Thermometer Definition, Type Of Thermometer

thermometer
A thermometer is a type of instrument used to measure temperature. It uses heat flow rate to measure temperature. the heat flow rate between the object and thermometer. heat transfer always higher temp to lower temp.its used to measure the temperature of a chemical reaction such as gaseous, liquid or solid matter or fire. Temperature measurement is important for a wide range of activities including industry, scientific research, and health care. In health care, thermometers are used to measure human body temperature.

Type of Thermometer 

  • Digital thermometers
  • Infrared thermometer
  • Thermocouple Thermometer
  • Ear Thermometer 
  • Forehead Thermometer 
  • Plastic strip Thermometers
  • Pacifier Thermometer
  • Glass and mercury Thermometers
  • Pyrometer Thermometer  
  • HVAC Thermometer  

Thermocouple Thermometer 
thermocouple thermometer

A thermocouple is an electrical device consisting of two uneven electrical conductors forming an electrical junction. A thermocouple produces a temperature-dependent voltage as a result of a thermoelectric effect, and this voltage can be interpreted to measure temperature. Thermocol temperature sensors are widely used.

 Digital Thermometer
 Digital Thermometer

 Digital thermometers are considered to be the fastest and most accurate type of thermometer. Readings are taken under the tongue, from the rectum or under the armpit. They are easily found in local pharmacies and can be used at home or in the hospital.

Infrared thermometer
Infrared thermometer

 An infrared thermometer is a thermometer that sometimes measures the temperature from a portion of thermal radiation called black-body radiation emitted by an object. ... It allows temperature measurement from a distance without contact with the object being measured.

Ear Thermometer

Ear Thermometer

They use infrared technology to read their temperature. Electronic ear thermometers are less accurate such that it may give inaccurate readings when there is too much wax in the ear. Despite being expensive, they are very easy to use on infants and young children, as it can be difficult for children to sit for long periods of time using a digital thermometer.

Forehead Thermometer 
Forehead Thermometer

A forehead thermometer is a device that can read the temperature quickly to detect fever. It measures the temperature in the temporal artery, which is directly connected to the heart through the carotid artery. ... Forehead thermometers can be as accurate as oral and rectal thermometers, and are much less invasive.

Plastic strip Thermometers
Plastic strip Thermometers

These thermometers can detect the presence of fever in a patient, however, they do not give an accurate temperature reading. They simply act as a sign that something may be wrong. To use them, you just place the bandage on the forehead.
A liquid crystal thermometer, temperature strip or plastic strip thermometer is a type of thermometer in which a plastic strip contains heat-sensitive liquid crystals that change color to indicate different temperatures.

Pacifier Thermometer
Pacifier Thermometer

Passifier thermometer was 72 percent sensitive and 97 percent specific in fever detection. When oral readings were adjusted above 0.5 ° F, sensitivity increased to 92 percent, but specificity was reduced to 76 percent.
Provide soothing comfort while taking baby's temperature. Pacific Thermometer's convenient Fever Alert brightness feature allows parents to read one night's temperature without disturbing the child. A protective cover is included for travel and clean storage. 

Glass and mercury Thermometers
Glass and mercury Thermometers

The mercury-in-glass or mercury thermometer was invented in Amsterdam by physicist Daniel Gabriel Fahrenheit. It consists of a bulb with mercury attached to a glass tube of narrow diameter; The amount of mercury in the tube is much less than the volume of the bulb. 
The volume of mercury varies slightly with temperature; A small change in volume gives the narrow mercury column a relatively long path to the tube. The location above the mercury may be filled with nitrogen gas or it may be less than atmospheric pressure, a partial vacuum. 

Pyrometer Thermometer  
Pyrometer Thermometer 

A pyrometer is a type of remote-sensing thermometer, which is used to measure surface temperature. 

HVAC Thermometer  
HVAC Thermometer 

HVAC thermometers are commonly used to measure the temperature of air, water, refrigerant, and copper lines, and these measurements are important to detect the source of a potential hazard or defect. 

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