Pt-100 temperature sensors
"Welcome to our PT100-PT1000 page.
(For those who are less familiar with the topic);
Pt100 is a temperature reading sensor containing a resistance made of platinum material. Two important codes are associated with this sensor:
- The first part, Pt, is the chemical symbol for platinum, which indicates that the sensor is platinum-based.
- The second code number (100) is related to the device's resistance at 0°C. In this case, when you read a value of 100Ω from the sensor, it means that you have received data equivalent to "zero degrees."
While we are at it, there are a few variations of temperature reading based on resistance value. Other materials such as nickel (Ni) Ni120 and copper (Cu) Cu100 can be used, and there are different resistance values such as 50Ω, 500Ω, and 1000Ω (pt1000).
PT100 Operating Principle:
Pt100 is, as mentioned above, a sensor used to measure temperature. It is a type of sensor that falls into the Resistance Temperature Detectors or RTDs group. Before understanding how the sensor works, it is worth looking at the terminology used, as knowing them is extremely useful when defining a sensor.
It is based on the resistance measurement principle:
- Material platinum and resistance value 100 ohms at 0°C
- Platinum has a positive resistance temperature factor; resistance increases as temperature rises
- The rate of change in resistance increases as temperature increases; 0.39 ohms / 1 ° C
One of the basic advantages of the Pt100 sensor is its level of long-term stability, which is better than that of other temperature measurement methods, with a deviation rate of less than 0.2 ohm / 0°C. This is why the Pt100 variant is the most widely used temperature reading sensor. Other sensors that use platinum (nickel and copper) are the most common group and are generally referred to as Platinum Resistance Thermometers or PRTs.
As previously stated, a Pt100 temperature sensor is converted into a group of sensors called Resistance Temperature Detectors. The keyword is "resistance" because a Pt100 measures temperature by using a resistance change to indicate the temperature value. For a Pt100, the resistance is 100Ω at 0°C and 138.5Ω at 100°C. Therefore, the resistance change for each degree Celsius is 0.385Ω.
PT100 Sensor Structure:
This temperature sensor structure can contain multiple Pt100 resistances: 1, 2, or 3 × Pt-100 (the most common being 1 × Pt-100). The resistance element can be produced in different versions for different measurement circuits: 2-, 3-, or 4-wire connections (the most accurate is 4-wire). Even in its standard version, the industrial Pt100 sensor is resistant to vibration and can be produced as an additional vibration-proof version for challenging conditions.
Output measurement from a Pt100 temperature sensor is extremely easy. There are many electronic devices on the market that accept the Pt100 signal. These devices are configured to ensure proper measurement and linearization, providing you with an accurate temperature measurement. It is normal to take transmission losses into account (OFFSET) in some applications where the cable lengths are too long. All Pt100 reading devices on our website have these features as standard."
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