Metravi 0 Deg C Digital Temperature and Humidity Meter is an instrument used to measure the amount of water vapour in the air, in soil, or in confined spaces. 0 Deg C Digital Temperature and Humidity Meter usually rely on measurements of some other quantities such as temperature, pressure, mass, a mechanical or electrical change in a substance as moisture is absorbed. Digital Temperature and Humidity Meter use condensation temperature (called the dew point) or changes in electrical capacitance or resistance to measure humidity differences. Besides greenhouses and industrial spaces, the Temperature and Humidity Meter can also be used in incubators, saunas, humidors, and museums. They are also used to care for wooden musical instruments such as pianos, guitars, violins, and harps that improper humidity conditions can damage. Product Specifications Accuracy: +/- 5 Deg C Brand: Metravi Country of Origin: India Model: TH 04 Range: 0 to -50 Deg C Relative humidity: 10 to 90 percent RH