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    Gas Detection Single Channel ControllerGas Detection Single Channel Controller

Gas Detection Single Channel Controller


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The SCC Self Contained Controller combines toxic and/or combustible gas detection with basic control functionality for non-hazardous, non-explosion rated, commercial and light industrial applications.

The SCC is available in one or two channel configurations for monitoring toxic and/or combustible gas types by means of an internal electrochemical Carbon monoxide (CO) or Nitrogen dioxide (NO2) sensor and one of three ESH-A remote catalytic combustible sensors used to detect Hydrogen (H2),Propane (C3H8) or Methane (CH4). Monitoring of CO or NO2 may also be achieved remotely by combining the SCC with a 4-20 mA transmitter such as the LPT-TCO or LPT-END. The SCC also features two alarm level line voltage relays with field configurable time delays and trigger levels, a field selectable internal audible alarm and an LED panel indicating power, channel alarm status and fault conditions. Automated calibration and other maintenance procedures are simple and easily performed in the field, and our proprietary Calibration Extending Firmware (CEF) takes into account the aging of the toxic gas sensors so that less frequent calibrations are required in less-critical applications such as parking garages.

 

Features:

  • Single or dual channel operation
  • Internal or remote sensors
  • LED indicators for Power, CH1, CH2 and Fault
  • Two 5-amp SPDT dry contact relays
  • Internal audible alarm
  • Optional 4 - 20 mA input (replaces remote combustible sensor)
  • Standard water / dust tight, corrosion resistant enclosure (drip proof);
  • IP54 rated with optional splash guard installed.
  • Six conduit entry ports
  • Thermal resetting fuse
  • RoHS compliant circuit boards

 

Applications:

  • Parking Garages/Car Parks
  • Vehicle Repair Shops
  • Battery Charging Rooms
  • Buildings on Landfill Sites

 

Specificatons:

Gas Type
Carbon Monoxide (CO)    
Nitrogen Dioxide (NO2)    
Hydrogen (H2)    
Methane (CH4)    
Propane (C3H8)
Sensors
Carbon Monoxide (CO) Sensor
Type:Electrochemical
Range:0 - 200 ppm
Sensor Response Time (T90):60 seconds
Operating Temperature:-20°C to 50°C (-4°F to 122°F)
Operating Humidity:5 - 95% RH non-condensing
Operating Pressure:80 - 120 kPa
Resolution:0.5 ppm
Repeatability:< 2% of signal
Maximum Zero Shift:N/A
Clean Air Output Drift:< 10 ppm equivalent per year
Expected Life Span:6+ years in air (under normal conditions)
Calibration:Every 6 months or once a year (depending on application)
Cross Sensitivity:H2S @ 20 ppm = < 0.1 ppm
NO2 @ 10 ppm = < 0.1 ppm
Cl2 @ 10 ppm = < 0.1 ppm
NO @ 50 ppm = < 5 ppm
SO2 @ 20 ppm = < 0.1 ppm
H2 @ 20°C (68°F) @ 400 ppm = < 60 ppm
C2H4 @ 400 ppm = < 25 ppm
NH3 @ 20 ppm = < 0.01 ppm
  
Nitrogen Dioxide (NO2) Sensor
Type:Electrochemical
Range:0 - 10 ppm
Response Time (T90):< 30 seconds
Operating Temperature:-20°C to 50°C (-4°F to 122°F)
Operating Humidity:15 - 90% RH non-condensing
Operating Pressure:Atmospheric ± 10%
Resolution:0.02 ppm
Repeatability:< 2% of signal
Maximum Zero Shift:± 0.2 ppm equivalent
Clean Air Output Drift:< 2% signal loss / month
Expected Life Span:5 to 6 years in air (under normal conditions)
Calibration:Every 6 months or once a year (depending on application)
Cross Sensitivity:H2S @ 20 ppm = < -40 ppm
Cl2 @ 10 ppm = 100 ppm
NO @ 50 ppm = < 0.5 ppm
SO2 @ 20 ppm = < -2.5 ppm
CO @ 400 ppm = < 0.1 ppm
H2 @ 400 ppm = < 0.1 ppm
C2H4 @ 50 ppm = < 0.1 ppm
NH3 @ 20 ppm = < 0.1 ppm
CO2 @ 5% volume = < 0.1 ppm
  
Combustibles (CH4, H2, C3H8 ) Remote Sensor
Type:Catalytic
Range:0 - 50% LEL
Response Time (T90):< 12 seconds from 0 - 50% LEL
Operating Temperature:-10°C to 40°C (14°F to 104°F)
Operating Humidity:20 - 90% RH non-condensing
Resolution:1% LEL
Accuracy:No data available
Long Term Drift:No data available
Expected Life Span:5 years in air (under normal conditions)
Calibration:Every 6 months or once a year (depending on application)
Cross Sensitivity:Any combustible gas
  
Mechanical
EnclosureABS / Polycarbonate, rated UL94-5VA
Weight600 g (1.4 lbs)
Size10.0” x 8.6” x 4.3” (254 mm x 218 mm x 109 mm)
  
Electrical
Power RequirementLow Voltage: 16 - 30 VDC or 12 - 28 VAC, 10 W, Class 2
Line Voltage90 – 240 VAC, 50 -60 Hz
Wiring24VDC or 24VAC two-conductor shielded 18 awg stranded within conduit VAC three-conductor shielded 18 awg stranded within conduit
FuseAutomatic resetting thermal
  
Output

Low Voltage: 400 mA @ 24 VDC
LIne Voltage (110 VAC): Approximately 90 mA
LineVoltage (220 VAC): Approximately 45 mA
Two SPDT dry contact relays, rated 5 amps @ 240 VAC
Internal audible alarm, standard buzzer

 
User Interface
LED Indicators:    LED Panel indicating "POWER". "CH 1" state, "CH 2" state and "FAULT"
 
Environmental
Operating Temperature:    -20°C to 50°C (-4°F to 122°F)
Humidity:    15 - 90% RH non-condensing
 
Certifications
Conforms to: CSA-C22.2 No. 205-M1983 (R2009)
                          UL508 (Edition 17):2007
Conforms to:   EMC Directive 2004/108/EC
                          EN 50270:2006, Type 1, EN61010
Conforms to:  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.