Humidity is the measure of water vapour present in a gas. It is usually measured as absolute Humidity, Relative Humidity or Due point temperature. In this experimental setup we are measuring Humidity in terms of Relative Humidity. Relative Humidity is The Ratio of water vapour pressure actually present to water vapour pressure required for saturation at a given temperature. The ratio is expressed in percent. Relative humidity (RH) is always dependent on temperature. In this trainer, an external optional DMM is used to measure the humidity in terms of voltage when it is in 2V DC range. The reading so obtained is direct indication of Relative Humidity in terms of percentage. This trainer has a humidity transducer capable of measuring RH in the range of 20% to 90%, a timer, an instrumentation amplifier, a precession rectifier and built-in power supply . |
