The hygrometer is a measuring instrument for determining the relative humidity of the air. With the air temperature, you can determine the water vapor content of the air from the humidity. This is also referred to as a humidity meter.
The following suppliers offer Hygrometer products.
You can send a request to the suppliers listed above and save a lot of time. You only need to specify your requirements, which will be sent to the selected suppliers. They will contact you with proposals without any obligation.