Types Of Temperature Sensors
Types Of Temperature Sensors
Thermistors are known to be precise, simple to operate, inexpensive, durable, and responsive to temperature changes in a generally predictable manner. Their major drawback is that they struggle in exceedingly hot or cold conditions.

What is a temperature sensor? A device that measures the temperature of its surrounding environment provides data for analyzing the climate and making decisions. Many types, styles, and sizes of temperature sensors are available, and contact and non-contact temperature sensors are the two main kinds of temperature sensors.

 In our home, it is quite common to feel cold in winters. So, it is quite necessary for us to install temperature sensors in our home so that we can easily check the temperature in the room and make the necessary changes to stay warm. Temperature sensors come in a variety of types and sizes and if you are buying them for the first time then it is quite difficult to know which one is better for you. To get more detailed info on Room Temperature Sensors, visit on hyperlinked site.

Sensors for Contact Temperature

A few temperature meters can measure how hot or cold something is by coming into contact with it. The contact-type sensor category includes these kinds of temperature sensors, and you can use them in various temperature ranges to detect liquids, solids, or gases.


Thermocouples are voltage instruments that use a change in voltage to indicate temperature measurement. The thermocouple's output voltage increases with temperature, though not always linear. The thermocouple is frequently housed in a ceramic or metal shield that shields it from exposure to various conditions. Teflon is a popular outer coating option for metal-sheathed thermocouples, allowing for trouble-free operation in acids and potent caustic solutions. 


Thermistors are electrical resistors or resistance thermometers whose electrical resistance varies with temperature. They are made up of three or more metallic oxides arranged in a disk, cylindrical device, or bead and covered in glass, epoxy, or another impermeable substance. Thermistors are known to be precise, simple to operate, inexpensive, durable, and responsive to temperature changes in a generally predictable manner. Their major drawback is that they struggle in exceedingly hot or cold conditions.

Resistive Temperature Devices

Resistive temperature devices take advantage of another property of matter that changes with temperature, its resistance, as opposed to the thermocouple's use of a voltage. RTDs are more linear than thermocouples, progressing upward, with resistance increasing as the temperature rises. It is a highly nonlinear semiconductive device, and as the temperature increases, its resistance decreases.

Bimetallic Device

Two metals are attached to form a single strip to create bimetallic strips, also known as bimetal thermostats. When subjected to varying temperatures, these metals are meant to bend at various speeds, resulting in curvature. The two strips cling together in a straight alignment when it is chilly outside, allowing current to pass through the thermostat. Heat causes a bend in the wire, which breaks the circuit and turns off the heating or cooling switch.


The well-known liquid expansion thermometers are also used to monitor the temperature. They can be divided into two categories, the mercury type and the organic, typically red, liquid kind. The distinction between the two is significant because there are restrictions on how safely mercury devices can be supplied or moved.

Sensors for Non-Contact Temperature

These temperature meters assess the degree of hotness or coldness from the radiation released by the heat source rather than an object’s temperature while in direct contact with the sensor.The above classes are further divided into the following types of temperature sensors;


These temperature sensors measure the amount of thermal radiation emitted by a heat source or an item to determine temperatures at a distance. These temperature sensors are used in hot or dangerous conditions when it's essential to keep a safe distance from a particular body.

Digital Thermometer 

This kind of thermometer uses a thermocouple or RTD as a probe. The probe's sensor end measures the temperature, displaying the result as a digital reading. Digital thermometers are small and handy devices which come in different types. They will measure the temperature in the room in a very accurate way and display the result in the form of a graph. These thermometers are available in a wide range of sizes, so that you can get the best one for your house. 


This type of element is the most commonly used one. A thermocouple is a metal wire made up of two dissimilar metals. This wire is connected to the temperature sensing system.

Dewar Thermometer 

A dewar is a glass flask with a bulb. The bulb contains liquid nitrogen that is attached to a temperature sensor. 

Infrared camera 

An infrared camera is a device that is used to take images of an object. This device is used to check whether the temperature of the object is higher or lower than the specified temperature.

Where to buy the temperature sensors

There are many companies manufacturing the temperature sensors and you can find them in any hardware store. They will be available in different prices and you can choose the one which suits your budget. 

Installation of the temperature sensors

Before installing the temperature sensors, make sure that you have a proper knowledge about the wiring of your house and electrical circuits. You must be careful while connecting the wires to make sure that you don’t damage the electric circuit.

Once the wires are connected to the temperature sensors, you can connect the temperature sensors to the wall socket. 

How to use the temperature sensors?

The temperature sensors will show you the exact temperature in the room and you can check the temperature in your home and make necessary changes in your life.

Final Thoughts 

You must evaluate a temperature sensor's characteristics in light of your unique requirements, whether you're looking for one for a personal or industrial application. The temperature sensors mentioned above are some of the more popular ones, and take the time to investigate and comprehend each separately before choosing one.

All the mentioned temperature sensors are used to measure the temperature of the objects. These sensors are widely used in different industries to control the temperature of the products and ensure that the product is safe and secure.