cGas-SC Self-Contained Controller

A self contained controller with up to 3 gas channels, Plug & Play Smart Sensor Technology and configurable logic control and priority settings

Offers superior user customization and reliable gas detection performance for monitoring Carbon monoxide, Nitrogen dioxide, Nitric oxide, Oxygen, Hydrogen sulphide, Ethylene, Sulphur dioxide, Hydrogen, Methane, Propane, TVOCs and Refrigerants

Applications

  • Parking Facilities
  • Vehicle Repair Shops
  • Greenhouse Production
  • Refrigeration/Chiller Rooms
  • Wineries/Breweries
  • Ice Arenas
  • Swimming Pools
  • Battery Charging Rooms
  • Manufacturing Plants
  • Maintenance Facilities
  • and many more...

Key Features

  • Up to 3 gas channels with flexible internal and / or remote sensor configurations
  • Pre-calibrated Plug & Play Smart Sensor replacement at end of life
  • 2x16 character LCD display with LED indicators
  • Easy access push buttons on the front of the enclosure for configuration and calibration
  • 24 VDC or VAC power (ground reference), optional line voltage
  • Field configurable BACnet® MS/TP RS-485 or Modbus® RTU RS-485 digital output signal to controller or BAS
  • User selectable 4 - 20 mA outputs, 0 - 10V or 2 - 10V output (optional)
  • Two SPDT dry contact relays 5A @240 VAC
  • USB port for configuration changes and firmware upgrades
  • Standard water / dust tight, corrosion resistant enclosure (drip proof); IP54 rated with optional splash guard installed
  • Optional low temperature operation package
  • Optional RH & Temperature sensor
  • Optional side mounted strobe
  • Optional factory installed splash guard
  • Optional side mounted extra loud or water tight buzzer
  • Sensor Calibrating Extending Firmware (CEF) for enclosed parking applications
  • RoHS compliant circuit boards

Description

The CGAS-SC Self-Contained Controller is a versatile gas detector that offers up to 3 channels for monitoring toxic, combustible and refrigerant gases in commercial and light industrial, non-hazardous (non-explosion rated) environments.

It can be used as a standalone monitoring device or part of a larger gas detection system. It accepts 4-20 mA analog inputs and all models feature field configurable BACnet® or Modbus® output for communicating with a controller or a BAS.

Sensor configurations include combinations of internal and/or remote sensors, including 3 remote or 1 internal + 2 remote sensors. Plug & Play Smart Sensor technology makes replacing the pre-calibrated sensors quick and easy.

Standard features include two high voltage SPDT dry contact relays with field configurable time delays and trigger levels, one horn and strobe connection, a field selectable internal audible alarm, an LCD display with LED indicators for channel alarm status and fault conditions and an intuitive menu system with password protection. Enhanced logic control with 8 priorities/zoning capabilities allows flexibility in configuration and operation.

Specialized optional features include, line voltage power supply, two 4 - 20 mA outputs that can be used for VFD control, RH and temperature monitoring, low temperature operation, side mounted strobe, extra loud or water tight side mounted buzzer and wash-down / water spray protection.

Target Gas
Electrochemical Sensors
Carbon monoxide, Ethylene (C2H4), Chlorine (Cl2), Hydrogen sulphide (H2S), Nitric oxide (NO), Nitrogen dioxide (NO2), Oxygen (O2), Sulphur dioxide (SO2)
Infrared Sensors
Carbon dioxide (CO2)
Catalytic Sensors (remote only)
Any ESH-A Remote Sensor or CGAS-A Methane, Propane or Hydrogen gas detector
PID Sensors (remote only)
Any ESH-A Remote Sensor or CGAS-A TVOC
Refrigerants Sensors (remote only)
Any CGAS-A or CGAS-AP infrared or solid state refrigerant gas detector
Mechanical
Enclosure
Black ABS / Polycarbonate, corrosion resistant, IP54 rated with standard splash guard installed (Option -S)
Weight
750 g / 1.65 lbs
1 kg / 2.2 lbs (with line voltage)
Size
20.3 x 15.4 x 8 cm
8 x 6.07 x 3.16 in
User Interface
Display
LCD display 2 x 16 characters with LED panel indicating alarm status 1, 2 and 3 for any channel and FAULT
Push Button
Initiate calibration and menu options with UP, DOWN and ENTER push buttons
USB Port
Internal port for USB memory stick for configuration changes and firmware upgrades
Input / Output
Input
4 - 20 mA analog
Output
Up to two analog outputs for VFD control, jumper selectable current or voltage (4 - 20 mA, 0 - 10 V, 2 - 10 V, etc.)
User selectable BACnet® MS/TP (version 1 rev 14) RS-485 or Modbus® RTU (version 1.1b3) RS-485
Relay
2 internal SPDT dry contact relays, rated 5 amps @ 240 VAC
Audible Alarm
Standard internal buzzer, rated 76 dB @ 3 m (10 ft)
Optional loud, side mounted buzzer, rated 90 dB @ 30 cm (1 ft)
Optional water tight, side mounted buzzer, rated 85 dB @ 60.96 cm (2 ft)
Temporal 4 sound pattern
Horn / Strobe
Horn/strobe output terminal
Optional factory installed side mounted strobe with audible, 40 mm / 2 in dia (Option -L2)
Note: not IP54 with Option -L2 installed
RH & Temperature
User selectable (°C or °F) RH & Temp sensor (optional)
Electrical
Power Requirement
Low Voltage (standard): 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2
Line Voltage (optional): 90 - 240 VAC, 50 - 60 Hz, 10 W max
Wiring
Low Voltage (standard): 24 VDC or 24 VAC 2-conductor, 18 awg stranded within conduit
Line Voltage (optional): VAC 3-conductor (Line, Neutral, Protective Earth Ground), 18 awg stranded within conduit
Digital Communication: 4-conductor, 16 AWG, stranded within conduit
Fuse(s)
Thermal, resetting
Environmental
Operating Temperature
0°C to 40°C (32°F to 104°F)
temperatures below 0°C / 32°F require low temperature package (Option-LT)
Operating Humidity
15 - 95% RH non-condensing
Certifications
Conforms to:
CSA-C22.2 No 61010-1, UL 61010-1 (Edition 3)
Listed by BTL
RoHS compliant circuit boards
CO and NO2 Sensor Complies with
UL2075, 2nd Edition, Standard for Gas and Vapour Detectors and Sensors
Product Codes
No Internal Sensors - All Remote Sensors
CGAS-SC-RS
Single channel, no internal sensor (add one ESH-A remote sensor or analog transmitter), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure
CGAS-SC-2RS
Dual channel, no internal sensor (add ESH-A remote sensors and/or analog transmitters, max 2), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure
CGAS-SC-3RS
Three channel, no internal sensor (add ESH-A remote sensors and/or analog transmitters, max 3), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure
4 Series Electrochemical Gas Sensors
CGAS-SC-CO
Single channel, internal electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range), UL2075 approved sensor, LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CL2
Single channel, internal electrochemical carbon monoxide (Cl2) sensor (0 - 5 ppm range), UL2075 approved sensor, LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-H2S
Single channel, internal electrochemical hydrogen sulphide (H2S) sensor (0 - 50 ppm range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-NO
Single channel, internal electrochemical nitric oxide (NO) sensor (0 - 100 ppm range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-NO2
Single channel, internal electrochemical 6-year nitrogen dioxide (NO2) sensor (0 - 10 ppm range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-O2
Single channel, internal electrochemical oxygen (O2) sensor (0 - 25% volume range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-SO2
Single channel, internal electrochemical sulphur dioxide (SO2) sensor (0 - 20 ppm range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
7 Series Electrochemical Gas Sensors
CGAS-SC-7CO
Single channel, internal electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-7C2H4
Single channel, internal ethylene (C2H4) sensor (0 - 200 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-7H2S
Single channel, internal hydrogen sulphide (H2S) sensor (0 - 50 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-7NO2
Single channel, internal electrochemical nitrogen dioxide (NO2) sensor (0 - 10 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
Infrared Sensors
CGAS-SC-CO2-5%
Single channel, internal infrared carbon dioxide (CO2) sensor (0 - 5% vol), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CO2-5K
Single channel, internal infrared carbon dioxide (CO2) sensor (0 - 5,000 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CO2-10K
Single channel, internal infrared carbon dioxide (CO2) sensor (0 - 10,000 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CO2-20K
Single channel, internal infrared carbon dioxide (CO2) sensor (0 - 20,000 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
-RS
Add -RS to any 4 series, 7 series or infrared sensor model numbers above for one internal channel and add one ESH-A Remote sensor or analog transmitter for a dual channel system.

Add -RS to any dual channel model numbers below for two internal channels and add one ESH-A Remote sensor or analog transmitter for a three channel system.
-2RS
Add -2RS to any 4 series or infrared sensor model numbers above for one internal channel and add ESH-A Remote sensors and/ or analog transmitters, max 2 for a three channel system. NOTE: 7 series models cannot have two remote sensors
CGAS-SC-CO-NO2
Dual channel, internal electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range) and internal electrochemical nitrogen dioxide (NO2) sensor (0 - 10 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CO-O2
Dual channel, internal electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range) and internal oxygen (O2) sensor (0 - 25% volume), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CO-C2H4
Dual channel, internal electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range) and internal ethylene (C2H4) sensor (0 - 200 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CO-H2S
Dual channel, internal electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range) and internal hydrogen sulphide (H2S) sensor (0 - 50 ppm), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-CO-NO
Dual channel, internal electrochemical carbon monoxide (CO) sensor (0 - 200 ppm range) and internal electrochemical nitric oxide (NO) sensor (0 - 100 ppm range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
CGAS-SC-H2S-SO2
Dual channel, internal hydrogen sulphide (H2S) sensor (0 - 50 ppm) and internal electrochemical sulphur dioxide (SO2) sensor (0 - 20 ppm range), LCD display with LED indicators, audible alarm, field configurable Modbus® RTU RS-485 or BACnet® MS/TP output, two 5A @ 240 VAC SPDT relays, low voltage 16 - 30 VDC or 12 - 28 VAC, 10 W max, Class 2, black ABS/PC water / dust tight enclosure, plug & play smart sensor technology
Factory Options
2AO
Two analog outputs, supports VFD control, jumper selectable 4-20 mA, 0-10 volts or 2-10 volts output. Cannot be added to three gas channel models.
-A
Side mounted, loud buzzer, rated 90 dB @ 30 cm / 1 ft
-L2
Side mounted strobe, red lens, IP65 rated, 6.1 cm dia x 13 cm H / 2.4 in dia x 5.2 in H)
-LT
Low temperature package with OLED display and internal heater for cold environment applications down to -40°C / -40°F
-RHT
RH & Temperature sensor (°C or °F) (not available with all models)
-S
Splash Guard, factory installed, IP54 rating
-SN
Splash Guard for configurations with internal NO2 sensor
-WA
Door mounted, water tight audible alarm, rated 85 dB @ 60.96 cm / 2 ft
Remote Sensors
ESH-A-CH2-100
Catalytic Hydrogen (H2) remote sensor (0 - 100% LEL), water / dust tight enclosure 
ESH-A-CCH4-100
Catalytic Methane (CH4) remote sensor (0 - 100% LEL), water / dust tight enclosure 
ESH-A-CC3H8-100
Catalytic Propane (C3H8) remote sensor (0 - 100% LEL), water / dust tight enclosure 
ESH-A-SPL
PID TVOC remote sensor (0 - 30 ppm), water / dust tight enclosure 
ESH-A-SPH
PID TVOC remote sensor (0 - 300 ppm), water / dust tight enclosure 
Compatible Analog (4-20 mA) Transmitters
CGAS-A Detector Models
Single channel analog gas detectors for monitoring many different toxic, combustible or refrigerant gases
CGAS-AP Public Space Models
Single channel analog gas detectors for monitoring toxic, combustible or refrigerant gases in public space applications
LPT Low Power Models
Single channel analog gas detectors for monitoring carbon monoxide, nitrogen dioxide, ammonia, chlorine, ozone or oxygen
CXT2-A Models
Single channel, analog explosion proof gas detectors for monitoring toxic or combustible gases in hazardous-rated areas

Options, Accessories and More...