Air humidity meters with connectable probes

The Testo 635-2 is an instrument designed for measuring air moisture, material equilibrium moisture and pressure dewpoint in compressed air systems. Moisture characteristics can be recorded in the instrument memory and analysed and displayed in graphics or tables. Precision probes up to -60°C tpd are available to check pressure dewpoint in compressed air systems. 

• Dual Probe Measurement 

• Measurement of air moisture, material equilibrium moisture, pressure dew point 

• U - Value probe connection 

• Internal Memory 10,000 Readings 

• Dual Probe Measurement 

• Measurement of air moisture, material equilibrium moisture, pressure dew point 

• U - Value probe connection 

• Protection class IP54 

The testo 645 humidity/temperature measuring instrument automatically indicates the measurement parameters of relative humidity, absolute humidity, dew point, degree of humidity, enthalpy and temperature at the touch of a button.

• High-precision humidity measurement up to ± 1% RH

• Internal reading memory (3,000 readings)

• Convenient data evaluation via optional PC software

• Possibility of attaching a really wide range of optional probes thanks to a large accessory portfolio

Kit for carrying out measurements in storage, refrigeration and work rooms, in ventilation ducts and also on refrigeration systems and heat pumps. Keep the testo 440 air velocity and IAQ measuring instrument and the humidity/temperature probe with Bluetooth safely stowed away in the case. So you can get down to work straight away!

• Intuitive: Clearly structured measurement menus for long-term measurements and parallel determination of humidity and air temperature in storage, refrigerated, and in ventilation ducts

• Precise: calculation of dew point, wet bulb temperature and absolute humidity

• Convenient: Wireless probes, internal memory for data storage, and USB port for data export

• Versatile: Your testo 440 setup can be expanded with a large selection of digital probes