

Solid State Refrigerant Gas Sensors

CGAS-D-SR22

Solid state refrigerant (R22) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR134A

Solid state refrigerant (R134A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR402A

Solid state refrigerant (R402A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR404A

Solid state refrigerant (R404A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR407C

Solid state refrigerant (R407C) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR410A

Solid state refrigerant (R410A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR422D

Solid state refrigerant (R422D) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR438A

Solid state refrigerant (R438A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR448A

Solid state refrigerant (R448A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR449A

Solid state refrigerant (R449A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR507A

Solid state refrigerant (R507) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR513A

Solid state refrigerant (R513A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SR514A

Solid state refrigerant (R514A) sensor (0 - 2,000 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

Catalytic Combustible Gas Sensors

CGAS-D-CH2-100

Catalytic hydrogen (H2) sensor (0 - 100% LEL range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CCH4-100

Catalytic methane (CH4) sensor (0 - 100% LEL range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CC3H8-100

Catalytic propane (C3H8) sensor (0 - 100% LEL range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CC2H6O-100

Catalytic ethanol or dimethyl ether (C2H6O) sensor (0 - 100% LEL range), LCD display, in field configurable Modbus RTU RS-485 or BACnet MS/TP RS-485 output, Plug & Play Smart sensor replacement, water / dust tight enclosure

CGAS-D-CCH4O-100

Catalytic methanol (CH4O) sensor (0 - 100% LEL range), LCD display, in field configurable Modbus RTU RS-485 or BACnet MS/TP RS-485 output, Plug & Play Smart sensor replacement, water / dust tight enclosure

Other Sensors

CGAS-D-STVOC

Solid state TVOC sensor (0 - 500 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SPH

PID TVOC sensor (0 - 300 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-SPL

PID TVOC sensor (0 - 30 ppm range), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-RHT

Single channel relative humidity and temperature sensor, user configurable measurement units, LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-R

No internal sensor, add required ESH-A Remote Sensor

CGAS-D-RT

No internal sensor, add an analog transmitter

Two Channel Gas Detectors

CGAS-D-CO-NO2

Carbon monoxide (CO) sensor (0 - 200 ppm) & nitrogen dioxide (NO2) sensor (0 - 10 ppm), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology (if a splash guard is required, must order Option -SN)

CGAS-D-CO-100-NO2

Carbon monoxide (CO) sensor (0 - 100 ppm) & nitrogen dioxide (NO2) sensor (0 - 10 ppm), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology (if a splash guard is required, must order Option -SN)

CGAS-D-CO-250-NO2

Carbon monoxide (CO) sensor (0 - 250 ppm) & nitrogen dioxide (NO2) sensor (0 - 10 ppm), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology (if a splash guard is required, must order Option -SN)

CGAS-D-CO-O2

Carbon monoxide (CO) sensor (0 - 200 ppm) & oxygen (O2) sensor (0 - 25% vol), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-C2H4

Carbon monoxide (CO) sensor (0 - 200 ppm) & ethylene (C2H4) sensor (0 - 200 ppm), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-H2S

Carbon monoxide (CO) sensor (0 - 200 ppm) & hydrogen sulphide (H2S) sensor (0 - 50 ppm), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-NO

Carbon monoxide (CO) sensor (0 - 200 ppm) & nitric oxide (NO) sensor (0 - 100 ppm), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-H2S-SO2

Hydrogen sulphide (H2S) sensor (0 - 50 ppm) & sulphur dioxide (SO2) sensor (0 - 20 ppm), LCD display, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, 24 VDC or VAC power, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology

CGAS-D-CO-R

Internal Carbon Monoxide (CO) sensor (0 - 200 ppm), add required ESH-A Remote Sensor

CGAS-D-NO2-R

Internal Nitrogen Dioxide (NO2) sensor (0 - 10 ppm), add required ESH-A Remote Sensor

CGAS-D-CO-RT

Internal Carbon Monoxide (CO) sensor (0 - 200 ppm), add an analog transmitter

CGAS-D-NO2-RT

Internal Nitrogen Dioxide (NO2) sensor (0 - 10 ppm), add an analog transmitter

Factory Options

-L2

Enclosure mounted (on side), strobe with audible, 40 mm / 2 in dia, 80 flashes per min, siren volume 85 dB, drip proof

-LT*

Low temperature package with OLED display and internal heater for cold environment applications down to -40°C / -40°F

-RBZ*

1 SPDT dry contact relay rated 30 volts, 2 amps max with internal audible alarm rated 90 dB @ 10 cm / 4 in

-RLY*

1 SPDT dry contact relay, rated 30 volts, 2 amps max

-RHT

RH and Temperature sensor, user selectable units DegC or DegF

-S

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

-SN

Splash Guard for sticky gas sensors (Cl2, ClO2, HCl, HCN, HF, O3, PH3) and for configurations that include an internal NO2 sensor, factory installed

Important Notes on Options

*Option -LT is not available with CGAS-D-EETO
*Options -RBZ or -RLY can be added to all single channel 4-series electrochemical toxic gas sensors
*Options -RBZ or -RLY can be added to all combustible gas, solid state or PID TVOC gas sensors
*All 4 series sticky gas models cannot have a relay or buzzer.