RTD PT100 Temperature Sensor 3 Wire

RTD PT100 TEMPERATURE SENSOR 3 WIRE FOR INDUSTRIAL APPLICATION.

RTDPT100 2 wire vs 3 wire .

The main differences between PT100 two-wire system and three-wire system are as follows:

1.Different wiring methods: Two-wire PT100 is the simplest connection method. Only two wires are used to connect the PT100 sensor to the measurement circuit. Of the two wires, one is used to transmit signals, and the other serves as both a power wire and a ground wire. The three-wire PT100 connects the sensor to the measurement circuit through three wires, namely power wire, signal wire and ground wire.

2.Different measurement accuracy: The measurement accuracy of the two-wire PT100 is relatively low due to the influence of wire resistance. The three-wire PT100 effectively eliminates the influence of wire resistance on measurement results by separating the power line and signal line, thereby improving measurement accuracy.

3.Different application scenarios: Two-wire PT100 is usually used in situations where the measurement accuracy requirements are not too strict or the wiring space is limited. The three-wire PT100 is widely used in occasions that require high measurement accuracy because of its high accuracy and stability.

Product Description

RTD PT100 temperature Sensor

This RTD PT100 temperature sensor is designed for accurate and stable temperature measurement in industrials. The offered Temperature Sensors are frequently used in diverse applications such as food processing and in many other application. This RTD PT100 is widely used in food processing, HVAC, chemical industry, and industrial automation systems. 

Armored thermocouple

armored thermistor

A sensor's sensitivity indicates how much the sensor's output changes when the input quantity being measured changes. For instance, if the mercury in a thermometer moves 1 cm when the temperature changes by 1 DegreeC, the sensitivity is 1 cm/ DegreeC (it is basically the slope Dy/Dx assuming a linear characteristic).

RTD PT100 TEMPERATURE SENSOR  WIRING  

4-20mA output thermocouple

Three wire wiring diagram

 

 

RTD stands for Resistance Temperature Device. Quite simply, the sensor comprises of a resistor that changes value with temperature. The most common RTD by far is the PT100 385. This element measures 100 Ohms @ 0 degrees C (32 °F) and 138.5 Ohms @ 100 °C (212.0 °F).

One of the greatest challenges for instrument engineers is dealing with the relatively low resistance of the device. This is because any stray resistance (in particular lead resistance) of RTD assembly can add a significant error to the measured resistance.

To combat this, different lead compensation schemes were invented and have come to be known as 2 wire, 3 wire and 4 wire.

 

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More details of the armored Thermocouple

 

 

3WIRE PT100 WIRE CONNECTION INSTRUCTION:

The three-wire PT100 temperature sensor has three leads. Usually A, B, C or black, red and yellow can be used to represent the three wires. The three wires have the following rules: the resistance between A and B or C is about 110 ohms at room temperature, and the resistance between B and C is 0 ohms. B and C are straight-through internally. In principle, there is no difference between B and C, but in practical applications they must be connected. There are three fixed terminals for connecting the sensor to the meter: Line A is connected to one fixed terminal of the meter that is connected to the sensor. Line B and C are connected to the other two fixed terminals on the meter. The positions of lines B and C can be interchanged, but they must be connected.

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Product Highlights:

Wide Customization (Length / Thread / Cable / Wiring)
Probe length, thread type (M12/M16/G/NPT), and 2/3/4-wire options available for OEM projects.

PT100 RTD High Accuracy (Class A / Class B Optional)
Stable measurement and repeatability for industrial temperature monitoring.

Stainless Steel Armored Sheath (SS304 / SS316 Optional)
Strong mechanical protection, suitable for harsh environments and long-term use.

Terminal Head Design, Easy Wiring & Maintenance
Convenient connection in control cabinets

Fast Quote & Short Lead Time (Factory Direct)
Support sample order and bulk production; export packing available.

Compatible with Thermowell / Insert Type (Optional)
Can be used with thermowell for high pressure / high flow applications.

Applications Ready: Boilers / Pipes / Tanks / Machinery
Suitable for liquid, gas and surface temperature measurement in industrial processes

Industry Applications

Boiler & Heating Systems – boiler water/steam temperature monitoring

Pipelines & Skids – process pipeline temperature measurement

Tanks & Vessels – storage tank / reactor temperature points

HVAC & Refrigeration – air/water temperature control loops

Machinery & OEM Equipment – automation equipment temperature feedback

Food & Beverage / Pharma (optional) – if SS316 + hygienic design is available

To quote quickly, please send: temperature range / probe length / thread / wire (2/3/4) / material (304/316) / quantity.

The following are the common applications of surface-mount RTDs:

Automotive engine temperature measurement.

Industrial electronics and temperature-centric applications.

Food processing equipment.

Boiler vessel temperature sensing.

Military and aerospace applications.

Heated surgical trays.

FAQ:

Q1: Do you offer ODM and OEM services?

A: We specialize in providing OEM and ODM services for pressure, differential pressure, level, temperature, and flow sensors.

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