Resistance temperature detectors (RTDs) rely on predictable and repeatable phenomena of metal resistance changing with temperature.

The most accurate leader configuration is the "real" 4-wire configuration. In a true 4-wire configuration, the resistance of the lead does not affect the resistance of the sensor.

You only measure the true Pt100 resistance when and only when the wire resistances R1 and R3 are equal. Since wire L2 is also red (and difficult to trace), you must keep all wire resistances R1, R2, and R3 equal.

RTDs typically use copper leads connected to platinum components. These leads are usually connected close to the element and close to each other (so that the two nodes are at the same temperature) to prevent Seebeck voltage from also affecting the measurement.

European standards, also known as DIN or IEC standards, are considered the global standard for Pt100 temperature sensors.

Today I want to share an article about how to eliminate/reduce the lead resistance of a 3-wire RTD temperature sensor compared to a 2-wire RTD temperature sensor. In addition, we will discuss the influence of ambient temperature on RTD measurement.

Resistance temperature sensors (RTD temperature sensors) are widely used in many industries - power, food and beverage - for temperature measurement.

Here, we will see the detailed specifications of the thermometer.In general applications, bimetallic instruments are better than filled instruments. These instruments shall have the following characteristics

The transmitter will accept various RTD temperature sensor configurations, including 2-wire, 3-wire, and 4-wire. If the transmitter is remotely mounted from a 3-wire or 4-wire RTD