RTD Sensors

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.

Benefits of using RS Components RTD Sensors

Accurate Measurement of TemperatureHigh Temperature RangesImproved DurabilityConsistencyRepeatability and Reliability

Types of RTD Sensors

The most common type of RTD is a PT100. 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.

RTDs vs Thermocouples

RTD's offer several advantages over Thermocouples such as:Wider measurement of temperatureHigher accuracy than thermocouplesGood interchangeabilityBrowse our wide range of high quality RTD sensors for all types of applications.


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Description Price Sensor Type Probe Length Probe Diameter Minimum Temperature Sensed Maximum Temperature Sensed Termination Type Cable Length Probe Material Process Connection Cable Entry Size Interface Number Of Wires Accuracy Response Time
RS Stock No. 373-0372
BrandRS PRO
kr 344,30
Each
Units
PT100 100mm 6mm -50°C +200°C Cable 2m Stainless Steel Probe - - 3 Class A -
RS Stock No. 896-8395
BrandRS PRO
kr 193,73
Each
Units
- 50mm 5mm -20°C +100°C Cable 1.5m Stainless Steel - - - - - -
RS Stock No. 457-3710
BrandRS PRO
kr 980,17
Each
Units
PT100 30mm 3mm -50°C +250°C Cable 2m Stainless Steel Probe - - 3 Class A -
RS Stock No. 362-9941
BrandRS PRO
kr 700,88
Each
Units
PT100 250mm 3mm -50°C +250°C Cable 1m Stainless Steel Probe - - 4 Class B -
RS Stock No. 285-633
BrandRS PRO
kr 1 103,12
Each
Units
PT100 200mm 6mm -50°C +450°C Connection Head - Stainless Steel Probe M20 - 4 Class B -
RS Stock No. 611-8264
BrandRS PRO
kr 757,74
Each
Units
PT100 100mm 6mm -50°C +200°C Cable 2m Stainless Steel Probe - - 4 Class B -
RS Stock No. 896-8399
BrandRS PRO
kr 138,18
Each
Units
PT1000 50mm 5mm -20°C +100°C Cable 1.5m Stainless Steel - - - 2 Class A -
RS Stock No. 110-4461
BrandRS PRO
kr 455,84
Each
Units
PT100 15mm 2.8mm -50°C +350°C Lead Wire 500mm Glass Fibre Probe - - 2 Class B -
RS Stock No. 237-1613
BrandRS PRO
kr 426,81
Each
Units
PT100 35mm 6mm -50°C +250°C Lead Wire 1m Stainless Steel Probe - - 2 Class B -
RS Stock No. 891-9135
BrandRS PRO
kr 255,48
Each
Units
PT100 10mm 2mm -50°C +250°C Lead Wire 500mm Platinum Probe - - 2 Class B -
RS Stock No. 891-9151
BrandRS PRO
kr 289,72
Each
Units
PT1000 10mm 2mm -50°C +250°C Lead Wire 1m Platinum Probe - - 2 Class B -
RS Stock No. 455-4040
BrandRS PRO
kr 830,68
Each
Units
PT100 150mm 6mm -50°C +450°C Connection Head - Stainless Steel G1/2 M20 - 4 Class B -
RS Stock No. 110-4462
BrandRS PRO
kr 483,45
Each
Units
PT100 15mm 2.8mm -50°C +350°C Lead Wire 1m Glass Fibre Probe - - 2 Class B -
RS Stock No. 891-9154
BrandRS PRO
kr 256,02
Each
Units
PT1000 10mm 2mm -50°C +250°C Lead Wire 300mm Platinum Probe - - 2 Class B -
RS Stock No. 237-1607
BrandRS PRO
kr 60,01
Each
Units
PT100 10mm 2mm -50°C +500°C Solder - Platinum Chip - - 2 Class B 0.1 s
RS Stock No. 762-1134
BrandRS PRO
kr 498,34
Each
Units
PT100 25mm 3mm -50°C +200°C Lead Wire 1m Stainless Steel Probe - - 4 Class B -
RS Stock No. 666-7362
BrandRS PRO
kr 82,51
Each
Units
PT100 1.6mm 1.2mm -50°C +500°C Solder - Platinum Chip - - - Class A 0.1 s
RS Stock No. 457-3653
BrandRS PRO
kr 504,32
Each
Units
PT1000 35mm 6mm -20°C +100°C Cable 1m Stainless Steel Probe - - 2 Class A -
RS Stock No. 236-4261
BrandRS PRO
kr 680,33
Each
Units
PT100 150mm 6mm -50°C +250°C Cable 1m Stainless Steel Probe - - 4 Class B -
RS Stock No. 285-661
BrandRS PRO
kr 730,45
Each
Units
PT100 40mm 13mm -50°C +150°C Lead Wire 2m Aluminium Foil Backing, Silicone Rubber Patch Sensor - - 4 Class B -