Analog Spiral Hygrometer 2.75 in. Diameter Round with Gold Metal Bezel. Analog Spiral hygrometers are the most commonly used hygrometers. The measuring element consists of a spiral shaped metal strip that reacts to changes in the humidity.
- Easy To Read Hygrometer
- Maintains An Accurate Measure Of Humidity
- Metal Bezel and Calibration Screw
- Diameter: 2.75 in. (7.0 cm)
- Made in Germany