The Jahn Hygrometer is a bi-metal hygrometer, suitable for reading the humidity level. It is crucial for wooden instruments such as acoustic pianos and acoustic guitars to have proper humidity levels. If the air becomes too dry, there is a high risk of cracks forming in the wood, resulting in permanent damage to your instrument.

The Jahn Hygrometer can be calibrated using a screw. It is possible to place the hygrometer lying down or to hang it on the wall. The ideal humidity for acoustic instruments is between 45 and 50 percent. If the humidity drops below 30 or rises above 70, it's important to take action! It is possible to place a humidifier in your home to improve overall humidity levels. There are also specific solutions for each instrument. For example, a Piano Life Saver system can be installed in your piano. This provides a consistent climate and maintains the humidity level throughout the year, regardless of external climate or environment. Your acoustic guitar can be protected by placing a humidifier in the sound hole.