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Platinum Resistance Thermometer (RTD, PRT, Pt100 Sensor)

A Platinum Resistance Thermometer, commonly referred to as RTD Sensors, PRT Sensors or Pt100 Sensors, is a type of resistance temperature sensor used for a wide variety of temperature measurement applications. There are many types of Resistance Thermometer, but typically Pt100 (made using a Platinum element with a resistance of 100 ohms @ 0ºC and typically with a 38.5 ohm fundamental interval - change in resistance over the range 0 to 100ºC), available in a wide range of designs and constructions as shown below.


We are the largest manufacturer of Platinum Resistance Thermometers (RTD sensors) in Europe. Having an enormous range of components in stock means we can make virtually any sensor you specify. We can ship custom built RTD Sensors typically within 5 days or sooner.

Typical Platinum Resistance Thermometer

Resistance Thermometers (Pt100, RTD, PRT) -
Mineral Insulated
RTD, PRT, Pt100 Platinum Resistance Thermometers Mineral InsulatedOur most popular style of RTD sensor and ideal for most applications. Vast choice of terminations e.g. pot seals, cables, connectors, heads etc.
Resistance Thermometers (Pt100, RTD, PRT) -
Rigid Stem
RTD, PRT, Pt100 Platinum Resistance Thermometers Rigid StemIdeal for rigid stem applications or where the sensor is shorter than 50mm, limited to 250°C. Wide choice of terminations
Hand Held
Resistance Thermometers (Pt100, RTD, PRT)
RTD, PRT, Pt100 Platinum Resistance Thermometers Hand HeldA range of hand held RTD Sensors to suit a variety of applications from general purpose to surface and air temperature measurements
Resistance Thermometers (Pt100, RTD, PRT) -
for Surface Measurements
RTD, PRT, Pt100 Platinum Resistance Thermometers Surface MeasurementsA wide range of RTD sensors for surface measurements including self adhesive patch, pipe, magnetic etc.
Miniature
Resistance Thermometers (Pt100, RTD, PRT)
RTD, PRT, Pt100 Platinum Resistance Thermometers Miniature1.5 and 2.0mm diameter sensors ideal for precision temperature measurements where minimal displacement and a fast response is required
Swaged Tip
Resistance Thermometers (Pt100, RTD, PRT)
RTD, PRT, Pt100 Platinum Resistance Thermometers Swaged TipFast response RTD sensors ideal for industrial and other applications
Autoclave
Resistance Thermometers (Pt100, RTD, PRT)
RTD, PRT, Pt100 Platinum Resistance Thermometers AutoclaveRTD sensors designed specifically for the harsh environments in autoclaves
Other Popular Styles
of Resistance Thermometers (Pt100, RTD, PRT) -
RTD, PRT, Pt100 Platinum Resistance Thermometers Other Popular StylesA wide range of RTD Sensors to suit many applications. Bayonet, bolt, stator slot, basic element styles etc.
Free Guide to Thermocouple and Resistance Thermometry

Resistance Thermometer Materials and Theory

Several materials are available with a predictable and stable temperature versus resistance relationship such as copper, silver and gold but platinum has considerable advantages that make it well suited to resistance thermometry.

Most industrial resistance thermometer use a platinum element with a resistance of 100 ohms at 0°C, this resistance changes as the temperature changes. Resistance Thermometers are commonly used from temperatures of -50ºC to +250ºC and are favoured over thermocouples because they have a better accuracy over this range.

A constant current is applied to the RTD and the resultant volt drop as resistance changes is measured. Assemblies wired as 2, 3 or 4-wire are available - the 3 and 4 wire versions compensating for lead resistances.

A more detailed explanation of resistance thermometer theory along with technical information and data can be found here.


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Thermocouple Sensors
Mineral Insulated Thermocouples
Thermocouples with Mini Plug
Thermocouples with Terminal Head
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High Temperature Thermocouples
General Purpose Thermocouples
ATEX/IECex Thermocouple Sensors
Ceramic Thermocouple Sensors
Fast Response Thermocouple Sensors
Autoclave Thermocouple Sensors
Surface Measurement Thermocouple Sensors
FEP Insulated Thermocouple

Platinum Resistance Thermometers
Mineral Insulated RTD Pt100 Sensors
Rigid Stem RTD Pt100 Sensors
Hand Held RTD Pt100 Sensors
Surface Measurement RTD Pt100 Sensors
RTD Pt100 Sensors with Cable
RTD Pt100 Sensors with Mini Plug
Autoclave RTD Pt100 Sensors
RTD Pt100 with Terminal Head
ATEX/IECex Platinum Resistance Thermometers
Fast Response RTD Pt100 Sensors
Air Temperature RTD Pt100 Sensors
Magnetic RTD Pt100 Sensors
Cable
PVC Single Pair Thermocouple Cable
PFA Single Pair Thermocouple Cable
Fibreglass Single Pair Thermocouple Cable
PVC Multipair Thermocouple Cable
PFA Multipair Thermocouple Cable
Fibreglass Multipair Thermocouple Cable
PVC RTD Pt100 Cable
PFA RTD Pt100 Cable
Fibreglass RTD Pt100 Cable

Miniature Thermocouple Connectors
Mini Thermocouple Connectors – 220ºC Rated
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Standard Thermocouple Connectors
Standard Thermocouple Connectors – 220ºC
Standard Thermocouple Connectors – 350ºC Rated
Standard Thermocouple Connectors – 650ºC Rated
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© 1998- TC Ltd., PO Box 130, Uxbridge, UB8 2YS, United Kingdom.
Tel.: 01895 252222, Fax: 01895 273540, Email: info@tc.co.uk
© 1998- TC Ltd., PO Box 130, Uxbridge, UB8 2YS, United Kingdom.
Tel.: 01895252222, Fax: 01895 273540, Email: info@tc.co.uk