CLARK SOLUTIONS Infrared Thermometers Technical bulletin: Infrared Tutorial WHATIS THE HISTORY OF INFRARED TEMPERATURE MEASUREMENT? The Royal Astronomer Sir William Herschel discovered "Dark Heat" radiation in 1800. In 1880 the term "infrared" was coined. Samuel Langley invented the bolometer that measuresvariations ot rͩsistance when heated. In 1901 a bolometer could detect a cow at 400 meters. After World War II, many countries invested huge amounts of money in IR for military applications. In 2002 Radiant Innovation Incorporated designed the most compact and the most affordable IR ther-mometer (IRT), Low cost IR thermometers are achieved by using proprietary ASIC System on a Chip (SoC) technology incorporating MEMS-based advanced thermal sensors. This advanced low-power design also resulted in the longest battery life of any available IR thermometer (70hours continuous use). WHAT IS INFRARED? Infra red just like any light ray, is an Electromagnetic Radiation, with lower frequency (or longer wave-length) Anything materral above absolutc zro (-273.15 degrees Celsius or 0 Kelvin), radites in the infrared. Even iceemits infrared radiation, WHY CAN'T ISEE INFRARED? Human eyes are designed for visible light, but two species are known to detect IR: some rattle snakes and beetles. Even though IR is not visible to the human eye, your skin can sens颩 IR. When beside a campfire, you can feel the warmth of heat radiated from the fire. io i to4 io** io"4 to* io"'° 10"'* *a,*f«r>gih ■ T T T T T T V" ! T ǯ T T T IM«fft e.io'V WHAT KIND OF THEORY S TECHNOLOGY IS INVOLVED IN AN IR THERMOMETER? Quantum physics is the key theory: the total radiation energy is proportional to the fourth power of the absolute temprature (Stefan-Boltzmann law). Wien Displacement Law: the product ot the peak wave-length and the temprature is found to be a constant. Wien was awarded the Nobel Prize for Physics for theyear 1911. INFRARED - HOWIT WORKS The sensor in an IR thermometer collects a small amount of energy (usually 0.0001 watt) radiated from the target, g驩nrtes an electrical signal that is amplified by a pr颩cision amplifier and converted into voltage output. A CPU digitizes the signal by a I6bit Analog-to-Digital Converter, an Arithmetic Unit solves a temprature quation based on Planck's Radiation Law, compens驢tes for the ambient temprature and emissivity resulting in a temp魩rature reading within a fraction of a second after you push the "read" button on the IR thermometer. FAQ COMPETITIVE IR THERMOMETERS ARE MUCH LARGE R THAN CLARK'5. CLARK IRTS ARE AS SMALL AS THE BATTERY OF SOME TRADITIONAL IR THERMOMETERS. IS ACCURACY COMPROMISED? Accuracy is not compromised. Each IR Thermometer has a test report in our calibration database, which is traceable by the sriai number. Calibration tests adhre to "ASTM E1256. Test Methods for Radiation Thermometers (Single Waveband Type)" Clark Solutions» 10 Brent Drive 騕 Hudson, MA 01749 Tel.978/ 5681400 Օ Fax 978 / 568 0060

CANIR THERMOMETER ME A SURE AIR TEMPERATURE? Yes and no. No, because air (i.e.( Oxygen and Nrtrogen molcules) does not mit infrared radiation. However, you can aim an IR thermometer at anything having the SAME temp驩rature as the air such as a leaf or grass (under sunshade) or indoors such as your desk, a pice of paper having the same tempra詭ture as the air The kev to measuring "air temprature" is to measure anything that should have the same temprature as fhe air". CAN I MEASURE THE BODY TEMPERATURE OF AN ANT BY INFRARED MEASUREMENT TECHNOLOGY? You can aim the IR thermometer at small object such...