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### What are RTD Sensors?

Resistance Temperature Detectors or RTDs are used to sense varying temperature ranges and levels of resistance in industrial and commercial applications. An RTD consists of a resistance element and insulated copper wires.

The resistive element is usually made of platinum, nickel, nickel-iron, or copper as these materials are have high accuracy, fast response time, and a wide temperature range. The main function of an RTD is to probe increases and decreases in temperature and control them accordingly.

### How do RTD Sensors work?

RTDs use a sensor to detect changes in temperature. The metal component or RTD resistor is situated in proximity to where the temperature measurement needs to occur. As the electrical current passes through the metal, the resistance element measures the electrical current being passed through it. When the temperature of the metal increases, the RTD increases the electrical resistance, which is measured in Ohms.

The resistance value can be converted into temperature and the resistance ratio can vary based on the element used for the resistor. The flow of electricity is then decreased, subsequently reducing the temperature.

**Types of RTD Sensors**

The most common type of RTD is a [pt100](https://uk.rs-online.com/web/c/automation-control-gear/sensors/rtd-sensors/?applied-dimensions=4294785690). A PT100 sensor is typically the most accurate temperature sensor with high levels of stability and repeatability. The Pt100 is a laboratory-grade sensor as it is IEC 60751 compliant.

Pt1000's are also available at similar temperature ranges and tolerances, however, a pt1000 will have a resistance value reading ten times higher than the pt100 for the same temperature. Two, three and four wire sensors are used in RTD sensing circuits.

RTD circuits are configured so the sensor's resistance can be accurately calculated. The lead wire used between the resistance element and measuring element also has it's own resistance, so two, three, and four-wire sensors provide a means of compensating errors in temperature and resistance measurement.

**Benefits of using RS RTD Sensors**

- Accurate
- Temperature Measurement
- High Temperature Ranges
- Improved Durability
- Consistency
- Repeatability and Reliability

**RTDs vs Thermocouples**

RTD's offer several advantages over Thermocouples such as:

- Wider measurement of temperature
- Higher accuracy than thermocouples
- Good interchangeability

Browse our wide range of high quality RTD sensors for all types of applications.



Shop our range of RTD Sensors supplies & accessories. Also known as pt100 Sensors, next day delivery is available on all of our pt100 and RTD Sensor offers.

RTD Sensors | pt100 Sensors | RS

RTD Sensors

Endress+Hauser PT100 Temperature Sensor 100mm Long 0.5 K +200°C Max

Endress+Hauser PT100 Temperature Sensor 200mm Long 0.5 K +200°C Max

Turck PT100 RTD Sensor 150mm Long, +650°C Max

Turck 1 Channel Galvanic Barrier RTD Thermocouple

Turck 1 Channel Galvanic Barrier RTD Voltage Input

Buy from our selection of Rtd Sensors from Omron. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Omron RTD Sensors | RS

Precisely measure temperature with reliable RTD sensors from Honeywell. Available with next-working-day delivery from RS Components.

Honeywell RTD Sensors | RS

<p>Our range of Honeywell RTD sensors provides optimal temperature change detection functionality, perfect for a variety of commercial and industrial applications. Honeywell RTD sensors offer long-term stability across wide temperature ranges, assuring reliability with capable fibreglass lead wires and ceramic case material. Honeywell PT100 RTD sensors are IEC 60751 compliant and offer laboratory-grade performance.</p><h2>How do they work?</h2><p>RTDs—or Resistance Temperature Detectors—detect changes in electrical resistance present within a metallic resistive element. Resistance within the element increases as the temperature around the probe increases, allowing the sensor to detect temperature change using a resistance ratio that converts the resistance change into a measurement of temperature.</p><h2>Which configurations exist?</h2><p>Various configurations of RTDs exist, with differing resistance metals including copper, nickel, nickel-iron, and platinum. Our range of Honeywell RTD sensors use a thin film of platinum for high-accuracy sensing. Wire material and probe width and length are also configurable within our selection of sensors.</p><h2>Why are they useful?</h2><p>RTDs are useful temperature sensors for automated temperature control in industrial settings, they provide a fast response time and can allow systems to quickly respond to changes within a specified temperature range. They have typical applications in HVAC, instrumental assemblies, and process control.</p>

Buy Turck RTD Sensors. Browse our latest Turck RTD Sensors offer. Free Next Day Delivery!

Turck RTD Sensors | RS

<p>Turck RTD Sensors exemplify cutting-edge temperature sensing technology, offering unparalleled accuracy and reliability. These sensors are crafted with meticulous attention to detail, ensuring optimal performance across diverse industrial applications. Renowned for their robust design and advanced features, Turck RTD Sensors stand as a testament to precision engineering.</p><p>With a focus on delivering consistent and precise temperature measurements, Turck RTD Sensors are the epitome of reliability in temperature sensing solutions. These sensors boast a wide temperature range and are adept at maintaining accuracy even in challenging environments. Their durable construction ensures longevity, making them an ideal choice for demanding industrial settings.</p><p>Turck RTD Sensors are engineered to meet the exacting standards of industries where temperature control is of utmost importance. From manufacturing processes to quality control, these sensors play a crucial role in ensuring optimal operational conditions. Trust in Turck RTD Sensors for a seamless blend of innovation, durability, and accuracy in temperature sensing technology.</p>

Turck RTD Sensors

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