How to Select Different Kinds of Thermometers?

Posted by seobusniess on December 8th, 2015

While choosing a thermometer like Industrial Glass Thermometer and things like Contractor Pressure Gauge, the important things to think about are case or dial size, capillary or stem length, as well as the temperature range and connection type. To make sure accuracy and safety, thermometers needs to be chosen while providing consideration to measured media as well as ambient working conditions. Inappropriate application can be harmful to the thermometers, causing failure as well as possible property damage or personal injury.

Knowing the media and environment, which the thermometer can be chosen to is very important. This information can determine what kinds of thermometers are needed and in case the thermowells are required. Errors in temperature measurement to remember include convection, conduction, radiation, and noise, response time, grounding problems and shorts (particularly on the metal surfaces).

ü  Remote Reading Thermometer

Remote reading thermometer is the instruments utilized to calculate temperature from the remote source. Through the capillary tube having a sensing prod at one end as well as an indicator dial on the other hand, temperatures may be find out from the source, which is equal to 30’ (9m) away.

Remote reading thermometer is packed with either vapor or gas according to the specifications. Because of changes in temperature, the vapor or gas contracts/expands, creating pressure, which is measured by the Bourdon tube.

The average being measure needs to be considered while choosing a remote reading thermometer. Think about factors like humidity, installation, ambient temperature, indoors/outdoors, corrosive atmosphere, existence of dust, frequency, mechanical shock, and scale of vibration.

Cases are accessible in different sizes as well as made from stainless steel, cast, and phenolic aluminum. The capillaries are accessible in stainless steel and copper braided (with/without flexible armors), in the variety of lengths. In winter, it is recommended to use stainless steel bulbs and capillary for the procedure temperatures above the 500°F (260°C).

ü  Liquid-In-Glass Thermometer

Liquid-in-glass thermometer is possibly the most accepted kind of thermometer. Liquid-in-glass thermometer indicates pressure through measuring the contraction and expansion (i.e. when the filled liquid is heated, it rises and expands). Its temperature is specified on the upright scale besides the filled liquid in a glass tube.

ü  Gas Thermometer

Gas-filled thermometer is specially designed for the industrial applications requirements for uniform and accurate response in the whole range. The whole system is well filled under the pressure using inert gas to get accuracy, positive movement, and compassion. The accuracy provided by the system is ±0.5% of the complete scale value.