Nordtec – Blog

How to Connect the testo 174 BT to the testo Smart App

Written by Nordtec | Jul 7, 2026 8:45:25 AM

Connecting your testo 174 BT to the testo Smart App is an easy way to manage your measurement data wirelessly via Bluetooth.

The logger functions as a stationary data logger for temperature and humidity measurement: you configure the device, start the measurement, and let it collect data over time. When you’re ready to retrieve the measurement results, you can do so wirelessly via the app.

In this guide, we’ll show you step by step how to connect your testo 174 BT to the testo Smart App and get started with your measurements.

Here’s how the connection works:
• The logger is configured via the testo Smart App
• The measurement is started and then runs autonomously
• Data can be downloaded wirelessly via Bluetooth
• Measurements continue even while data is being retrieved in the app

The Bluetooth version is often used in the field where you want to avoid cable connections and a computer during data retrieval, while the USB version is suitable for more stationary workflows where data is managed via a computer.


If you have questions about the testo 174 BT or other data loggers, please contact us—we’d be happy to assist you.