RTD Coefficient Calculator

Formula

The formula to calculate the RTD coefficient is:

\[ RTD = \frac{R2 - R1}{T2 - T1} \]

Where:

\( RTD \) is the Resistance Temperature Detector coefficient (Ω/°C)
\( R1 \) is the resistance at temperature T1 (Ω)
\( R2 \) is the resistance at temperature T2 (Ω)
\( T1 \) is the initial temperature (°C)
\( T2 \) is the final temperature (°C)

Definition

RTD Coefficient: Also known as the temperature coefficient of resistance, it measures how much the electrical resistance of a material changes with a change in temperature. This coefficient is crucial in the design and use of resistance temperature detectors (RTDs), which are sensors used to measure temperature by correlating the resistance of the RTD element with temperature.

Example

Let's say the resistance at temperature T1 (R1) is 100 Ω, the initial temperature (T1) is 0 °C, the resistance at temperature T2 (R2) is 138.5 Ω, and the final temperature (T2) is 100 °C. Using the formula:

\[ RTD = \frac{138.5 - 100}{100 - 0} \]

We get:

\[ RTD = 0.385\, \text{Ω/°C} \]

So, the RTD coefficient is 0.385 Ω/°C.