# MEASUREMENT OF THE TEMPERATURE WITH THE HELP OF RTD

## Abstract:

This Lab is about to measure the temperature with the help of RTD. RTD stands for “Resistance Temperature Detector”. In this experiment, the temperature of metals measures with the help of a resister temperature detector (RTD). A resistance temperature detector use to measure the temperature by the change in resistance in metals. It works on the principle of resistance and how some metals show a change in resistance when subjected to an increase in temperature. The measurement that obtain compare with the time taken with the help of different temperature measuring devices to check which gives an accurate value in a short time. Resistor temperature detectors work based on the relation between metals and temperature. When the temperature of metals increases then the resistance of metals to the flow of electricity also increases.

### Introduction of RTD

A resister temperature detector (RTD) is a process in which temperature measure with the help of a change in resistance. Resister temperature detectors are also known as resistance thermometers. It consists of a length of wire coated with a ceramic or glass core. Resistor temperature detector wire made of pure metal, nickel, or aluminum. The material has the best accuracy in resistance/temperature value.

The resistor temperature detector consists of a resistance element and isolated copper wire. Mostly, 2 wires are used in resistance temperature detectors but in some resistance temperature detectors. The main function of the resistor temperature detector is like the temperature of metals increases then the resistance to electric flow also increases. As we know that resistance measured in ohms. According to the characteristics of an element, the resistance value converted to temperature.

In the end, two values in this experiment first one is time and the other was temperature. In the end, we compare the time and temperature with other devices.

### Method of RTD

When a low amount of current is passed through the element, which is in direct relation with the resistance, is measured and converted into temperature calibration units. It means when the temperature rises, the resistance of the resistor temperature detector also rises. This measure in the temperature tested by the sensor. All the values in this experiment taken into an ambient temperature that is 25 degrees centigrade and the atmospheric pressure 1atm.

#### There are following steps are involved to perform the experiment of RTD

• First of all, connect the wires of the resistor temperature detector to terminal 1 and terminal 2. Switch on the system.
• Place the resistor temperature detector and boiled water and the thermometer in the beaker.
• Kept the switch cooled.
• In the end, noted the time with the help of a stopwatch from ambient temperature to boiling temperature.

#### Conclusion:

The experiment was about measuring the temperature and time with the help of a resistor temperature detector. We observed that when the temperature of metals increases then the resistance of metals to the flow of electricity also increases. In the experiment, we noted the values which were taken with the help of RTD and then compared these values to the different values which were measured with the help of other temperature devices. 