Air humidity measuring instrument

The portable hygrometer reliably measures indoor air humidity and temperature with rapid results and built‑in calculation functions for dew point and wet bulb values.

The :contentReference[oaicite:0]{index=0} is backed by manufacturer specifications showing a capacitive humidity sensor with long‑term stability and ±2.5 % RH accuracy, plus an NTC temperature sensor for precise climatic readings. Scientific calibration routines and ISO calibration certificates are provided with each instrument to ensure measurement confidence in environments such as offices, storage rooms, and production areas. 

Across verified customer reviews on major retail platforms, users consistently rate this hygrometer highly for its simplicity, reliable performance, and clear display. Professional reviewers in the test and measurement category note that its compact size and automatic dew point and wet bulb calculations make it useful for quick environmental checks, while feedback from field users highlights the steady performance of its humidity sensor. (Ratings aggregated from online consumer reviews.)

Common applications include indoor climate monitoring, HVAC spot checks, baseline environmental assessments, and server room humidity checks. General feedback emphasizes the device’s ease of use, portability, and practical features like the hold function and max/min value display for more detailed assessments. (Based on user and product information.)

Product Description

The testo 610 measures air humidity and temperature. Our patented humidity sensor guarantees consistent results, and the calibration certificate included in this package confirms the sensor's accuracy to ±2.5 % RH. The testo 610 is capable of both dew point and wet bulb calculations, and features a convenient hold function along with max./min. value display. 

Key Features

This handheld hygrometer has an illuminated digital display that makes readings easy to view in a range of lighting conditions. It automatically calculates dew point and wet bulb temperature, essential for understanding moisture conditions in indoor spaces. The compact instrument also stores min./max. values and includes a data hold function for snapshot measurements. 

Practical Design and Portability

Designed for portability, the testo 610 comes with a clip‑on protective cap, wrist strap, and belt pouch for safe storage and convenient transport. Its pocket‑sized form factor and long battery life make it ideal for professionals on the go. 

Technical Specifications

Temperature
Measuring range: -10 °C to +50 °C
Accuracy: ± 0.5 °C
Resolution: 0.1 °C 

Humidity
Measuring range: 0 % to 100 % RH
Accuracy: ± 2.5 % RH (5–95 % RH)
Resolution: 0.1 % RH 

General Data
Weight (incl. batteries & protective cap): 90 g
Dimensions (incl. protective cap): 119 × 46 × 25 mm
Battery type: 2 × AAA micro batteries (LR03)
Battery life: ~200 h (without backlight) 

Q&A

What environments is the Testo 610 best suited for?

This hygrometer is ideal for indoor climate checks such as offices, storage spaces, server rooms, and production facilities where quick, reliable humidity and temperature data are needed.

Does the Testo 610 calculate dew point and wet bulb temperatures?

Yes — the device automatically calculates both dew point and wet bulb temperatures based on measured air temperature and relative humidity, which helps assess moisture conditions more thoroughly. Can I use this instrument outdoors?

While the testo 610 is designed mainly for indoor climate monitoring, it may be used outdoors if protected from water and extreme conditions due to its IP20 protection class and operating temperature limits.