The Combustible Gas Sensor type R61-0203-02RK, for diffusion sensing, is a highly reliable catalytic style sensor which is designed to give extended service even under extreme conditions.  Arguably the most robust catalytic Combustible sensor on the market, this sensor will typically last 3-7 years.

without kit


  • Long life – 3 to 5 years
  • Increased stability
  • Stainless steel case
  • Retro fits all existing installations
  • New duct mount feature
  • SAA Approved
  • 3-Wire


  • Petrochemical plants
  • Power stations
  • Telephone exchanges
  • Boiler rooms
  • Refineries
  • Aerosol manufacturers
  • Paint manufacturers
  • Mining
  • Battery rooms

The R61-0203-02RK Sensor configuration consist of a sensor and a mechanical protector.  The combination palladium/platinum catalyst resists destruction by combustible gas levels above 100% LEL, and lead and sulphur compounds.

The sensor is enclosed in a 316 stainless steel shell and 316 sintered stainless steel flame arrestor, which is teflon coated. The stainless steel ensures high corrosion resistance, and the teflon covering on the flame arrestor resists the accumulation of dirt and dust. It should be realised that the sensor elements themselves are susceptible to breakage by shock and therefore the sensor should not be roughly handled prior to its installation.

The R61-0203-02RK Combustible Sensor has a unique design feature which allows the mechanical protection (bell end) to be removed from the sensor. This allows the sensor to be easily duct mounted. For connection to a Beacon controller, an amplifier board is required.

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