testo 605i - Thermohygrometer operated via smartphone

  • Measurement of air humidity and temperature in rooms and ducts
  • Automatic calculation of the dew point and wet bulb temperature via testo Smart Probes App
  • Measurement data analysed and sent via testo Smart Probes App
  • Problem-free application at measuring points that are a long distance apart thanks to Bluetooth® range up to 100 m

The compact testo 605i temperature and humidity measuring instrument  with bendable probe head 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.

testo 0560 2605 02

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In addition to measuring air temperature and relative humidity in rooms and ducts, the thermohygrometer is also suitable for checking air conditioning system humidifiers. When you use the testo 605i in conjunction with the testo 805i infrared thermometer, you can clearly identify areas susceptible to mould via the traffic light principle, with the assistance of a measurement menu that is already stored in the App.

Measure more efficiently using the App

The testo 605i wirelessly transmits the measurement data via Bluetooth to your own smartphone or tablet. With the testo Smart Probes App installed on your terminal device, you can view your readings conveniently. The app also enables the dew point and wet bulb temperature to be determined automatically. All measurement data are presented either as a diagram or a table. Finally, the measurement data report can be e-mailed directly as a pdf or Excel file.

*Our tip: Use the testo 605i as a probe in conjunction with the appropriate IAQ measuring instrument from Testo.

Includes: 1 x testo 605i thermohygrometer operated via smartphone, including batteries and calibration protocol.

Temperature - NTC
Measuring range
                            -20 to +60 °C
                            ±0.8 °C (-20 to 0 °C)
                            ±0.5 °C (0 to +60 °C)
                            0.1 °C


Humidity - Capacitive
Measuring range
                            0 to 100 %RH
                            ±3.0 %RH (10 to 35 %RH) (at +25°C)
                            ±2.0 %RH (35 to 65 %RH) (at +25°C)
                            ±3.0 %RH (65 to 90 %RH) (at +25°C)
                            ±5 %RH (< 10  or > 90 %RH)
                            0.1 %RH


General technical data
                            86.4 g
                            243 x 30 x 24 mm
Operating temperature
                            -20 to +50 °C
Product-/housing material
System requirements
                            requires iOS 8.3 or newer; requires Android 4.3 or newer; requires mobile end device with Bluetooth 4.0
Product colour
Battery type
                            3 AAA micro batteries
Battery life
                            150 h
Length probe shaft
                            100 mm
Data transfer
Radio range
Storage temperature
                            -20 to +60 °C

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