testo 625 – Digital Thermohygrometer with App Connection
Designed for fast, reliable assessment of indoor climate conditions, the testo 625 is a compact digital thermohygrometer for professional measurement of air temperature and relative humidity. It is ideally suited to indoor air quality checks, comfort assessment and monitoring of storage environments where consistent conditions are essential.
Combining precise sensors with Bluetooth® connectivity and Smart App functionality, this instrument supports efficient measurement, analysis and documentation—both on site and remotely.
Accurate Measurement of Temperature and Humidity
This digital thermohygrometer measures relative humidity across a full 0 to 100 %RH range and air temperature from -20 to +60 °C, delivering dependable results for everyday professional use. High measurement resolution ensures clear, easy-to-interpret readings, supporting informed decisions in HVAC, facilities management and building services applications.
Smart App Connectivity for Enhanced Data Handling
Bluetooth® Low Energy connectivity allows seamless pairing with the free Smart App. Through the app, users can configure the instrument, view live readings, display graphical measurement curves and store results digitally. Documentation can be created directly on site and shared via email, simplifying reporting and reducing paperwork.
A smartphone can also be used as a second screen, making monitoring easier when measuring points are difficult to access.
Automatic Climate Calculations
In addition to humidity and temperature measurement, the instrument automatically calculates dew point and wet bulb temperature. These values are displayed immediately alongside the measured parameters, supporting deeper evaluation of indoor air quality, ventilation efficiency and condensation risk.
Timed and point mean values are also available, helping users assess changing conditions over defined periods.
Audible Alarm for Limit Monitoring
An integrated audible alarm sounds when predefined temperature or humidity limit values are exceeded. This enables prompt response to unwanted environmental changes and supports preventative maintenance and quality control processes.
Compact Design for Professional Daily Use
Lightweight and ergonomically designed, the testo 625 is easy to handle during routine inspections. The robust housing is suitable for everyday professional environments, while battery operation using standard AA cells ensures flexible, mobile use without reliance on charging infrastructure.
testo 625 Key Features:
- Measurement of air temperature and relative humidity
- Measuring range: 0 to 100 %RH and -20 to +60 °C
- Automatic calculation of dew point and wet bulb temperature
- Bluetooth® 5.0 connectivity with Smart App
- Graphical display of measurement trends and stored data
- Timed and point mean value calculation
- Audible alarm when limit values are exceeded
- Smartphone can be used as a second screen
- Compact, handheld design for mobile professional use
What comes with the testo 625?
- testo 625 humidity/temperature measuring instrument with App connection
- Transport bag
- Calibration certificate
- 3 x AA batteries
❓ Frequently Asked Questions (FAQ)
Q1: What does the testo 625 measure?
A. It measures relative humidity and air temperature and automatically calculates dew point and wet bulb temperature.
Q2: Can measurement data be stored and shared?
A. Yes. When used with the Smart App, measurement data can be saved, displayed graphically and shared as digital reports.
Q3: Is this suitable for indoor air quality assessment?
A. Yes. It is designed for professional assessment of indoor climate, comfort levels and storage conditions.
Q4: Does it require mains power?
A. No. It operates on standard AA batteries, making it ideal for mobile use.