Eurotherm / Barber colman model: AP1 Carbon Probe is a direct and continuous carbon potential probe and can measure very low oxygen partial pressures with extreme accuracy and repeatability. It can be used to control furnace atmospheres and gas generators over a full range of carburising and hardening applications.

The Eurotherm AirRef enclosure provides a continuous reference air supply to support the standard operation of the AP1 Carbon Probe. It also provides a burn off air (purge) supply to enable the cleaning and/or maintenance of the AP1 Carbon Probe, when required.