Testo 174 H – Temperature and humidity mini data logger

  • Memory for up to 16,000 temperature and humidity measurements
  • Long life humidity sensor for reliable and accurate measurements
  • Easy data transfer via USB cable, practical data analysis and logging on PC
  • Free software download (ComSoft Basic)
You need a USB interface to program and read out the data logger. Click here to go to the set (testo 174 H + USB interface).


Product Description

The testo 174 H mini data logger 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.


Advantages of Testo 174 H


The mini data logger has built-in long life sensors that can measure the temperature and humidity of the surrounding environment, a memory for upto 16,000 measurements and an easy-to-read display that shows the current reading as well as any breached thresholds.
The standard batteries (2x CR 2032) included with the logger can be easily replaced by the user.
Programming and Analyzing the Temperature and Humidity Mini Data Logger – testo 174 HChoose 1 of 3 software versions to program or read out this mini data logger or to analyze the measuring data you have obtained on your PC:-  Software ComSoft Basic– included – allows you to program the logger and analyze the data quickly and easily-  Software ComSoft Professional– optional – provides you with additional possibilities and a more detailed analysis of the temperature and humidity values-  Software ComSoft CFR 21 Part11– optional – ideal for the special demands of the pharmaceutical sector in compliance with 21 CFR Part 11


Delivery Scope

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

Technical Data

Humidity – Capacitive

Measuring range 0 to 100 %RH*
Accuracy ±3 %RH (2 to +98 %RH) at +25 °C

±0.03 %RH/K ±1 Digit

Resolution 0.1 %RH

* Not for condensing atmospheres.

Temperature – NTC

Measuring range -20 to +70 °C
Accuracy ±0.5 °C (-20 to +70 °C)
Resolution 0.1 °C

General technical data

Weight 34 g
Dimensions 60 x 38 x 18.5 mm
Operating temperature -20 to +70 °C
Product-/housing material Plastic
Protection class IP20
Channels 2 internal
Product colour Black
Standards 2011/65/EU; EU-guideline 2014/30/EU
Measuring rate 1 min – 24 h
Battery type 2 x 3V button cell (CR 2032)
Battery life 1 year (15 min measuring cycle, +25 °C)
Memory 16,000 measuring values
Storage temperature -40 to +70 °C


Product Brochures

Data sheet testo 174H (application/pdf, 245 KB)


Instruction manual testo 174-H, -T (PDF, 1.8 MB) 

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