0636 2140


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This product is an accessory for the following products:

Testo 645 Humidity Meter
Long-term stable, highly accurate humidity sensor, data analysis using comSoft 3

Humidity / temperature immersion / penetration probe for equilibrium moisture or for measurements in exhaust ducts to +120°C, probe Ø 12 mm x 300mm, 0 to +100 %RH, -4 to 248°F / -20 to +120°C

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

Testo Probe Connection Cables
5 or 16 foot probe connection cables for Testo 400 & Testo 645 meters