Modern instruments change how the world works and performs by providing essential data that drives industrial decisions. A hygrometer measures the water vapor in soil, air, or confined spaces for industries such as manufacturing and agriculture. Also, some of these measurements rely on other quantities, such as mass, pressure, and temperature, depending on the purpose. Discover how the latest technology impacts data gathering in 2022 and beyond.
Hygrometer History
Instrumentation technology such as the hygrometers of today was originally developed during the Shang dynasty in Ancient China for weather study. The original hygrometers were a lump of earth and a bar of charcoal. Others used before updated technologies include metal-paper coil, hair tension, wet-and-dry bulb, sling, and mirror dew point. Recent technology includes chilled mirrors, which determine dew points with spectroscopic light detection.
Capacitive and Resistive
Modern Tech Instrumentation tools include capacitive hygrometers for applications where space, cost, and fragility are considerations. The sensors work well against condensation and temporary high temperatures, and are subject to aging. Resistive hygrometers measure a material's change in electrical resistance due to humidity. A temperature sensor is required to check humidity and temperature for results.
Thermal
Much like a thermal hygrometer, many general tools and instruments rely on thermal conductivity. These devices measure absolute humidity rather than relative humidity.
Gravimetric
Another form of instrumentation technology is the gravimetric hygrometer, which measures air sample mess compared to an equal volume of dry air. The US, EU, UK, and Japan have national measurement standards for this measurement. Often this device is used to calibrate less accurate instruments, referred to as transfer standards.
Optical
Optical hygrometers measure how much light is absorbed by water in the air. The device uses a light detector and light emitter and measures humidity, according to the Beer-Lambert law. Depending on the application, various types of optical hygrometers operate at different absorption and wavelengths.
Applications for Hygrometers
Hygrometers are instrumentation tools used in industrial facilities and greenhouses to measure humidity. Other applications include museums, where humidity is measured to maintain the integrity of antiques, as well as incubators and saunas. Plus, hygrometers also play a role in residential settings, firefighting, and storing wooden musical instruments, including violins and guitars.
For centuries, hygrometers have measured humidity and helped maintain the proper environmental conditions for production and storage. Today, advanced technology supports applications to help industry, including manufacturing, agriculture, and medicine. Discuss the possibilities with an industry professional to find the right hygrometer for any measurement requirements.
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