The testo 174 H allows you to monitor temperature and humidity sensitive goods – including foods, archives or metal parts that are susceptible to surface rust – or carry out discreet humidity checks in buildings to ensure that the property is being properly looked after by the tenants.       
The testo 174 H mini data logger has built-in longlife sensors that can measure the temperature and humidity of the surrounding environment, a memory for up to 16 000 measurements and an easy-to-read display that shows the current reading as well as any breached thresholds.  
Practical: The standard batteries (2x CR 2032) included in the scope of supply can be easily replaced by the user.

Delivery Scope

testo 174H temperature and humidity mini data logger, wall bracket, 2 x CR 2032 lithium batteries, calibration protocol.

Temperature - NTC

Measuring range

-20 to +70 °C


±0.5 °C (-20 to +70 °C)


0.1 °C

Humidity - Capacitive

Measuring range

0 to 100 %RH*


±3 %RH (2 to +98 %RH)

±0.03 %RH/K


0.1 %RH

* Not for condensing atmospheres. For continuous use in high humidity (>80 %RH at ≤30 °C for >12 h, >60 %RH at >30 °C for >12 h), please contact us via our website.

General technical data

Storage temperature

-40 to +70 °C


60 x 38 x 18.5 mm

Operating temperature

-20 to +70 °C

Protection class





2 years

Measuring rate

1 min - 24 h

Battery type

2 lithium batteries (CR2032)

Battery life

1 year (15 min measuring cycle, +25 °C)


16,000 measuring values

Download Product Brochure

testo 174H-Temperature and Humidity Data Logger

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