cGas Detector Digital Transmitter
One or two channel Modbus® or BACnet® gas detector with flexible customization options and Plug & Play Smart Sensor Technology.
- 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
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), 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), Silane (SiH4), Sulphur dioxide (SO2) |
| Infrared Sensor | Carbon dioxide (CO2) |
| Catalytic Sensors | Ammonia (NH3), Hydrogen (H2), Methane (CH4), Propane (C3H8), Ethanol or Dimethyl Ether (C2H6O), Methanol (CH4O) |
| Solid State Sensors | TVOC |
| PID Sensors | TVOC |
Mechanical
| Enclosure | Black ABS / Polycarbonate, corrosion resistant, 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 18 - 22 AWG twisted, shielded, 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 and NO2 Sensor Complies with | UL2075, 2nd Edition, Standard for Gas and Vapour Detectors and Sensors |
Applications
Detected Gases
Documents
Application: AI Workload Zones & Tower Stacks - FCS and CGAS-D-IR
PDF • 3.8 MB • Application Guides
Application: Brewery - FCS and CGAS
PDF • 746 KB • Application Guides
Application: Chiller Rooms - FCS and CGAS IR
PDF • 933 KB • Application Guides
Application: Cold Storage / Freezer Rooms - FCS and CGAS
PDF • 602 KB • Application Guides
Application: Commercial Kitchen - CGAS-D-ESH-A
PDF • 984 KB • Application Guides
Application: Commercial Kitchen - CGAS-D-O3
PDF • 899 KB • Application Guides
Application: Distribution Warehouse - FCS and CGAS Detector
PDF • 908 KB • Application Guides
Application: Enclosed Parking - FCS and CGAS-D
PDF • 669 KB • Application Guides
Application: Greenhouse Production - FCS and CGAS-D CO2 CO & CH4
PDF • 2.3 MB • Application Guides
Application: Hotel Rooms - CGAS
PDF • 1.5 MB • Application Guides
Application: Hotels - FCS and CGAS IR
PDF • 503 KB • Application Guides
Application: Ice Arenas - FCS, CGAS and CXT2
PDF • 1020 KB • Application Guides
Application: Indoor Swimming Pools - FCS and CGAS CL2 O3
PDF • 942 KB • Application Guides
Application: Refrigerant Shafts - FCS and CGAS-D-IR
PDF • 750 KB • Application Guides
Application: Waste Water Treatment Plant - FCS, CGAS and CXT2
PDF • 960 KB • Application Guides
Application: Winery - FCS and CGAS
PDF • 879 KB • Application Guides
Catalog
PDF • 1.1 MB • Brochures
BTL Listing (PICS) for cGas Family
PDF • 202 KB • Certifications
CET LARR 501140 Certificate
PDF • 195 KB • Certifications
Controls Schematic: Boiler Room - Central Panel
PDF • 636 KB • Controls Schematics
Controls Schematic: Boiler Room - Central Panel
DWG • 848 KB • Controls Schematics
Controls Schematic: Boiler Room - Standalone Units
PDF • 397 KB • Controls Schematics
Controls Schematic: Boiler Room - Standalone Units
DWG • 1.1 MB • Controls Schematics
Controls Schematic: Refrigeration System - Central Panel
PDF • 801 KB • Controls Schematics
Controls Schematic: Refrigeration System - Central Panel
DWG • 1.3 MB • Controls Schematics
Controls Schematic: Refrigeration System - Standalone Units
PDF • 402 KB • Controls Schematics
Controls Schematic: Refrigeration System - Standalone Units
DWG • 1.1 MB • Controls Schematics
Controls Schematic: Vehicle Exhaust - Central Panel
DWG • 798 KB • Controls Schematics
Controls Schematic: Vehicle Exhaust - Central Panel
PDF • 624 KB • Controls Schematics
Controls Schematic: Vehicle Exhaust - Standalone Units
PDF • 331 KB • Controls Schematics
Controls Schematic: Vehicle Exhaust - Standalone Units
DWG • 981 KB • Controls Schematics
Controls Schematic: Warehouse - Central Panel
PDF • 619 KB • Controls Schematics
Controls Schematic: Warehouse - Central Panel
DWG • 803 KB • Controls Schematics
Controls Schematic: Warehouse - Standalone Units
PDF • 397 KB • Controls Schematics
Controls Schematic: Warehouse - Standalone Units
DWG • 1.1 MB • Controls Schematics
Controls Schematic: Welding Shop - Central Panel
DWG • 781 KB • Controls Schematics
Controls Schematic: Welding Shop - Central Panel
PDF • 549 KB • Controls Schematics
Controls Schematic: Wineries and Breweries - Central Panel
DWG • 791 KB • Controls Schematics
Controls Schematic: Wineries and Breweries - Central Panel
PDF • 692 KB • Controls Schematics
Calibration Clip "Cal Clip" Datasheet
PDF • 127 KB • Datasheets
cGas Detector CO2 / R744 Datasheet
PDF • 896 KB • Datasheets
cGas Detector Digital Datasheet
PDF • 758 KB • Datasheets
cGas Detector IR Refrigerant Datasheet
PDF • 284 KB • Datasheets
Splash Guard (Option -S) Datasheet
PDF • 353 KB • Datasheets
Splash Guard for Sticky Gases (Option -SN) Datasheet
PDF • 317 KB • Datasheets
Engineering Spec: California Title 24 - FCS and CGAS-D-CO-NO2
DOC • 411 KB • Engineering Specs
Engineering Spec: Refrigeration Machinery Room - FCS and CGAS-D-IR
DOCX • 384 KB • Engineering Specs
Engineering Spec: Vehicle Exhaust - FCS and CGAS-D-CO-NO2
DOCX • 382 KB • Engineering Specs
Gas Detection Schedule: Boiler Room - Central Panel
DWG • 64 KB • Gas Detection Schedules
Gas Detection Schedule: Boiler Room - Central Panel
PDF • 172 KB • Gas Detection Schedules
Gas Detection Schedule: Boiler Room - Central Panel
XLSX • 19 KB • Gas Detection Schedules
Gas Detection Schedule: Boiler Room - Standalone Units
DWG • 60 KB • Gas Detection Schedules
Gas Detection Schedule: Boiler Room - Standalone Units
XLSX • 19 KB • Gas Detection Schedules
Gas Detection Schedule: Boiler Room - Standalone Units
PDF • 170 KB • Gas Detection Schedules
Gas Detection Schedule: Refrigeration System - Central Panel
XLSX • 19 KB • Gas Detection Schedules
Gas Detection Schedule: Refrigeration System - Central Panel
DWG • 63 KB • Gas Detection Schedules
Gas Detection Schedule: Refrigeration System - Central Panel
PDF • 171 KB • Gas Detection Schedules
Gas Detection Schedule: Refrigeration System - Standalone Units
DWG • 48 KB • Gas Detection Schedules
Gas Detection Schedule: Refrigeration System - Standalone Units
XLSX • 18 KB • Gas Detection Schedules
Gas Detection Schedule: Refrigeration System - Standalone Units
PDF • 169 KB • Gas Detection Schedules
Gas Detection Schedule: Vehicle Exhaust - Central Panel
XLSX • 17 KB • Gas Detection Schedules
Gas Detection Schedule: Vehicle Exhaust - Central Panel
DWG • 61 KB • Gas Detection Schedules
Gas Detection Schedule: Vehicle Exhaust - Central Panel
PDF • 172 KB • Gas Detection Schedules
Gas Detection Schedule: Vehicle Exhaust - Standalone Units
PDF • 170 KB • Gas Detection Schedules
Gas Detection Schedule: Vehicle Exhaust - Standalone Units
XLSX • 19 KB • Gas Detection Schedules
Gas Detection Schedule: Vehicle Exhaust - Standalone Units
DWG • 53 KB • Gas Detection Schedules
Gas Detection Schedule: Warehouse - Central Panel
PDF • 172 KB • Gas Detection Schedules
Gas Detection Schedule: Warehouse - Central Panel
DWG • 63 KB • Gas Detection Schedules
Gas Detection Schedule: Warehouse - Central Panel
XLSX • 19 KB • Gas Detection Schedules
Gas Detection Schedule: Warehouse - Standalone Units
PDF • 172 KB • Gas Detection Schedules
Gas Detection Schedule: Warehouse - Standalone Units
XLSX • 19 KB • Gas Detection Schedules
Gas Detection Schedule: Warehouse - Standalone Units
DWG • 63 KB • Gas Detection Schedules
Gas Detection Schedule: Welding Shop - Central Panel
PDF • 171 KB • Gas Detection Schedules
Gas Detection Schedule: Welding Shop - Central Panel
DWG • 64 KB • Gas Detection Schedules
Gas Detection Schedule: Welding Shop - Central Panel
XLSX • 22 KB • Gas Detection Schedules
Gas Detection Schedule: Wineries and Breweries - Central Panel
PDF • 171 KB • Gas Detection Schedules
Gas Detection Schedule: Wineries and Breweries - Central Panel
XLSX • 22 KB • Gas Detection Schedules
Gas Detection Schedule: Wineries and Breweries - Central Panel
DWG • 61 KB • Gas Detection Schedules
Calibration with a Splash Guard (Option-S)
PDF • 1.2 MB • Guidelines
cGas Detector Installation Manual
PDF • 676 KB • Manuals
cGas Detector Operation Manual - firmware v2.05 onwards
PDF • 634 KB • Manuals
cGas Detector Operation Manual - up to firmware v2.04
PDF • 1.3 MB • Manuals
Internal Heater for Cold Environment Applications
PDF • 180 KB • Product Guides
Product Spec: CGAS Detector RH and Temperature Sensor (Option -RHT)
PDF • 248 KB • Product Specs
Product Spec: CGAS-D-7C2H4 Electrochemical Ethylene Sensor (7 series)
PDF • 101 KB • Product Specs
Product Spec: CGAS-D-7C2H4-1500 Electrochemical Ethylene Sensor high range (7 series)
PDF • 101 KB • Product Specs
Product Spec: CGAS-D-7CL2 Electrochemical Chlorine Sensor (7-series)
PDF • 123 KB • Product Specs
Product Spec: CGAS-D-7CL2-10 Electrochemical Chlorine Sensor (7-series)
PDF • 123 KB • Product Specs
Product Spec: CGAS-D-7CO Carbon Monoxide Electrochemical Sensor (7-series)
PDF • 101 KB • Product Specs
Product Spec: CGAS-D-7H2S Electrochemical Hydrogen Sulphide Sensor (7 series)
PDF • 126 KB • Product Specs
Product Spec: CGAS-D-7HCL Electrochemical Hydrogen Chloride Sensor (7 series)
PDF • 102 KB • Product Specs
Product Spec: CGAS-D-7HCN Electrochemical Hydrogen Cyanide Sensor (7-series)
PDF • 103 KB • Product Specs
Product Spec: CGAS-D-7NH3 Electrochemical Ammonia Sensor (7 series)
PDF • 101 KB • Product Specs
Product Spec: CGAS-D-7O3 Electrochemical Ozone Sensor (7 series)
PDF • 103 KB • Product Specs
Product Spec: CGAS-D-C2H4 Electrochemical Ethylene Sensor
PDF • 101 KB • Product Specs
Product Spec: CGAS-D-CC2H6O-100 Ethanol Catalytic Combustible Sensor
PDF • 103 KB • Product Specs
Product Spec: CGAS-D-CC3H8-100 Catalytic Propane Sensor
PDF • 103 KB • Product Specs
Product Spec: CGAS-D-CC4H10-100 Catalytic Butane Sensor
PDF • 103 KB • Product Specs
Product Spec: CGAS-D-CCH4-100 Catalytic Methane Sensor
PDF • 103 KB • Product Specs
Product Spec: CGAS-D-CCH4O-100 Methanol Catalytic Combustible Sensor
PDF • 120 KB • Product Specs
Product Spec: CGAS-D-CH2-100 Catalytic Hydrogen Sensor
PDF • 121 KB • Product Specs
Product Spec: CGAS-D-CH2O Formaldehyde Electrochemical Sensor
PDF • 113 KB • Product Specs
Product Spec: CGAS-D-CL2 Chlorine Electrochemical Sensor
PDF • 152 KB • Product Specs
Product Spec: CGAS-D-CL2-10 Chlorine Electrochemical Sensor
PDF • 152 KB • Product Specs
Product Spec: CGAS-D-CO Carbon Monoxide Electrochemical Sensor (standard)
PDF • 100 KB • Product Specs
Product Spec: CGAS-D-CO-NO2 Carbon Monoxide and Nitrogen Dioxide Electrochemical Sensors
PDF • 104 KB • Product Specs
Product Spec: CGAS-D-CO-RHT Carbon Monoxide Electrochemical Sensor and RH and Temperature Sensor
PDF • 498 KB • Product Specs
Product Spec: CGAS-D-CO2-100% Carbon Dioxide NDIR Sensor
PDF • 179 KB • Product Specs
Product Spec: CGAS-D-CO2-2K Carbon Dioxide NDIR Sensor
PDF • 119 KB • Product Specs
Product Spec: CGAS-D-CO2-5% Carbon Dioxide NDIR Sensor
PDF • 119 KB • Product Specs
Product Spec: CGAS-D-CO2-5K Carbon Dioxide NDIR Sensor
PDF • 119 KB • Product Specs
Product Spec: CGAS-D-EH2 Hydrogen Electrochemical Sensor
PDF • 138 KB • Product Specs
Product Spec: CGAS-D-F2 Electrochemical Fluorine Sensor
PDF • 103 KB • Product Specs
Product Spec: CGAS-D-H2S Electrochemical Hydrogen Sulphide Sensor
PDF • 127 KB • Product Specs
Product Spec: CGAS-D-HCL Hydrogen Chloride Electrochemical Sensor
PDF • 118 KB • Product Specs
Product Spec: CGAS-D-HF Hydrogen Fluoride Electrochemical Sensor
PDF • 174 KB • Product Specs
Product Spec: CGAS-D-ICH4 Methane Infrared Sensor
PDF • 134 KB • Product Specs
Product Spec: CGAS-D-IR Infrared Refrigerant Sensors
PDF • 136 KB • Product Specs
Product Spec: CGAS-D-IR123 Infrared Refrigerant Sensor
PDF • 142 KB • Product Specs
Product Spec: CGAS-D-IR32-100 A2L Infrared Refrigerant Sensor
PDF • 135 KB • Product Specs
Product Spec: CGAS-D-IR454B-100 A2L Infrared Refrigerant Sensor
PDF • 135 KB • Product Specs
Product Spec: CGAS-D-NH3-3% Catalytic Ammonia Sensor
PDF • 113 KB • Product Specs
Product Spec: CGAS-D-NO Electrochemical Nitric Oxide Sensor
PDF • 121 KB • Product Specs
Product Spec: CGAS-D-NO2 Electrochemical Nitrogen Dioxide Sensor
PDF • 121 KB • Product Specs
Product Spec: CGAS-D-O2 Electrochemical Oxygen Sensor
PDF • 106 KB • Product Specs
Product Spec: CGAS-D-O3 Electrochemical Ozone Sensor
PDF • 138 KB • Product Specs
Product Spec: CGAS-D-RHT RH and Temperature Sensor
PDF • 110 KB • Product Specs
Product Spec: CGAS-D-SO2 Electrochemical Sulphur Dioxide Sensor
PDF • 138 KB • Product Specs
Product Spec: CGAS-D-SPH High Range TVOC PID Sensor
PDF • 131 KB • Product Specs
Product Spec: CGAS-D-SPL Low Range TVOC PID Sensor
PDF • 131 KB • Product Specs
Product Spec: CGAS-D-VLT-NH3-S Catalytic Ammonia Sensor
PDF • 113 KB • Product Specs
Product Spec: CGAS-DP-CCH4-100 Catalytic Methane Sensor
PDF • 122 KB • Product Specs
Product Spec: CGAS-DP-CH2O Formaldehyde Electrochemical Sensor
PDF • 122 KB • Product Specs
Product Spec: CGAS-DP-CO Carbon Monoxide Electrochemical Sensor (standard)
PDF • 123 KB • Product Specs
Product Spec: CGAS-DP-CO2-2K Carbon Dioxide NDIR Sensor
PDF • 119 KB • Product Specs
Product Spec: CGAS-DP-CO2-5% Carbon Dioxide NDIR Sensor
PDF • 119 KB • Product Specs
Product Spec: CGAS-DP-CO2-5K Carbon Dioxide NDIR Sensor
PDF • 119 KB • Product Specs
Product Spec: CGAS-DP-SPH High Range TVOC PID Sensor
PDF • 120 KB • Product Specs
Product Spec: CGAS-DP-SPL Low Range TVOC PID Sensor
PDF • 120 KB • Product Specs
ChillerSense Solution Guide
PDF • 2.7 MB • Compliance Guides
ParkSense Solution Guide
PDF • 2.7 MB • Compliance Guides
cGas Modbus Holding Registers
PDF • 299 KB • Technical References
Wiring Diagram: CGAS-D with Remote CGAS-A
PDF • 678 KB • Wiring Diagrams
Wiring Diagram: CGAS-D with Remote ESH-A
PDF • 214 KB • Wiring Diagrams
Wiring Diagram: CGAS-SC (low voltage) with Option 2AO
PDF • 453 KB • Wiring Diagrams
Wiring Diagram: FCS-32-B-L with CGAS-D-NH3
PDF • 872 KB • Wiring Diagrams
Wiring Diagram: FCS-32-M-L with CGAS-D-NH3
PDF • 862 KB • Wiring Diagrams
Wiring Diagram: FCS-B with CGAS-D and RPS-24VDC
PDF • 497 KB • Wiring Diagrams
Wiring Diagram: FCS-M with CGAS-D and RLY-4
PDF • 487 KB • Wiring Diagrams
Wiring Diagram: FCS-M with CGAS-D and RSH-24V-R
PDF • 442 KB • Wiring Diagrams
Video Library
How Does the Splash Guard (Option-S) Work
CET Part Numbers Presentation
ASK THE EXPERTS - Gas Detection System: How It Works
ASK THE EXPERTS - Gas Detection System: Your Design
ASK THE EXPERTS - Gas Detector: How it Works
ASK THE EXPERTS - Gas Detector: Mounting Locations
ASK THE EXPERTS - Gas Detector: Sensor Coverage
ASK THE EXPERTS - Gas Detector: Mounting Considerations
ASK THE EXPERTS - Gas Detection System: Interaction with VFD Fans
Related Products
Metal Protective Guards
A heavy duty metal guard that is installed over the gas detector or controller. Helps protect the gas detection equipment against impact, abrasive damage, theft and vandalism.
Calibration Kits
The complete Calibration Kit contains the items necessary for common field and shop calibration. Smaller kits are available if not all items are required. Choose the calibration kit that gives you the tools you need for calibration.
Calibration Gases
Cylinders of zero air and span gas for calibration
Splash Guard (Option -S)
Protects sensor from water, dust and dirt; factory installed over the sensor vent, IP54 rating. Recommended for gas detectors installed in wash down or wet environments.
PRU-24-A Sample Draw Pump Unit
Connects to a gas detector and draws samples of air into the gas detector from hard to access locations such as shafts, tall ceilings, wells, pits, small rooms, etc. Uses a pump to pull sample air through a length of tube into the gas detector, across the sensor and exhaust it from the outlet port.
RSH-24V Remote Strobe & Horn
Two alarm features in one safety device, mounting fixture not included. Available in 3 different lens colours, combines a visual and an audible alarm feature into one compact, low profile device.
Cal Clip Calibration Adapter
Clips around the circular, black splash guard that is factory installed at the time of order on any CET black enclosure gas detectors or self-contained controllers. A removable adapter that allows the use of both hands during calibration.
Splash Guard for Sticky Gases (Option -SN)
Protects sticky gas sensor from water, dust and dirt. Recommended for gas detectors with sticky gas sensors installed in wash down or wet environments.
Certificate of Sensor Calibration
Provides detailed sensor calibration information. A Certificate of Sensor Calibration is available for customers who require detailed calibration information.
FCS Multi Channel System Controllers
High performance controller with logic and priority settings for monitoring toxic, combustible and refrigerant gases with versatile control functionality. Available with Modbus® or BACnet® communication with BAS, supports 4-20 mA and Modbus® driven VFDs.
cGas-SC Self-Contained Controller
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ESH-A Remote Sensor
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LPT Low Power Transmitter
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Replacement Sensors for cGas Product Line
Replacement Plug & Play Smart Sensor Boards for CGAS-A, CGAS-D, CGAS-AP, CGAS-DP, CGAS-SC and CGAS-SD models. Gas sensors have a lifespan which means they expire and need to be replaced.