What is the humidity sensor?
Moisture sensor, also called hygrometer, measures and regularly reports relative humidity in the air. They can be used in households for people with diseases affected by moisture; as part of heating, ventilation and air conditioning systems (HVAC); and in moisture or wine cellars. Moisture sensors can also be used in cars, HVAC office and industrial systems and meteorological stations for reporting and weather forecast.
The humidity sensor senses relative humidity. This means that it measures air temperature and humidity. Relative humidity, expressed as a percentage, is the ratio of the actual humidity in the air to the highest amount of humid air at this temperature. The warmer the air, the more humidity it can hold, so the relative humidity changes with temperature fluctuations.
The most common type of humidity sensor uses what is called "capacitive measurement". This system relies on electric capacity or to the ability of two close electricity connectors to create an electrichim the field between them. The sensor itself is composed of two metal plates with a non -conductive polymer film between them. The film collects moisture from the air and the humidity causes minor changes in the voltage between the two plates. Voltage changes are converted to digital values showing the amount of humidity in the air.
A person with a respiratory disease or certain allergies can use a domestic humidity sensor, as low humidity can deepen the respiratory problems and cause joint pain, while high humidity promotes bacteria, mold and fungi. Homemade humidifiers and wine cellars often have a humidity sensor that helps maintain consistent relative humidity optimal to safe long -term storage. Moisture sensors can also be used in households or museums where valuable antiques or works of art are kept as these objects can be damaged or degraded from coexposition too largeé moisture.
Commercial and office buildings often have humidity sensors in their HVAC systems that help ensure safe air quality. Many cars use as part of their defrosting and separating systems to automatically adjust the temperature and air source used for heating and air conditioning. Industrial applications for the production of materials that are sensitive to moisture also have moisture sensors. Moisture sensors provide regular, ongoing relative humidity values, so they are used to collect data in oceanography and weather stations where moisture needs to be measured over time to analyze patterns and weather forecast.