This section provides overview, applications, and principles of non-contact temperature sensors. Also, please take a look at the list of 12 non-contact temperature sensor manufacturers and their company rankings.
Table of Contents
A non-contact temperature sensor is a sensor that can detect temperature without being directly attached to the object being measured. They use infrared rays emitted by an object scattered by incident neutrons and the velocity distribution of particles.
Most non-contact temperature sensors on the market are infrared sensors. The principle of operation of infrared sensors is to detect infrared radiation using a sensing element and calculate the temperature of the object being measured.
Emissivity is used to calculate the temperature. Emissivity is the amount of infrared radiation relative to the surface temperature determined for each object and is necessary when using a non-contact temperature sensor.
Non-contact temperature sensors are used in situations where it is difficult or impossible to measure with contact temperature sensors. Specifically, they are used for objects that are moving or rotating or for objects that cannot be used as products if they come into contact with them.
Examples of use are shown below:
This section describes typical infrared-based sensors.
Sensors using infrared light consist of a light-collecting lens, thermopile, amplifier, and a device that calculates temperature from emissivity.
The temperature measurement procedure for non-contact temperature sensors is described in turn.
Non-contact sensors are currently being used to measure body temperature. They are used in numerous situations, such as in restaurants and when going to work.
The advantage of using non-contact sensors compared to contact-type in cases where the body temperature is measured between the sides or mouth, is that the measurement time is shortened because the temperature can be measured quickly. Also, when measuring the body temperature of an unspecified number of people, the time required for disinfection each time is reduced, and the sensor can be used with peace of mind in terms of hygiene.
On the other hand, the disadvantage of non-contact sensors is that they are greatly affected by their external environment, such as ambient temperature and sunlight, because they use infrared rays. They are also less accurate than contact sensors. It is necessary to adjust the temperature calculation method and environmental conditions while considering the location where the non-contact sensor will be used.
There are two main types of non-contact sensor-based body temperature measurement devices in use today.
A person or a third party holds a temperature measurement device in his or her hand and places it close to the forehead or wrist to measure body temperature. They do not require a power supply and can be easily carried around as they are lightweight and compact.
The device can automatically measure body temperature without human intervention when the person to be measured stands in front of the device. Most of them are expensive because they combine face recognition technology and thermographic cameras. The device does not require the user to touch the device for measurement and depending on the device. Measurements can be taken from a distance of 0.5 to 1.5 meters.
Non-contact sensors have a fixed range and distance that can be measured. The range that can be measured is called the spot diameter. The smaller the spot diameter is compared to the object or person to be measured (the spot diameter fits within the range of the object to be measured), the more stable the temperature can be measured.
In addition, when measuring a high-temperature object, it is necessary to take measures such as blocking off the area outside the spot diameter or cooling the non-contact temperature sensors to prevent damage due to the heat generated by the non-contact temperature sensors themselves.
*Including some distributors, etc.
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Ranking as of January 2023 in United States
Derivation MethodRank | Company | Click Share |
---|---|---|
1 | Tempsens, Inc. | 33.3% |
2 | Dr. Georg Maurer | 33.3% |
3 | Pixsys | 33.3% |
Ranking as of January 2023 Globally
Derivation MethodRank | Company | Click Share |
---|---|---|
1 | Tempsens, Inc. | 33.3% |
2 | Dr. Georg Maurer | 33.3% |
3 | Pixsys | 33.3% |
Derivation Method
The ranking is calculated based on the click share within the non-contact temperature sensor page as of January 2023. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
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