Achieving the proper paper temperature throughout the corrugated production process is critical to the production of flat, well bonded cardboard. For instantaneous measurement of paper or board temperature, there is no better instrument than the portable infrared (IR) pyrometer.For machines without automatic temperature control, the non-contact pyrometer is the only practical means of temperature control.Safety is another important advantage of using infrared pyrometers.Because it does not need to touch the moving parts, there is no danger of burns can measure the temperature.Infrared gun carton plant has now become a standing instrument is also a good reason.But their function is often misunderstood.

How they work?

As we all know, iron heated to a high temperature will be white to almost white, so there is a term called "hot metal" energy emitted from the metal to become visible light.When the temperature decreases, the metal will be yellow, then red. Temperature and then lower, it will no longer dazzling, but still the same as the radiation energy of light.The frequency of this light is lower than the red light, the human eye is not visible. It is called infrared. Hot objects radiate energy in the form of infrared radiation.

Infrared guns do not measure temperature directly; they measure infrared radiation only. This difference is important because, although the total amount of infrared radiation emitted by an object is proportional to its temperature, it is quite different from the radiation coefficient of its surface.

Be aware that any particles or vapors such as dust and smoke can affect the accuracy of the readings.

How the surface affects the reading?

Emissivity is the actual effectiveness of a surface emitting energy in the form of thermal radiation (infrared), expressed as a percentage.A "blackbody" (the object that absorbs all radiant energy) is a theoretical standard with an emission coefficient of 100%.The total amount of infrared radiation on any given surface varies with the color and surface smoothness.The brightest surface radiates the least and the rough, darkest surface radiation is maximum.

If you know the correct radiation coefficient of the target object, some infrared gun radiation coefficient can be adjusted.Irreducible infrared gun radiation coefficient is generally set at 95%, and flat black paint.Fortunately, the radiation coefficient of kraft card is 95%, so very easy to use in the carton factory.