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0572 1743 01

testo 174 H BT - Mini data logger for temperature and humidity with Bluetooth® and app connection

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The testo 174 H BT is a compact Bluetooth temperature and humidity data logger designed for reliable climate monitoring and easy data access via the testo Smart App. It helps users monitor storage and transport conditions, verify indoor climate in rooms or workspaces, and document humidity-sensitive environments such as archives, warehouses, or laboratories. Its small size, accurate sensors, and app-based operation make climate data recording simple and efficient.
  • Monitor temperature and humidity continuously to protect rooms, goods and sensitive materials. 
  • Use Bluetooth and the testo Smart App for quick setup, wireless readout and easy data export.
  • Accurate indoor humidity and temperature measurement from -20 °C to +70 °C.
  • Compact, discreet and easy to deploy with a clear display for instant on-site climate checks. 

Monitor Temperature and Humidity Without Opening Doors or Disturbing Goods

The testo 174 H BT is a compact Bluetooth temperature and humidity data logger that records climate conditions over time. It allows quick, non-intrusive checks via a mobile app, making it ideal for storage, transport, laboratories, warehouses and indoor environments. It helps protect sensitive goods while simplifying routine monitoring.

Faster Data Checks with Bluetooth Connectivity

Bluetooth enables wireless access to data without removing the logger. Using a smartphone or tablet, you can quickly review readings - even in hard-to-reach areas like cabinets or transport boxes - saving time and reducing handling.

Key Technical Features

  • Compact temperature and humidity data logger
  • Bluetooth for wireless data access
  • Measures temperature and relative humidity
  • Suitable for long-term monitoring
  • Ideal for storage, transport and indoor use
  • Easy setup and app-based reporting
  • Clear tracking of trends and threshold events
  • Flexible, space-saving design
  • Built for professional quality assurance

Protect Sensitive Products with Continuous Climate Logging

The logger records data at set intervals, helping detect fluctuations between manual checks. Ideal for food, pharmaceuticals, electronics and archives, it ensures conditions remain within safe limits and supports compliance.

Compact Design for Discreet and Flexible Placement

Its mini format allows use in cabinets, refrigerators, storage areas and transport containers. Lightweight and easy to position, it supports both fixed and mobile monitoring across multiple locations.

Simple App-Based Documentation for Quality Control

Data can be reviewed, exported and used for reporting or audits via the app. This supports traceability, trend analysis and quick response to temperature or humidity deviations.

Reduce Risk from Moisture, Heat and Climate Fluctuations

By measuring both humidity and temperature, the logger helps prevent mould, corrosion and product damage. Ideal for archives, warehouses and sensitive storage environments.

Ideal for Modern Storage and Transport Monitoring

The testo 174 H BT combines compact design with wireless convenience, enabling efficient monitoring across storage and logistics. It improves traceability, reduces risk and supports reliable climate control.

Temperature - NTC

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

Humidity - Capacitive

Measuring range
0 to 100 %RH*
Accuracy
±3 %RH (2 to 98 %RH)
±0.03 %RH/K
Resolution
0.1 %RH
* Not for condensing atmospheres.

General technical data

Weight
35 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
white
Standards
HACCP International
Measuring rate
1 min - 24 h
Battery life
1 year (15 min measuring cycle, +25 °C)
Battery type
2 lithium batteries (CR2032)
Memory
16,000 measuring values
Storage temperature
-40 to +70 °C
testo 174 H BT mini temperature and humidity data logger including wall bracket, battery (2 x CR2032 lithium) and test report.

  • not available

Accessories

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: 0515 5174

Lithium battery CR2032 button cell

Button cell battery (CR2032, lithium)

Contact Us
Testo Ltd
Newman Lane
GU34 2URAlton
HampshireUnited Kingdom
01420 544433

Opening hours

Monday-Thursday: 8:30am - 17:00pmFriday: 8:30am - 16:00pm
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