How can we use the PT100 temperature sensor in the right way?

It is the graduation number of platinum thermal resistance, similar to thermocouple, used to measure temperature in industry, PT100 temperature sensor pt100 temperature measurement range -200~+500°C.

What is the wiring method of PT100 temperature sensor?

What is the simple debugging method of PT100 temperature sensor?

What should we pay attention to when using the voltage of PT100 temperature sensor?

What is the wiring method of PT100 temperature sensor?

Wiring method of PT100 temperature sensor:

PT100 temperature sensor means that its resistance is 100 ohms at 0 degrees. PT100 temperature sensor is a resistance temperature sensor made of platinum (Pt), which belongs to a positive resistivity. The relationship between its resistance and temperature change is as follows: R=Ro(1+αT).

The main technical parameters of PT100 temperature sensor are as follows: Measuring range: -200℃～+850℃; Allowable deviation value △℃: Class A ±(0.15 +0.002│t│), Class B ±(0.30＋0.005│t│ ); thermal response time <30s; minimum insertion depth: minimum insertion depth of thermal resistance ≥200mm; let-through current ≤5mA. In addition, the PT100 temperature sensor also has the advantages of anti-vibration, good stability, high accuracy, and high pressure resistance.

What is the simple debugging method of PT100 temperature sensor?

You can use a 100Ω resistor to simulate the resistance value of the PT100 temperature sensor at 0°C, connect to the sensor input and see if the display = 000. If it is not correct, you can adjust the trimmer potentiometer to achieve it; then use a 281Ω resistor to simulate The resistance value of the PT100 temperature sensor sensor at 500°C should be displayed at 500 characters ± 1 character; finally, a 194Ω resistor is used to replace the 250°C sensor resistance input, and it should display 250 ± 1 character. If there is no problem after the above debugging, It can be connected to the real PT100 temperature sensor and put into use. (Real sensors also have errors, you can adjust the potentiometer of the preamp to correct it.)

What should we pay attention to when using the voltage of PT100 temperature sensor?

The current cannot be greater than 5mA, and the resistance changes with the temperature, so the voltage used by the PT100 temperature sensor should also be paid attention to.

In order to improve the accuracy of temperature measurement, a 1V bridge power supply should be used, and the 5V reference power supply of the A/D converter should be stabilized at 1mV level; if the price allows, the PT100 temperature sensor, A/D converter and operational amplifier should be Linearity should be high. At the same time, using software to correct its errors, the accuracy of the measured temperature can be within ±0.2°C.

T Sensor Tech has been developing PT100 temperature sensor for many years, and is known as "the national brand leader in the Chinese temperature sensor". Therefore, customers can choose their products with confidence.