A hygro-thermometer is a device that measures both relative humidity (RH) and temperature, combining the functions of a hygrometer and a thermometer. Relative humidity, expressed as a percentage (%), represents the amount of moisture in the air relative to the maximum it can hold without condensation (100% RH). Temperature is measured using a thermistor sensor and displayed in either Celsius (°C) or Fahrenheit (°F).
Hygro-thermometers are essential tools for monitoring environmental conditions, commonly used in industrial and commercial settings where precise control of humidity and temperature is critical. The humidity reading reflects the air's moisture content, while the temperature reading indicates the air's thermal state.