What Is Resistance Thermometer

This wire is referred to as a temperature sensor.

What is resistance thermometer. Resistance thermometers are usually used to measure temperatures between 200 and 500 c. The industrial resistance thermometer is a combination of a thermometer bulb a measuring circuit and an automatic balancing potentiometric instrument. It is commonly known as resistance temperature detector rtd and is an accurate temperature sensor. The rtd wire is a pure material typically platinum nickel or copper.

This factor is represented by the greek lower case letter alpha α. The resistance change factor per degree celsius of temperature change is called the temperature coefficient of resistance. The resistance thermometer is based on the fact that the electrical resistance of a metal increases linearly with temperature. What is an rtd pt100 resistance thermometer sensor.

A resistance temperature detector also known as a resistance thermometer or rtd is an electronic device used to determine the temperature by measuring the resistance of an electrical wire. Resistance thermometer is a device that is used to determine temperature by the variation in the resistance of the conductor. Although the resistance of a conductor changes with the size of the conductor e g. A positive coefficient for a material means that its resistance increases with an increase in temperature.

A simple resistance thermometer could incorporate a platinum wire resistor a battery as a source of electrical potential and an ammeter to measure current which could then be calibrated to indicate temperature. Thicker wires have less resistance to current flow than thinner wires the resistance of a conductor also changes with changing temperature. If we want to measure temperature with high accuracy an rtd is the ideal solution as it has good linear. Resistance thermometers also called resistance temperature detectors rtds are sensors used to measure temperature.

Resistance thermometers work by changing resistance with a change in temperature in a repeatable manner. Resistance thermometer definition the resistance thermometer or resistance temperature detector rtd uses the resistance of electrical conductor for measuring the temperature the resistance of the conductor varies with the time this property of the conductor is used for measuring the temperature the main function of the rtd is to give a positive change in resistance with temperature. What is an rtd resistance temperature detector. The thermometer bulb is manufactured in various forms and consists of a thin wire coil wound in insulating material.

How temperature changes resistance.