Non Contact Temperature Sensors

Non-Contact Temperature sensors utilize the principle of absorption and emission. Absorption occurs when something is heating up. Emission occurs when something is cool down, and its atoms emit heat. To make temperature measurement with such a temperature sensor, a probe is used with an infrared detector to detect heat emission.

Principle of non-contact temperature measurement

The non-contact temperature sensor utilizes radiation on and convection for checking the change in the temperature. It can be utilized to identify the gases and fluids that produce energy, which is sent as infra-red radiation. Non-contact temperature measurement is a highly evolved sensors that have a widespread application in industrial processing.

Non-contact temperature measurement alludes to detect the temperature of a body using the infrared produced by it. It is a preferred tiny, moving, or not reachable object that requires a quick response. Understanding the fundamentals of temperature Measurement techniques, devices, and the various accessible features can help you choose the best non-contact temperature measurement detector for a specific application.

Types of non-contact temperature measurement devices


A Pyrometer is also known as an Infrared thermometer. It is an instrument used to detect heat emitted from objects, also called radiography, by the surface. Pyrometer is majorly used in industrial processes where the measurement and control of temperature are vital for productivity and quality. There are two types of pyrometers available in the market named optical and infrared pyrometers.

  • An optical pyrometer uses radiation to measure the temperature of the object. Optical pyrometers measure the radiation from the object in a narrow band of frequencies of the thermal spectrum. These instruments are also called single colour pyrometers.
  • An infrared pyrometer is a special thermometer that infers heat from a specific portion of the radiant thermal radiation produced by the object being thermography, usually in a dark room. This type of thermometer has an integrated camera to monitor the temperature of a specific area. The infrared radiation comes from the surface and any nearby air. The camera is usually built right into the device.

Thermal Imaging System

An infrared thermal scanner is a device that creates an infrared image by using infrared radiation, just like a typical thermal camera that forms an invisible image on a black surface by using visible light. One of the most common uses for thermal scanners is to measure the skin temperature of individuals. With this equipment, the user can easily assess their current state of health and monitor their body changes as they age. During cold seasons or in winter, when the skin tends to remain cool, individuals may feel shivering or even experience being overly cold. Through the use of such a scanner, these persons can be made aware of the possibility of heat loss and increase the person’s alertness level to avoid sudden or excessive heat loss.

Thermal imaging has many other uses apart from a medical diagnosis. For example, manufacturers use it to track, diagnose, and monitor problems with equipment and ensure the proper functioning of the product. In the case of thermal scanning, it helps prevent corrosion of metallic parts and help maintain the system’s integrity.

Furnace monitoring system

A furnace monitoring system is the most efficient way to monitor the performance of furnaces, especially when the manufacturers are unaware of the condition of their equipment and fail to establish the reason(s) behind a sudden drop in furnace performance. With modern-day furnaces being operated in a highly complex manner, a data logger that is designed for this purpose can quickly alert the manufacturer to potential problems. This enables the manufacturer to take corrective measures before these problems are allowed to affect production adversely and adversely affect processes. Therefore, furnace monitoring is the most efficient way to ensure that furnaces are operating consistently.

Industries need to have a Furnace monitoring system because it helps maintain the working condition of the equipment. It also helps in improving the performance of the equipment. The temperature monitoring in industries should be done with utmost care and attention to avoid any system malfunction.


One of the most important advantages of using a non-contact thermometer to take a temperature is its reliability. This means that temperature readings taken with this type of device are more accurate and reliable than those taken with a traditional thermometer. In addition to this, the device is portable and can easily be transported to different places.

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