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AP1 In-Situ Carbon Probe

AP1 In-Situ Carbon Probe

Eurotherm

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The AP1 Carbon Probe is a consumable item, like a thermocouple, which is mounted with its tip in contact with the furnace atmosphere, ideally close to the working zone. The probe produces an output voltage which, in conjunction with the process temperature and atmosphere, can be interpreted in terms of the atmosphere carbon potential of the furnace. The probe is designed to be used with controllers with a high impedance input. The Eurotherm AirRef enclosure provides a continuous reference air supply to support the standard operation of the probe. The AP1 Carbon Probe is a consumable item, like

Eurotherm's own words, read from their page.

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The part other shops don't tell you. Three separate questions, kept separate on purpose, each with its source.