July 2019

WHAT IS EMISSIVITY AND HOW DO YOU KNOW WHICH EXERGEN GLOBAL IRT/C SENSOR FITS YOUR SOLUTION BEST?

WHITE PAPER: THROUGH THE LOOKING GLASS

“It’s all done with mirrors!’’

“What do I see when I look in my mirror?” asked Alice. “I see myself, of course.”

“But what about the mirror why can’t I see the mirror itself” she pondered. “Maybe it’s because the mirror is invisible? Na, if it were, I would be able to see the wall behind it.” Just then she had an idea, “I know, if I put spots of crayon on the mirror, then I can see the mirror!”

She put spots of crayon on the mirror and sure enough, she could see the mirror, wherever she put the spots! “The crayon spots are now part of the mirror, and I can see them!”

“Hmm . . .” she thought. “I still can’t see the whole mirror. All I can see is the part covered by the spots. In between, I still see my face, not the mirror.”

A magical white rabbit who had been watching Alice appeared and said, “Why, my dear girl, you are almost there! A little further and you will understand the concept of EMISSIVITY!”

“Emissivity?” queried Alice. “What is that?”

Read the full White Paper here

THE EXERGEN GLOBAL PRODUCT SELECTOR

Not sure which sensor of Exergen Global fits your application? You can use our Product Selector to select the specifications you need for your solution. The website will then return the best fitting sensors for you!

Check out the Product Selector here!

TIPS & TRICKS IN THE IR MARKET

Aren't you amazed at how a human eye works? These two small spheres in your head manage to do effortlessly what even the biggest, most sophisticated cameras can not do. They can aim your view and focus to get a sharp image (not an easy task as the signals from both eyes need to be combined), they can adjust to changing light intensities, detect even the smallest changes in colour and shape, and your brain can process this information on the fly. You often take your ability to see for granted, but if you think about it for a while, it is very extraordinary.

Infrared sensors function in a similar way as your eyes: they detect infrared radiation and convert it into a signal to process. Only infrared sensors don't pick up the visible ligth, but the invisible light that is heat. The analogy between eyes and non contact temperature sensors can be extended a little further to provide you with some tips and tricks that will help you to get a better and more accurate temperature measurement:

1) Do you ever read a newspaper from a distance of 6 meters? It would be possible if you are an eagle, or if you have a set of binoculars. It's much easier to read the paper from a smaller distance. The same holds for measuring temperatures of objects with a sensor: it is possible to do it from a large distance, but it is better and easier if you can get the sensor close to the object. Note that it is not always possible to get close to the object, for instance if there are mechanical obstructions or the target is too hot.

Read the rest of the tips here!