The feel of a temperature is always a subjective thing, and cannot be determined to an exact degree. Without thermometers, it is therefore impossible to accurately determine whether certain limit values are being adhered to or whether they have been exceeded already. In many places, it is not possible to regularly read a thermometer. Bluetooth thermometers are ideal for these applications, since they collect the necessary data and send it to the smartphone. Thanks to an app for Bluetooth thermometers, it is possible to evaluate the data on it. Furthermore, long-term comparisons and analyses can be derived.
Bluetooth thermometers: Small measuring instruments for a wide variety of tasks
Bluetooth thermometers are used in the following areas, among others:
- Transportation of foodstuffs: Monitoring the cold chain
- Deliveries of refrigerated products: Measuring the incoming goods temperature
- Food storage: Temperature monitoring for storage on counters or refrigerated rooms
- Measuring the temperature of chemical solutions
For smart temperature measurement

testo 115i – clamp thermometer operated by smartphone
For servicing air conditioning and refrigeration systems and measuring flow and return temperatures.

testo 915i – thermometer operated by
smartphone
Measures ambient temperatures and temperatures in ducts and at air outlets.

testo 805i – infrared thermometer operated by smartphone
For the non-contact measurement of wall, fuse and component temperatures of air conditioning systems.
For smart humidity and flow velocity measurement
testo 605i – thermohygrometer operated by smartphone H3>
testo 405i – thermal anemometer operated by smartphone H3>

For the measurement of air flow velocities, temperatures and volume flows in ventilation ducts.
testo 410i – vane anemometer operated by smartphone H3>
For smart pressure measurement
testo 510i – differential pressure measuring instrument operated by smartphone H3>
testo 549i – high-pressure measuring instrument operated by smartphone
H3>

Smartphone thermometers: Modern temperature measurement via app
Painstakingly copying out the values measured using a thermometer is now a thing of the past. Thanks to cutting-edge technology, these days users have access to the Bluetooth thermometer, which is used in conjunction with the smartphone. This new instrument is ideal for measuring temperatures in ducts or other outlets through which air flows. Ambient temperatures can also be measured with the smartphone thermometer. The modern measuring technology of the Bluetooth thermometers is characterized by the highest accuracy, plus the possibility of transmission to the smartphone. Not only does Testo’s app for Bluetooth thermometers read the measured values, it also evaluates them.
It is helpful to be able to display the values of the Bluetooth thermometers in table format or optionally in a diagram. Changes of a short, medium and long-term nature are therefore visible immediately. Users can also utilize the report function, which can then convert these into an Excel or PDF file. Therefore it is also possible to transmit the data of Bluetooth thermometers very easily. It is important that the required system requirements are met: Android 6 or iOS 10 are required. Bluetooth 4.0 format must also be supported.
The advantages of smartphone Bluetooth thermometers are obvious:
- Independent measurements
- Rapid transfer of data
- Direct visibility of changes
- Easy creation of logs, reports and evaluations
testo Smart App H3>
Bluetooth measuring instruments: Bluetooth thermometers and more
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Bluetooth Smart Probes
Smart Probes sets the new standard when it comes to temperature and humidity measurement. The readings are collected via the Bluetooth thermometer and the data is then transmitted to the smartphone. There, in turn, the app for the Bluetooth thermometer is installed, making it possible to display and evaluate the readings independent of the measuring location. Measurement protocols can be created, and photos and comments can also be added. So tradespeople and technicians can be more mobile than ever before, and operate the compact measuring instruments quite easily using their own phone or tablet. The app for Bluetooth thermometers and other measuring instruments can be used free of charge, ensuring that all the results and reports are available at any time and place. You can also send the data by e-mail, enabling multiple users to share access to the data.
iPhone thermometers: Mobile recording of temperatures

The testo Smart app is available for Android and iOS. The practical measurement menus turn the smartphone or tablet into a mobile measurement centre and make your work much more efficient. In addition, different readings can be displayed simultaneously, and changes in the readings are immediately visible. Advantages of Bluetooth thermometers for the smartphone or tablet include:
- Display of up to six Smart Probes
- Measuring values can be read from a distance
- Automatic calculation of various parameters
- Image documentation and insertion of comments possible
- Pre-installed menus available