Air humidity meters

The testo 608-H1 digital thermohygrometer equips you to constantly keep an eye on the indoor climate and displays the current temperature and humidity values continuously.

• Calculation and display of the dew point

• Large, clear display

• Accurate measurement of temperature

• Durable quality: capacitive humidity sensor with long-term stability for many years of measurement

The testo 625 thermohygrometer equips you for all situations where the right indoor climate is crucial, for example air temperature and relative humidity in archives, storerooms, greeenhouses and buildings. The testo 625 also calculates the dew point and wet bulb temperature quickly and accurately.

• Measures air temperature and relative humidity

• Calculates dew point and wet bulb temperature

• Displays min and max values, hold function, power off mode

• Integrated long life moisture meter for long lasting quality

The testo 608-H2 thermo hygrometer with a large, easy-to-read display to measure the air temperature,humidity and dewpoint. In addition, the visual alarm of the hygrometer indicates you when a threshold is exceeded.

• Measures and displays temperature and humidity

• Calculates and displays the dewpoint

• LED alarm is activated when thresholds are exceeded

• Long-lasting quality: long-time stable humidity sensor guarantees years of measuring

With the Testo Smart Probes VAC set, you can check air velocities, humidity, volume flows and temperatures in, on and around air conditioning systems. The robust testo Smart Case enables the measuring instruments to be conveniently transported and ensures that they are always to hand when needed.

• Easy parametrization of the outlet/duct cross-section for measuring the volume flow

• List of multiple volume flows and calculation of the total volume flow (in the log)

• Identification of mould risk thanks to the combined utilization of testo 605i and testo 805i

• Rapid image documentation with IR temperature readings and measuring spot marking

The testo 606-2 moisture meter for material moisture with relative humidity and air temperature measurement allows you to measure the moisture content in wood and building materials – and the surrounding environment too. This means that you can now also check the storage and drying conditions quickly and easily.

• Precise moisture measurements in wood and building materials

• Ideal for carrying out relative humidity and air temperature measurements to check storage and drying

• Identifying and preventing problems using dew point and wet bulb calculations

• Easy to use; backlit display for use in all lighting conditionsEasy to use; backlit display for use in all lighting conditions

The compact testo 605i temperature and humidity measuring instrument features professional measuring technology in an intelligent format: it can be used in conjunction with a smartphone/tablet and the testo Smart Probes App to reliably measure air temperature and humidity in rooms and ducts.

• Automatic calculation of the dew point and wet-bulb temperature

• Measurement data analyzed and sent via testo Smart Probes App 

• Clear identification of areas susceptible to mould via traffic light principle

The testo 622 digital hygrometer and barometer is ideal for measuring air temperature, relative humidity and air pressure at once. Aids in monitoring the ambient air, especially in laboratories during calibration or when running experimental setups.

• Measures air temperature, relative humidity and pressure

• Measurement frequency of once every ten seconds

• Alarm alerts when threshold is exceeded

• Table or wall mount

The handy testo 610 thermo-hygrometer proves to be an excellent measuring instrument when it comes to fast, precise measurement of temperature and humidity in indoor areas. In addition, the compact instrument also calculates the dew point and the wet bulb temperature as well.

• Calculation of dew point and wet bulb temperature

• Illuminated display

• Capacitive humidity sensor with long-term stability

• NTC temperature sensor provides great accuracy

The testo 605-H1 thermal hygrometer ensures reliable measurement of humidity and air temperature and calculation of the dew point. The  permanently mounted probe shaft makes it is an ideal instrument to check measurements in ventilation ducts.

• Measures relative humidity and air temperature

• Calculates the dew point

• Ideal for measurements in ventilation ducts and in rooms

• Measuring values easy to read off thanks to a pivoting display

The testo 635-2 temperature and humidity measuring instrument with its leading-edge technology and wide selection of optional sensors helps you in carrying out temperature and material moisture measurements on a variety of different materials, surfaces and environments.

• Optionally available sensors for moisture, temperature, pressure dew point and absolute pressure measurements

• 2 plug-in sensors and 3 wireless sensors can be connected

• Super-size memory for up to 10 000 readings

• USB cable and PC software for archiving and logging measuring data included

The testo 635-1 for temperature and humidity measurement with its State-of-the-art technology and large selection of probes allows you to measure temperature, air humidity and dew point – in compressed air as well.

• Measures air humidity, temperature, absolute pressure and dew point in compressed air

• Optional attachable probes

• Display of min., max. and mean values

• Cyclical printing of readings at freely adjustable intervals

The elegantly designed testo 623 hygrometer provides you with a quick and convenient means of measuring the indoor temperature and humidity in offices, living spaces and commercial premises and logs the readings over a period of 90 days.

• Alerts when room’s thresholds are reached

• Large, easy-to-read display shows current the time and date and a 90-day statistic

• Long-term stable sensor – for long-term, high-quality measurements

• Table and wall mount available

Non-contact temperature and moisture measurements –with only one device. The testo 835-H1 infrared thermometer not only measures the temperature but has an intergrated moisture sensor that allows you to measure surface moisture too.

• Measure temperature, surface moisture and dew point with only one device

• Four-Point-Laser and 50:1 Optics for precise measurements even over long distances

• Easy and comfortable to use: easy-to-follow menu guide

• Saves up to 200 readings

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

The U-value is the most important value for proving the heat loss of a building. With the testo 635-2 thermohygrometer and compatible accessories from the U-value set, determining the U-value is now easier than ever.

• Evaluate renovation measures quickly and flawlessly

• Easy probe attachment, even in inaccessible places

• Proof of service thanks to report creation 

• Integrated memory and easy evaluation with PC software

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 menu for long-term measurements as well as the parallel determination of humidity and air temperature in storage, refrigerated and work rooms and also in ventilation ducts

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

• Convenient: wireless probe, internal data storage and USB port for data export

• As multifaceted as your challenges themselves: the air velocity and IAQ measuring instrument can be expanded with a large portfolio of digital probes