Pt100 - Temperature Sensors

-Description of different temperature measurement principles-

About the site

This is a private information page about electrical temperature measurement with resistance thermometers (e.g. Pt100, Pt500, Pt1000). My experiences of many years in the field of measurement and control technology are recorded. I do not take over any liability for incorrect information and would be pleased about further suggestions and requests for additions.
Please also visit my information page about variable area flowmeters: https://schwebekö

Suppliers of Pt100

Links to selected manufacturers and suppliers of Temperature Sensors.

Temperature measurement

Temperature is a physical parameter that measures the average kinetic energy of the particles in a system.
In common parlance, how warm or cold a substance or place is.
It is one of the seven base units of the SI system.
An increase in temperature means that particles in a system are moving faster and more chaotically, while a decrease in temperature means that particles are moving slower and more orderly.
In order to obtain comparable and reproducible values for temperature, the unit "Kelvin (K)" was defined in the international SI system of units. However, this is usually only used in science or in calculation formulas. In practice, the historically developed units "degrees" are used, which were fixed at certain fixed points of substances (e.g. at "degrees Celsius": melting point/boiling point of water).

Temperature is one of the most important measurands in our daily lives and one of the most commonly measured physical quantities.
Below are some examples:
Humans have the ability to roughly determine different temperatures based on their experience. For example: body temperature/fever, ice water/boiling water, colour of a flame, etc.
In most cases, however, an exact determination of the temperature is necessary. This is done by means of various measuring devices, which are also called thermometers in common parlance.

Electronic temperature measuring instruments

Mechanical temperature measuring instruments (thermometers)

Chemical temperature measurement