Electronic environment thermometer TFA-Dostmann 30.3139 Indoor Grey F °C

The TFA-Dostmann 30.3139 is an electronic indoor environment thermometer with a compact grey housing and a clear display. It measures temperature in both Celsius and Fahrenheit and is powered by two 1.5 V AAA batteries. The device is intended for indoor climate monitoring and is compatible with several instrument mounts (models 30.3033, 35.1057, 35.1058, 35.1066, 35.1071).

Advantages

The thermometer offers dual temperature units (°C and °F) for flexible use, a space-saving design (61 mm × 30 mm × 96 mm) and low weight (0.063 kg) for easy placement on shelves or walls. Battery operation ensures installation without cabling and quick setup using standard AAA cells. The clear display provides straightforward temperature readings for everyday indoor monitoring.

Suitable for

• Monitoring room temperature in living rooms and bedrooms
• Use in offices and workspaces to check indoor climate
• Placement in nurseries or playrooms to monitor comfort
• Compatibility with specified instrument mounts (30.3033, 35.1057, 35.1058, 35.1066, 35.1071)

Key specifications

• Model: TFA-Dostmann 30.3139
• Power: 2 × 1.5 V AAA batteries
• Temperature units: °C and °F
• Colour: Grey
• Dimensions (W × D × H): 61 × 30 × 96 mm
• Weight: 0.063 kg
• EAN: 4009816014597

How to use

Insert two 1.5 V AAA batteries into the battery compartment following the polarity markings. Place the thermometer on a flat surface or attach it to a compatible mount listed in the compatibility note. Allow the device a few minutes to stabilise after placement before taking readings. Switch between Celsius and Fahrenheit if required according to the device controls.

Recommendations

For reliable indoor temperature monitoring, avoid placing the thermometer near direct sunlight, heating vents, or air conditioners. Replace batteries when display dims or readings become unstable, and use the compatible instrument mounts for secure installation when wall mounting is required.