Testo 605i Wireless Smart Thermohygrometer | Dew Point & Wet Bulb
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Testo 605i Wireless Smart Thermohygrometer — Temperature, Humidity, Dew Point & Wet Bulb
The Testo 605i is a compact wireless temperature and humidity measuring instrument from the Testo Smart Probes range. It connects to your smartphone or tablet via Bluetooth and the testo Smart Probes App, automatically calculating dew point and wet-bulb temperature from live measurements — useful for HVAC commissioning, duct humidity checks, and identifying areas susceptible to mould.
The 605i is suited to HVAC/R technicians and building services professionals who need combined temperature and humidity measurement with automatic psychrometric calculations, without carrying a separate calculator or reference table.
When used with the Testo 805i infrared thermometer, the app enables mould risk identification via a traffic light principle — comparing surface temperature against ambient humidity conditions. When used with the Testo 405i, BTU/H calculations are also possible.
Confirm current testo Smart Probes App compatibility with your smartphone OS version before ordering. Confirm all specifications against the Testo 605i datasheet for your specific application.
Key Features
- Measures air temperature and relative humidity in rooms and ducts
- Automatic calculation of dew point and wet-bulb temperature in the app
- Automatic calculation of target superheat and enthalpy via app
- Mould risk identification via traffic light principle — use with Testo 805i
- BTU/H calculation in combination with Testo 405i
- Suitable for checking AC system humidifiers
- Wireless Bluetooth connection to testo Smart Probes App
- View data as chart or table — export as PDF or Excel via email
- Calibration protocol included
- 2-year warranty
What’s Included
- Testo 605i thermohygrometer smart probe
- Batteries
- Calibration protocol
App Requirements
- iOS 8.3 or later
- Android 4.3 or later
- Bluetooth 4.0
Confirm current app compatibility with your device and OS version before ordering.
Best For
- HVAC/R technicians measuring supply and return air temperature and humidity
- Commissioning and performance verification of air conditioning and ventilation systems
- Checking AC system humidifiers and dehumidifiers
- Mould risk assessment in combination with the Testo 805i infrared thermometer
- Technicians who need automatic dew point and wet-bulb calculations without manual lookup
Check Before Ordering
- Confirm testo Smart Probes App compatibility with your smartphone OS version
- Confirm measurement range and accuracy against the Testo 605i datasheet for your application
- For mould risk detection, use in combination with the Testo 805i infrared thermometer
- Warranty: 2 years — confirm current terms at time of purchase
Frequently Asked Questions
Does the Testo 605i calculate dew point automatically?
Yes — the testo Smart Probes App automatically calculates dew point and wet-bulb temperature from the 605i’s live temperature and humidity readings.
Can I use the 605i for superheat calculations?
The app includes automatic target superheat and enthalpy calculations when used with compatible Testo Smart Probes. Confirm current app functionality against the Testo datasheet.
What app does the Testo 605i use?
The testo Smart Probes App, available for iOS and Android. Confirm current compatibility with your device and OS version before ordering.
What is the warranty?
2 years. Confirm current terms with HVAC Trade Supply at time of purchase.
Browse the full Testo Smart Probes range or contact our team for advice on building a wireless measurement kit.