Instrument Used To Measure Relative Humidity

Humidity can be a complex topic to understand.

Instrument used to measure relative humidity.

A hygrometer is a weather instrument used to measure the amount of humidity in the atmosphere. At low humidities the calibration accuracy of instruments measuring relative humidity may not be adequate. For example vaisala drycap products are designed for measuring dew point. A simple form of a hygrometer is specifically known as a psychrometer and consists of two thermometers one of which includes a dry bulb and the other of which includes a bulb that is kept wet to measure wet bulb temperature.

Analog hygrometers use a coil spring with moisture sensitive material attached. Environments with 10 rh are defined here as low humidity environments. Water evaporates from the cloth causing the temperatures on that thermometer to be lower than the other. Temperature and humidity measuring devices track temperature changes humidity levels and other climatic conditions in commercial and industrial environments.

A psychrometer uses two thermometers to measure relative humidity. Humidity measurement instruments usually rely on measurements of some other quantities such as temperature pressure mass a mechanical or electrical change in a substance as moisture is absorbed. Select an analog hygrometer for an inexpensive option. There are two main types of hygrometers a dry and wet bulb psychrometer and a mechanical hygrometer.

Analog hygrometers are cheaper than digital hygrometers and are often much more durable. Two thermometers are used in a sling psychrometer. A psychrometer is an example of a hygrometer. Digital thermometers provide precise temperature readings for a wide range of applications including indoor and outdoor settings heating and cooling systems and chemical processing.

Wet the cloth of one of the thermometers and swing the psychrometer around a few times. In this article we ll go over the five different units that you need to learn and we ll explain why relative humidity is the most useful. One measures the dry bulb temperature and the other measures the wet bulb temperature. A hygrometer is an instrument used to measure the amount of water vapor in air in soil or in confined spaces.

Just about everyone knows that it refers to the amount of moisture in the air but you re a lot less likely to find someone who understands the different humidity measurement units. The measurement of humidity may be done directly by a hygrometer but the usual instrument is called a psychrometer which uses two thermometers to obtain temperatures that indicate the relative. A hygrometer is an instrument used to measure relative humidity. Hygrometers are instruments used for measuring humidity.

A sling psychrometer measures relative humidity using the cooling effect of evaporation.