Type K Thermocouple Manufacturer,Supplier and Exporter in India
Product Code : EL-TWL-9196
Jlab Export is a leading Type K Thermocouple Manufacturer,and suppliers in India
A type K thermocouple measures temperature from the small voltage made where its two alloy conductors, nickel-chromium and nickel-alumel, are joined. It is the most common thermocouple type and works continuously up to around 1,100 °C. Its relative radiation hardness is the reason it also turns up in nuclear applications.
Specifications
| Thermocouple type | K |
| Conductors | Nickel-chromium / nickel-alumel |
| Maximum continuous temperature | Around 1,100 °C |
| Notes | The most common thermocouple type; used in nuclear applications for its relative radiation hardness |
| Minimum order quantity | 5 units |
| Dispatch time | Usually 7–10 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Practicals with the Thermocouple
Students first see the Seebeck effect for themselves. With the thermocouple on the lowest DC millivolt range of a Multimeter, Digital, they warm the junction in water and watch the voltage rise with temperature. Repeating the run with a Copper Constantan Thermocouple shows that each pair of metals gives its own voltage for the same temperature.
The Thermocouple Calibration Test Rig checks the reading at the ice point and in boiling water, which gives a two-point calibration line. For higher temperatures, a class can compare the chamber temperature of a Muffle Furnace with its own controller, keeping below the thermocouple’s continuous limit.
Frequently Asked Questions
How does a thermocouple give a temperature reading?
Two different metals joined at one end produce a small voltage when that junction is hotter or colder than the free ends. The voltage, a few millivolts, grows with the temperature difference. A meter or logger with a type K input converts it to degrees.
What is cold junction compensation?
A thermocouple reports the difference between the hot junction and the cold end where it meets the meter. Instruments with a thermocouple input measure the cold end and add it in. In a simple practical, keep the reference junction in melting ice instead.
Which wire is positive on a type K thermocouple?
The nickel-chromium conductor is the positive leg and the nickel-alumel conductor is the negative leg. If the leads are swapped, the reading moves the wrong way as the junction heats.
Can I extend the leads with ordinary copper wire?
Use type K extension wire instead. Copper joined to the thermocouple wires makes extra junctions, and any temperature difference along them adds an error to the reading.
Why is type K used so widely?
It covers temperatures up to around 1,100 °C in continuous use, from warm water up to furnace work, and readers for it are common. Its relative radiation hardness also suits it to nuclear applications.
Other Thermocouples and Temperature Sensors
- Temperature Sensor (analog output, linear with Celsius temperature)
- Thermocouple Trainer Kit
- Platinum Resistance Thermometer
- Datalogger
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Last updated: 6 November 2026
