SBH-2 Industrial Grade Propane Sensors

The SBH-2 is an industrial rated NDIR Propane sensor in a robust stainless steel housing with an expanded temperature range and a fast response time.
This sensor is ideal for safety and alarming devices as well as environmental monitoring applications.


  • Ex Rated Versions Available
  • Long Lifespan 10+ years
  • Maintenance Free - Automatic Baseline Calibration (ABC)
  • Temperature and Humidity Compensation Throughout The Entire Measurement Range
  • Superior Stability & Accuracy



Accuracy ‘+/-0.1% vol
Resolution 0.01%
Measurement Range 0 to 2% Volume in Air
Temperature Range ‘-40˚F to 158˚F (-40˚C to 70˚C)
Humidity Range 0 to 95% RH
Supply Voltage 3.3-6.0VDC
Supply Current 55-60mA
Communication Interfaces UART
Weight 18g
Life Expectancy >10 years


Operating Principle

Single Channel Non-Dispersive Infrared (NDIR) Sensors

NDIR sensors leverage Lambert-Beer’s law that states certain gasses exhibit absorption characteristics at a specific infrared wavelength.

Single Channel NDIR sensors use an single infrared light source and a single IR detector “tuned” to the specific wavelength for the target gas. The IR light is passed through an optical bench that “folds” the light within the optical bench to create a long optical path length – providing high accuracy and resolution when measuring the target gas.

As the target gas concentration increases, the amount of received IR light at the IR detector decreases, this relationship is converted to a PPM measurement within the sensor.


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