How long do gas sensors last?

How long do gas sensors last?

The majority of the sensors employed by Forensics Detectors are electrochemical cell technology that have a life expectancy from 2 - 3 years. Some unique cells, can last up to 6 to 10 years. Make sure to check the specifications of your product. However, some of our products employ different sensor technology. For example: 

  • Carbon Dioxide (CO2) gas sensors employ solid state Non Dispersive Infra-Red (NDIR) technology. These sensors last up to 10 years.
  • Combustible gas such as natural gas, methane, propane and hydrocarbons employ semiconducting metal oxide sensors. These sensors last up to 10 years.
  • Catalytic Bead sensors used to measure natural gas, methane, propane and hydrocarbons  EX %LEL. These sensors last up to 4 years.

Many factors can affect the performance of gas  sensors. The life and/or performance of gas detection sensors are affected by:

  • Temperature (most sensors will respond to temperature changes)

  • Humidity (most sensors will response to humidity changes)

  • Interfering gases (cross-sensitivity arising in a error signal)

  • Physical factors, e.g. excessive vibration or impact

  • Contamination or damage to the sensor e.g. by incorrect cleaning products, or by exposing the sensor to very high concentrations of gas

  • Exposure to poisoning/inhibiting compounds and chemicals

The first rule for keeping sensors safe and in good working order is to undertake regular maintenance. This should include scheduled bump testing (also known as a gas or functional test) and calibration. The only sure-fire way to know a sensor is working correctly is through application of the target gas(es) in bump testing/calibration.

If you have any questions or do not understand these concepts, please review our tutorials and explanation videos on our YouTube channel or reach out to us via email and we will direct you to the right information.