• Gas Detection Dual Channel Controller

Gas Detection Dual Channel Controller

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The DCC Dual Channel Controller is a comprehensive and dependable, self-contained system that offers one or two channel configurations for monitoring toxic, combustible and solid state refrigerant gases with straight-forward control functionality for non-hazardous, non-explosion rated, commercial and light industrial applications.

Sensor configurations include, two internal electrochemical sensors (one must be CO),or one internal electrochemical and one remote catalytic or remote solid state sensor or a remote 4-20 mA transmitter. Field configurable settings are done through an easy to navigate, comprehensive menu structure. Other features include two 4 - 20 mA outputs with VFD control, a configurable 4 - 20 mA input, two alarm level line voltage, two SPDT dry contact relays with field configurable time delays and trigger levels, a field selectable integral audible alarm and an LCD digital display with LED indicators for channel alarm status and fault conditions. 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 toxic gas sensors so that less frequent calibrations are required.


Key featuresApplications
  • Single or dual channel operation
  • Flexible internal and/or remote sensor configurations
  • 2x16 character LCD display with LED indicators
  • Two 5-amp SPDT dry contact relays
  • Two 4- 20 mA outputs with VFD control
  • One configurable 4 - 20 mA input
  • Optional loud or water tight, door mounted buzzer
  • Thermal resetting fuses
  • Standard water / dust tight, corrosion resistant enclosure (drip proof);
  • IP54 rated with optional splash guard installed
  • Parking Garages with VFD control
  • Indoor Commerical Swimming Pools
  • Firehalls
  • Ice Arenas
  • Wineries
  • and many more


Technical specifications
Gas Type
Electrochemical (internal)Carbon Monoxide (CO),Nitrogen Dioxide (NO2),
Nitrogen Oxide (NO),Oxygen (O2),Hydrogen Sulphide
(H2S),Ethylene (C2H4),Sulphur Dioxide, (SO2)
Refrigerants (remote)R22, R134A, R402A, R404A, R407C, R410A, R422D,
Hydrogen (H2),Methane (CH4),
Propane (C3H8)
TVOCs (solid state) (remote) 
EnclosureABS / Polycarbonate, rated UL94-5VA; IP54 rated
with splash guard installed. Copper coated interior
to reduce RF interference.
Weight600 g (1.4 lb)
Size10.0” x 8.6” x 4.3”
(254 mm x 218 mm x 109 mm)
User Interface 
Display2x16 character LCD digital display with LED Panel
indicating “CH1” state, “CH2” state, and FAULT”
“SILENCE” Push ButtonTemporarily clears buzzer / latched relays
Input / Output 
Input4-20 mA analog
OutputTwo 4-20 mA analog with VFD control
RelaysTwo SPDT dry contact relays,
rated 5 amps @ 240 VAC
Audible Alarm- Standard internal buzzer
- Optional loud, door mounted buzzer, rated 90 dB @ 30 cm
- Optional water tight, door mounted buzzer, rated 85 dB @ 2 ft
Power RequirementLow Voltage : 16 - 30 VDC or 12 - 28 VAC, 10 W, Class 2
Line Voltage : 90 - 240 VAC, 50 - 60 Hz
Current DrawLow Voltage : 400 mA @ 24 VDC (400 mA RMS @ 24 VAC)
Line Voltage (110 VAC) : Approximately 90 mA
Line Voltage (220 VAC) : Approximately 45 mA
WiringLow Voltage : 24 VDC or 24 VAC two-conductor shielded;
Line Voltage : VAC three-conductor shielded 
DistanceMaximum 200 ft between DCC controller and ESH-A Remote Sensor using minimum 18 gauge wire stranded within conduit. Reference the manual for maximum distances to maintain for remote 4-20 mA transmitters.
FusesAutomatic resetting thermal
Operating Temperature-40°C to 50°C (-40°F to 122°F)
Humidity15 - 90% RH non-condensing
Conforms to:CSA-C22.2 No. 205-M1983 (R2009)
UL508 (Edition 17):2007
Conforms toEMC Directive 2004/108/EC
EN 50270:2006, Type 1, EN61010
Conforms toFCC. This device complies with Part 15 of the FCC Rules


Product codes

Find the Type and follow the instructions to add the sensor from the appropriate [GROUP] to build the DCC package you require:

Type A: Single Channel (Internal Electrochemical Sensor) Choose 1 internal sensor from [GROUP 1]. Part number is DCC-A + part number listed in [GROUP 1].

Type B1: Single Channel (Remote 4 - 20 mA Transmitter) No internal sensor. Choose 1 remote transmitter from [GROUP 2]. Part number is DCC-B-RT + transmitter part number.

Type B2: Single Channel (ESH-A Remote Sensor -Solid State) No internal sensor. Choose 1 remote ESH-A sensor from [GROUP 3]. Part number is DCC-B-R +part number listed in [GROUP 3].

Type B3: Single Channel (ESH-A Remote Sensor - Catalytic) No internal sensor. Choose 1 remote ESH-A sensor from [GROUP 4]. Part number is DCC-B-R +part number listed in [GROUP 4].

Type D1: Dual Channel (Internal Electrochemical Sensor + Remote 4-20 mA Transmitter) Choose 1 internal sensor from [GROUP 1] and 1 remote transmitter from [GROUP 2]. Part number is DCC-D-RT+part number listed in [GROUP 1] + transmitter part number.
Type D2: Dual Channel (Internal Electrochemical Sensor + ESH-A Remote Sensor - Solid State) Choose 1 internal sensor from [GROUP 1] and 1 ESH-A remote sensor from [GROUP 3]. Part number is DCC-D-R +part number listed in [GROUP 1] + [GROUP 3].
Type D3: Dual Channel (Internal Electrochemical Sensor + ESH-A Remote Sensor - Catalytic) Choose 1 internal sensor from [GROUP 1] and 1 ESH-A remote sensor from [GROUP 4]. Part number is DCC-D-R +part number listed in [GROUP 1] + [GROUP 4].
Type E: Dual Channel (Internal Electrochemical Sensors) Comes with 1 internal CO sensor. Choose second internal sensor from [GROUP 1]. Part number is DCC-ETCO + part number listed in [GROUP 1].