To find the relative humidity as a percentage from a dry and wet bulb thermometer, it is necessary to record these readings using two standard thermometers and a psychrometric chart. One thermometer measures the dry bulb temperature while the other measures the wet bulb temperature.Know More
To take the wet bulb temperature, place a wet cloth around the bulb and record the temperature reading, which will be lower than the dry air temperature. Similarly, record the dry bulb temperature reading of the air and use the chart to find the relative humidity. A psychrometric chart has the dry bulb temperatures at its base, and the wet bulb temperatures are found on a curved line at the left of the chart. The point where the two readings intersect on this chart is the relative humidity in percent.
An example to find the relative humidity on this chart is using a dry bulb reading of 80 degrees Fahrenheit and a wet bulb reading of 67 F. This will give a relative humidity result of 50 percent.Learn more in Weather & Tides
Humidity sensors work by detecting changes that alter electrical currents or temperature in the air, according to Sensors Online. There are three basic types of humidity sensors: capacitive, resistive and thermal. All three types of sensors monitor minute changes in the atmosphere in order to calculate the humidity in the air.Full Answer >
A humidity level of about 45 percent is considered comfortable outdoors. Levels of humidity can vary from place to place. Humidity levels change according to seasons. Winters are dry and humidity is high in the summer.Full Answer >
The instrument used to measure humidity is known as a hygrometer. Hygrometers may be used to measure the relative humidity or absolute humidity in the air.Full Answer >
The actual humidity in terms of the water content of air is typically expressed as grams per kilogram or kilogram per kilogram. Humidity is typically expressed as a percentage of how humid it could physically be at a given temperature.Full Answer >