The FT90 is suitable for the measurement of humidity and temperature in neut-ral gaseous media. Optionally, the device can be used to measure the pressure,negative pressure, or differential pressure of neutral gaseous media. Note the specifications in the technical data with regard to media compatibility. Devices with the order code FT90#######0#000R1## are classified as electrical equipment for use in potentially explosive areas zone 2 (gases and vapours) and/or zone 22 (dusts).
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