What is the thermometer of dialing?
Thermometer of dialing, also known as differential absorption Lidar thermometer, is a mechanical device that uses a metal indicator on a circular scale to indicate the temperature measurement. The device has two primary components; metal indicator or needle and temperature sensor. These sensors can be bimetal or bimetallic, liquid or gas filled or voltage voltage. The reduced device consists of two different metals welded or attached together, such as steel, copper or steel and brass. One metal has a low heat sensitivity, while the other has a high heat sensitivity. The bimetal sensor is attached to the metal indicator or needle on the face of the thermometer. As the temperature rises, the metals react differently, causing the metal strip to curl and move the indicator on the temperature scale.
Bimetal technology has been used in Thermometers for 200 years. It is currently popular in various domestic applications, including thermostats, wall thermometers, grills, circuit breakers for electricItem and other household applications. This species is best used for warmer temperatures and some bimetal thermometers can measure up to 500 degrees Fahrenheit (260 degrees Celsius). The accuracy decreases with a bimetal dial -up thermometer at low temperatures, as the sensitivity of two metals to low temperatures is very similar.
temperature thermometers based on liquid or liquid/gas also work on the principle of expansion and contraction. As the liquid expands or contrasts in response to temperature changes, the resulting pressure moves on the scale. Mercury, alcohol and ether are one of the available liquid choices. The liquid or gas thermometer is more accurate at lower temperatures than bimetal, and and are commonly found in HVAC systems, cooling plants, chilled trucks and photo processing equipment.
The cheaper option of dialing thermometer is a voltage -based device. ThisThe type of thermometer is filled with permanent gas. A number of liquids are used to create gas and the choice is based on the temperature range for the thermometer. These are often used in cooling, drying furnaces, chemical processing, sun heating and HVAC applications.
The dialing thermometer case is usually made of metal or stainless steel with a glass or plastic crystal covering a circular surface. The temperature can be measured in Fahrenheit, Celsius or both. Some devices such as meat thermometers have a sensing probe.
Thousands of different thermometers are available. One of the primary considerations should be the application requirements. In industrial applications, shock resistance and vibration tolerance could be important. The temperature range and degree of accuracy are also considered.