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Testo 6721 Plastic Pressure Dewpoint Guard. Ideal for compressed air cooling driers. Avoid moisture damage by monitoring the cooling drier: Excessive moisture in compressed air results in expensive damage: ice, corrosion, material sticking together, water hammer (mechanical damage caused by accelerated water build-up), etc. A good reason for using compressed air driers.

Up to now, monitoring a "simple" compressed air cooling drier continuously was often not economical. This safety gap is now finally closed thanks to Testo 6721: The pressure dewpoint guard for everyone. Instruction manual in German and English. Testo humidity sensor with special trace humidity adjustment (polymer sensor).