Platinum Resistance Thermometers (RTD, PRT, Pt100 Sensors, Pt1000)

Platinum Resistance Thermometers, 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 Thermometers

Resistance Thermometers (Pt100, RTD, PRT) -
Mineral Insulated
various RTD, PRT, Pt100 Platinum Resistance Thermometers terminating with cable, connector and fitted terminal headsOur 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
various constructions of RTD, PRT, Pt100 Platinum Resistance Thermometers with a 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 hand held platinum resistance thermometers for general use, air temperature and immersion temperature measurements A 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
A range of RTD, PRT, Pt100 Platinum Resistance Thermometers for surface temperature measurementsA wide range of RTD sensors for surface measurements including self adhesive patch, pipe, magnetic etc.
Resistance Thermometers (Pt100, RTD, PRT)
Small diameter miniature RTD, PRT, Pt100 Platinum Resistance Thermometers1.5 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 with a reduce tip for fast response to temperature changesFast response RTD sensors ideal for industrial and other applications
Resistance Thermometers (Pt100, RTD, PRT)
Various RTD, PRT, Pt100 Platinum Resistance Thermometers for use in autoclave and steriliser applicationsRTD sensors designed specifically for the harsh environments in autoclaves
Other Popular Styles
of Resistance Thermometers (Pt100, RTD, PRT)
A range RTD, PRT, Pt100 Platinum Resistance Thermometers for specific applications such as in plastics machinery, stator slot and encased in a boltA 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.


Contact Us

About TC

FREE Guide

Privacy Policy

Terms and Conditions

FREE Wallchart Guide to
Thermocouples and RTD Sensors

Join over 500,000 engineers and buyers who have already received our FREE 74 page A3 Guide to Thermocouple and Resistance Thermometry

Company Name
  Address 1
Your Name
  Address 2
Title / Dept.
  County / Region / State
  Postcode / ZIP Code
Company Name
Your Name
Title / Dept.
Address 1
Address 2
County / Region / State
Postcode / ZIPCode

We will only ever use the information you provide to occasionally contact you regarding our products and we will never disclose your details to a third party. Our privacy policy can be viewed here

I agree to the terms and conditions listed in the Privacy Policy

View our ISO 90001/2008 Certficate
View our ISO 90001/2008 Certficate

Thermocouple Sensors
Mineral Insulated Thermocouples
Thermocouples with Mini Plug
Thermocouples with Terminal Head
Thermocouples with Cable
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
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
Mini Thermocouple Connectors – 350ºC Rated
Mini Thermocouple Connectors – 650ºC Rated
Mini Thermocouple Connector Accessories
Mini Thermocouple Connector Panels
Mini Three Pin Connectors

Standard Thermocouple Connectors
Standard Thermocouple Connectors – 220ºC
Standard Thermocouple Connectors – 350ºC Rated
Standard Thermocouple Connectors – 650ºC Rated
Standard Thermocouple Connector Accessories
Standard Thermocouple Connector Panels
Standard Three Pin Connectors
Hand Held Indicators
Panel Indicators
Temperature Transmitters
Temperature Controllers
Temperature Programmers
Temperature Calibrators
Chart Recorders
Multi Channel Indicator
DIN Rail Mounted Transmitters
Head Mounted Transmitters
ATEX/IECEx Rated Transmitters
Dry Block Calibrator
Temperature Dataloggers

Temperature Accessories
Compression Fittings
Pressure and Vacuum Feedthroughs
ATEX/IECEx Compression Fittings

UKAS Calibration Services

Pressure Gauges
Pressure Transmitters

© 1998- TC Ltd., P.O. Box 130, UXBRIDGE, UB8 2YS, United Kingdom
Tel.: 01895 252222, Fax: 01895 273540, Email:
© 1998- TC Ltd., P.O. Box 130, UXBRIDGE, UB8 2YS, United Kingdom
Tel.: 01895252222, Fax: 01895 273540, Email: