An infrared spectroscopy humidity sensor is a device that measures the amount of water vapor in the air. It emits infrared radiation, a form of electromagnetic energy, and detects the changes in the radiation that is absorbed by water molecules. The absorption of infrared radiation by water molecules is directly proportional to the amount of water vapor present in the air. Infrared spectroscopy humidity sensors are widely used in various industries and applications, including:
Infrared spectroscopy humidity sensors operate on the principle of infrared absorption. It utilizes the fact that water vapor molecules absorb infrared radiation at specific wavelengths. When infrared radiation is passed through a sample of air, some of the radiation is absorbed by water vapor molecules. The amount of absorption is directly proportional to the concentration of water vapor in the air.
The sensor consists of an infrared light source, a detector, and a wavelength filter. The light source emits infrared radiation at specific wavelengths, and the detector measures the intensity of the radiation that reaches it. The wavelength filter is used to select the wavelengths of interest, which are typically in the range of 1.38 μm to 1.5 μm.
Infrared spectroscopy humidity sensors offer several advantages over other types of humidity sensors. They are:
Infrared spectroscopy humidity sensors have a wide range of applications, including: