Infrared Thermometer Calibrators

Infrared (IR) thermometers do not require a physical contact to measure the temperature but instead, the temperature is measured based on its reflected light specific wavelengths. These allow the users to measure the temperature of an object from the distance without interruption. GAOTek offers a wide range of infrared thermometers that are designed to provide precise temperature measurements and easy-to-use calibration for emissivity.

Technologies

New advancements have been pioneered by the instrumentations companies for infrared technologies. The new breed of Infrared technology provides better accuracy, reliability, and ease of use.

During the pioneering of new innovations, specific improvements in the Infrared design are improved and these improvements include:

l  Easier sighting – instrument companies have developed sensors that provide an integrated through-the-lens target sighting. A laser or video sighting is also added for ensuring a correct aiming and target location under many conditions. These allow the users to able to track where they are pointing the sensor and be more target of the target they are measuring. The incorporation of simultaneous real-time video monitoring and automated image recording delivers valuable new process information for documentation.

l  Higher resolution – IR thermometers offer twice the optical resolution of earlier sensor models, extending the performance in intensive processes. The higher resolution allows more accurate measurement of a very small spot in confined spaces and difficult ambient conditions. Newer innovations also provide improved signal processing capabilities such as emissivity, sample and hold, peak hold, valley hold, and functions.

l  Greater flexibility – end users can now choose IR thermometers with motorized, remote-controlled variable target focusing for fast and accurate adjustment of the focus measurement targets. Suppliers are further improving the versatility of infrared temperature measurement by supplying field calibration software, allowing the users to calibrate the sensors on site. 

l  Increased accuracy – Instrumentation designers have responded to emissivity issues associated with IR sensors by developing short wavelength units that minimized the errors due to the uncertainty of emissivity in low-temperature applications. These instruments are not as sensitive to changes in emissivity on the target than a conventional, high-temperature sensor. Providing more accurate readings across varying targets at various temperatures.

l  Greater efficiency – Industrial manufacturers are finding ways to enhanced the infrared sensing technology that can help streamline production processes. Users can pick a part number from an existing temperature set point list, automatically record each peak temperature value. This solution eliminates the sorting and increases the cycle times to provide more productivity.

Functions of Infrared Thermometer Calibrators

Unlike the contact-type probe thermometer which measure the temperature by conducting heat from physical contact of the measured object towards an object’s temperature, the IR thermometer measures the surface temperature of the object from the distance by measuring the amount of infrared energy emitted or emissivity by the object from its surface and find the differences between the Infrared rays coming from the object and surrounding environment. It does not read the internal temperature.

The emissivity of an object varies in the energy emitted, surface material, and finish, while also taking the physical factors of interfering gasses and ambient temperature thus requiring the calibration on the IR thermometer to provide a precise temperature measurement.

Infrared technology has been utilized successfully in industrial and research settings for decades and new innovations introduced that allowed the infrared thermometer to have reduced costs, increased reliability, and resulted in offering improved measurement accuracy.

There are three main classes of infrared thermometers, it includes:

l  Spot infrared thermometers in which it measures the temperature of a spot or small area on a surface. These usually projects a visible red dot onto the center of the area being measured and provide an indication where the instrument is pointed at.

l  Infrared scanning systems that can scan a larger area

l  Infrared thermal imaging cameras that measure the temperature of many spots of a larger area and it generates a two-dimensional image called thermogram. Each temperature is represented by a pixel on the screen.

Advantages offered by infrared thermometer calibrators:

l  Fast response time reaching to less than a second. Allowing for more measurements and increase data.

l  Facilitates measurement of moving targets.

l  Measurements can be taken from the distance thus avoiding contact with hazardous or physically inaccessible objects

l  Ease of measuring high temperatures (greater than 1000 °C).

l  There is no interference or energy lost from the target.

l  There is no risk of contamination and no mechanical effect on the surface of the object.

l  Several factors must be met to provide a precise temperature measurement of the target object when using an IR thermometer:

l  The target object must be optically visible to the IR thermometer. High levels of smoke or dust will make measurement less accurate.

l  The optics of the sensors must be protected from dust and condensing liquid.

l  Each infrared thermometer has a specific range of temperatures and will not be accurate if it is being used to measure objects that are not in that range.

l  Typically, only surface temperatures are measured. But different emissivity of different material surfaces is taken into account.

Features

GAOTek infrared thermometer calibrators are compact, lightweight and ease for carrying. The instruments have:

l  Simple and modern housing design: a simple one-handed operation that becomes a user-friendly instrument.

l  Precise:  non-contact measurement while also offering an

l  Other features: adjustable emissivity for calibration, laser on/off switch, automatic power off for longer use, °C/°F switch, and Max, Min functions.

Applications

In some applications where the object is required to be measured while moving, surrounded by an electromagnetic field, object is contained in a controlled or vacuumed conditions, applications where fast response is required, the object temperature is beyond the recommended use of contact thermometers, or the contact sensors can risk in affecting the target object.

Infrared thermal imaging camera is more processor intensive than spot or scanning thermometers and is used for monitoring large areas. Typical applications include perimeter monitoring, inspection or quality monitoring of manufacturing process, and equipment in enclosing space hot or cold spot monitoring for safety and efficiency maintenance purposes.

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