SRH-1 Industrial Grade CO2 Sensors

The SRH-1 is an industrial rated NDIR CO2 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 agricultural and environmental monitoring applications.

Features

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

Description

Specifications

Accuracy ‘+/-25ppm or 10% of reading
Resolution ‘1ppm
Measurment Range 0 to 10,000ppm
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

Dimensions

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 specifc 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 measurment within the sensor.

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