testo 174H - Mini temperature and humidity data logger

Order-Nr.  0572 6560

  • Provides reliable and economical temperature and humidity monitoring of products in storage and transport

  • Large easy to read display

  • Large measurement data memory capable of storing 16,000 temperature and humidity readings

  • Longlife NTC thermistor temperature and humidity sensor for reliable and accurate measurements

The testo 174H mini temperature and humidity data logger features a large display and alarm indication that makes it capable of monitoring air temperature and relative humidity levels at all times. This temperature and RH measurement logger is long lasting for continuous use and is highly accurate. The 174H temperature and humidity data logger has free software available as a download for easy analysis.
**Requires USB interface for programming and data transfer (0572 0500) or select starter kit with interface included**
**CFR 21 Part 11 compliant**

Product Description

The testo 174H is an ideal logger for the continuous monitoring of temperatures and humidity. The 174H has clear indications of when humidity and temperature thresholds have been exceeded.
  • High accuracy NTC thermistor sensor for reliable measurement data of temperature and humidity
  • Easy to read large display that shows current reading and exceeded measurement limits
  • IP65 proection class
  • HACCP compliant
Please note: The testo 174H temperature and humidity data logger requires an interface. One interface can be used for multiple instruments.


Delivery Scope

testo 174H temperature and RH measurement logger
Temperature - NTC

Measuring range

-4° to 158 °F / -20 to +70 °C


±0.9 °F (-4° to 158 °F) / ±0.5 °C (-20 to +70 °C)


0.1 °F / 0.1 °C

Humidity - Capacitive

Measuring range

0 to 100 %rH*


±3 %rH (2 to 98 %rH) at 77 °F / ±3 %RH (2 to +98 %RH) at +25 °C

< ±1 %rH / year drift at +77 °F / < ±1 %RH / year drift at +25 °C


0.1 %rH

* Not for condensing atmospheres.

General technical data


1.20 oz. / 34 g


2 x 1 x 0.7 in. / 60 x 38 x 18.5 mm

Operating temperature

-4° to 158 °F / -20 to +70 °C



Protection class



2 internal

Product colour



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)


16,000 measuring values

Storage temperature

-40° to 158 °F / -40 to +70 °C

Monitoring and documentation of building climate

Temperature and relative humidity are crucial factors when it comes to assessing air quality and comfort levels in indoor areas, e.g. in workplaces. Both values can be monitored and documented over the long term using data loggers.
They are also very well suited for checking ventilation systems or for assessing any building moisture which occurs.
The use of special software means measurement configurations can be carried out individually and recorded measurement data can be both analysed and archived.

Monitoring and documentation of storage temperature and humidity

Correct compliance with storage temperature and humidity is an important prerequisite for the quality assurance of many products, e.g. in the area of food and pharmaceutical products.
As a general rule, data loggers are used to do this. They automatically check and document the profile of the ambient conditions and thus make a crucial contribution to verifiable preservation of product quality.

Viewing breaches of limit values directly on the display means you can respond quickly to temperature and humidity deviations. In addition, with the help of the configuration and read-out software, customer-specific measurement configurations can be carried out and recorded measurement data can be both analysed and archived.

Monitoring and documentation of transport temperature and humidity

For all goods which react sensitively to temperature and humidity fluctuations or have to be stored within a predefined range, uninterrupted measurement data recording and documentation play a major role.
Incorrect conditions during transport can lead to major losses of quality, including the total loss of value of the products that require monitoring.

Using a data logger, shipments can be checked for compliance with the specified temperature and humidity ranges and the data can then be read, analysed and archived by means of special software.