TFA Dostmann 44.1011 Built-in Hygrometer, Analog, 0-100% RH, Silver Bezel

The TFA Dostmann 44.1011 is a flush-mount analog hygrometer that measures relative humidity from 0 to 100% using a synthetic hair element. Unlike digital units that need batteries, this mechanical instrument operates continuously without power, making it ideal for indoor climate monitoring, terrariums, humidors, and incubators.

Highlights

• Analog dial with pointer for at-a-glance readings
• Measurement range: 0 to 100% RH, with 1% scale divisions
• Accuracy: ±5% RH within 40–70% RH range
• Battery-free mechanical operation
• Flush-mount design with 54 mm cut-out diameter
• Metal bezel in silver with white dial

In daily use

The hygrometer fits into a 54 mm opening and protrudes only 20 mm behind the panel, suiting thin walls or enclosures. The synthetic hair sensing element responds to humidity changes without external power, and the clear dial allows quick reading in ambient light.

Full specifications

• Measurement type: Analog
• Humidity range: 0–100% RH
• Humidity accuracy: ±5% RH (40–70% RH)
• Measurement principle: Synthetic hair
• Display: Dial with pointer
• Mounting: Built-in / flush mount
• Installation cut-out diameter: 54 mm
• Outer diameter: 60 mm
• Installation depth: 20 mm
• Housing material: Metal bezel, plastic housing
• Bezel colour: Silver
• Dial colour: White
• Power source: Mechanical (battery-free)
• Operating temperature: 0 to 50 °C
• Scale divisions: 1% RH

Final note

A dependable analog hygrometer for continuous humidity monitoring without batteries.