Indoor Electronic Hygrometer TFA-Dostmann 30.5038 Black

The TFA-Dostmann 30.5038 Indoor Electronic Hygrometer is a compact square device in black with a high-gloss surface that measures room temperature and relative humidity. It displays current, maximum and minimum values, includes a clock with date, an alarm with snooze and an optional hourly chime. The instrument helps monitor indoor climate so you can adjust heating and ventilation to remain within comfort ranges and protect health, plants, pets and wooden furnishings.

Advantages

This electronic hygrometer offers combined temperature and humidity measurement with a clear display and memory for highest and lowest readings. A smiley icon indicates when the measured values are within the comfort zone, simplifying interpretation. The integrated clock, alarm with snooze and hourly chime add practical daily functions while the compact 94 × 37 × 94 mm design and AA battery operation make it easy to place and maintain.

Suitable for

• Homes and apartments for monitoring living-room and bedroom climate
• Rooms with wooden floors, antique furniture or musical instruments
• Plant rooms and indoor gardens
• Pet rooms and terrariums (as a general indoor reference)

Key specifications

• Brand: tfa dostmann
• Model: 30.5038
• Dimensions: 94 mm × 37 mm × 94 mm
• Power: AA batteries
• Colour: Black (high-gloss surface)
• Displayed values: temperature (°C/°F), relative humidity, date and time
• Functions: max/min memory, comfort smiley indicator, alarm with snooze, hourly chime

How to use

Place the hygrometer on a stable surface or mount it where it measures representative room air away from direct heat sources, windows or drafts. Insert the required AA battery, set the preferred temperature unit (°C or °F) and adjust clock and alarm settings via the front controls. Read the current temperature and humidity on the display; press the appropriate button to view stored maximum and minimum values. Use the smiley indicator and recorded values to decide whether to increase ventilation or adjust heating.

Recommendations

For reliable readings, position the device at chest height in the centre of the room and avoid placing it near radiators, open windows or direct sunlight. Regularly check and replace the AA battery to ensure continuous measurement and reset max/min memory after significant changes in room conditions.