Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference between Thermocouple & Thermistor.  thermocouple has detecting element is the voltage which induces in the to a different metallic plate. While in the case of thermistors the temperature detecting element is resistance. Both these components are devices used to detect the temperature with the different working operations. If the temperature varies the resistance of the material used in the thermistor varies. For a change in temperature, voltage produces among the electrodes of different substances in the thermocouples.

In today’s post, we will have a detailed look at both thermocouple and thermistor with the detailed and find their difference. So let’s get started with Difference between Thermocouple & Thermistor.

Difference between Thermocouple & Thermistor

Thermocouple

• There is 2 different electric connection are used in thermocouple to make electrical connection
• It work on the feedback effect to finds the voltage after measuring temperature
• They are called temperate sensors

• Normally available devices are less costly and used to measure different values of temperatures.
• They work on self-excitation and no need for separate supplies.
• They have some drawback that they are less accurate
• They employed in different industries and measure tempered at kilns and steam coming from the turbine
• They also work in homes in thermostat
• Its temperature measurement range is from -50 centigrade to 250 centigrade.
• The response time of this module is 0.12 to 10s.
• When it used to find temperature voltage induces between the electrons of thermocouples which are of different materials.
• The material used for the construction of thermocouple are Copper, iron, Constantan, Chromel, Alloys of metals like Chrome, etc
• It provides high accuracy than the thermistor.
• In instruments like ovens, refrigerators, fire alarm it uses.
• Its common applications are temperature regulation, temperature calculation, temperature compensation.
• The characteristic curve of a thermocouple is non-linear in case of a negative temperature coefficient.
• Its price is larger than the thermistor.

Thermistor

• It is a heat-sensitive device whose resistance value varies with the change in temperature.
• It is manufactured with semiconductor materials.
• The detective element of the thermistor is resistance.
• It is constructed with the Manganese, nickel or cobalt oxides, semiconductor material.
• It provides high accuracy. So we can measure a small change in temperature due to the negative temperature coefficient.
• It provides fast response time.
• Its accuracy is less than the thermocouple.
• Its measurable temperature range is two hundred centigrade to twelve fifty centigrade.
• Its response time is 0.2 to ten seconds
• The characteristic curve is linear.
• It used to find the temperature of devices used in a home.
• Its measured temperature range is -60 to 15 centigrade.
• It has two types NTC and PTC in NTC resistance drop with temperature rise and in PTC resistance rise with temperature rise.
• PTC used to control overcurrent and used in a series combination

• It uses in industries to find the temperature of machines.
• Its common applications are measurement and regulation of temperature.

That all about the difference between thermocouple and thermistor. I tried my level best to make simple this post for you. If you have any query ask in comments. Thanks for reading. Have a good day.