This is a thermo hygrometer, this is a vital part of ensuring that a water damage job is progressing correctly. Not only to we measure the moisture content of building materials such as drywall or carpet, we also measure the "air" inside the damaged areas but also outdoors and the machines that are working in the damaged areas. We monitor each job every day to ensure that the job continues to make drying progress. The relative humidity and temperature is taken from each room, outside, and equipment placed every day.