Thermocouples

A thermocouple is essentially a temperature sensor (a device that measures temperature). It is made up of two wires of different metals that, when joined together, create an electrical junction. When the temperature changes at the junction it creates a voltage that can be interpreted to read the temperature. This is also known as the Seebeck effect. You can read more about these tools in our bespoke Thermocouples Guide.

Types of thermocouples

There is a wide range of thermocouples available, each with different characteristics, such as temperature range and their robustness. Each thermocouple is defined by a letter such as K-Type. Common types include J, K, L and T. The letters refer to the type of materials used and therefore the temperature they are usable at. For example, type J is iron and copper-nickel and is useable from around 0°C to 816°C, depending on other characteristics. Some thermocouples come with an additional sheath that insulate the wires to prolong their life.Thermocouples are ideal tools for the measurement of high temperatures and are a robust yet affordable solution.What are Thermocouples used for?ThermostatsHospital thermometersVehicle diagnosticsBoiler/heating sensorsOven safety featuresFood thermometersIndustrial probe sensor


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Description Price Thermocouple Type Probe Diameter Probe Length Maximum Temperature Sensed Probe Material Minimum Temperature Sensed Series Termination Type Cable Length Standards Met Response Time Calibrated Hazardous Area Certification Accuracy
RS stock no. 621-2170
BrandRS PRO
R 136.47
Each
units
K 0.3mm 2m +400°C Glass Fibre - - Cable 2m RoHS Compliant 0.7 s - - -
RS stock no. 373-0372
BrandRS PRO
R 347.80
Each
units
PT 100 6mm 100mm +200°C Stainless Steel - - Cable 2m - - - - -
RS stock no. 100-7532
Mfr. Part No.NB-PTCO-160
R 36.05
Each
units
PT 100 0.3mm 2.3mm +600°C - - - Lead - - 0.2 (Water) s, 10 (Air) s - - -
RS stock no. 363-0250
BrandRS PRO
R 130.87
Each
units
K 1/0.2mm - +250°C - -75°C - Miniature Plug 1m IEC - - - -
RS stock no. 409-4908
BrandRS PRO
R 123.06
Each
units
K 0.2mm 1m +250°C Nickel Aluminium, Nickel Chrome - - Miniature Plug 1m RoHS Compliant 0.1 s - - -
RS stock no. 285-633
BrandRS PRO
R 1,491.53
Each
units
PT 100 6mm 200mm +450°C Stainless Steel - - Connection Head - - - - - -
RS stock no. 847-1132
BrandRS PRO
R 310.90
Each
units
K 1.5mm 150mm +1100°C Stainless Steel - - Cable 100mm ANSI - - - -
RS stock no. 370-6587
Mfr. Part No.D00538/PS6/50/2000/PT100/SMS3
BrandCorrege
R 542.29
Each
units
PT 100 6mm 50mm +100°C - - - Cable 2m - - - - -
RS stock no. 181-1980
BrandRS PRO
R 110.87
Each
units
PT 100 2mm 10mm +600°C - - - Solder - - 1 m/s - - -
RS stock no. 409-4920
BrandRS PRO
R 140.12
Each
units
K 1.2mm 1m +450°C Nickel Aluminium, Nickel Chrome - - Miniature Plug 1m IEC 0.1 s - - -
RS stock no. 621-2271
BrandRS PRO
R 308.27
Each
units
K 6mm 2m +350°C Stainless Steel - - Cable 2m RoHS Compliant 0.7 s - - -
RS stock no. 621-2158
BrandRS PRO
R 61.292
Each (In a Pack of 5)
units
K 2mm 1m +250°C Teflon PTFE - - Cable 1m RoHS Compliant 0.5 s - - -
RS stock no. 362-9941
BrandRS PRO
R 905.36
Each
units
PT 100 3mm 250mm +250°C Stainless Steel - - Cable 1m - - - - -
RS stock no. 290-5036
BrandRS PRO
R 599.86
Each
units
K 1/0.2mm 40mm +150°C Aluminium Foil Backing, Silicone Rubber - - Cable 1m IEC - - - -
RS stock no. 397-1264
BrandRS PRO
R 466.28
Each
units
K 3mm 150mm +1100°C Stainless Steel - - Cable 1m IEC - - - -
RS stock no. 896-8395
BrandRS PRO
R 334.14
Each
units
PT 100 5mm 50mm +100°C Stainless Steel - - Cable 1.5m - - - - -
RS stock no. 455-4040
BrandRS PRO
R 1,142.43
Each
units
PT 100 6mm 150mm +450°C Stainless Steel - - Connection Head - - - - - -
RS stock no. 548-8635
Mfr. Part No.902020/10-402-1001-1-9-250-104/395,330 (0..100°C)
BrandJumo
R 3,713.79
Each
units
PT 100 9mm 250mm +100°C Stainless Steel - - Connection Head - - - - - -
RS stock no. 872-2562
BrandRS PRO
R 539.82
Each
units
K 4.76mm 75mm +350°C Stainless Steel - - Cable 2m IEC - - - -
RS stock no. 362-9834
BrandRS PRO
R 79.41
Each
units
PT 100 2mm 2.3mm +500°C Platinum - - Solder - - 0.1 s - - -