This unit consist of Optics, Temperature Sensor Signal amplifier, Processing circuit and LCD Display. The Optics collected the infrared energy emitted by object and focus onto the Sensor. Then the sensor translates the  energy into an electricity signal. This signal will be turned out to be digital shown on the LCD after the signal amplifier and processing circuit.
 

Temperature range	-50~420℃ (-58~788! )
Accuracy	0~420℃(32~788! ) :±1.5℃(±2.7! )       or±1.5% -50~0℃(-58~32! ):±3℃ (±5! ) Whichever is greater
Resolution	0.1℃ or 0.1!
Repeatability	1% of reading or 1℃
Response time	500 mSec, 95% response
Spectral response	5-14 um
Emissivity	0.10~1.00 Adjustable (0.95 Preset)
Distance to Spot size	12:1
Operating Temperature	0 ~40℃ (32 ~ 104! )
Operating Humidity	10~95%RH non-condensing，      up to 30℃(86! )
Storage Temperature	-20 ~ 60℃ (-4~140! )
Power	9V Alkaline or NiCd battery
Typical battery life (Alkaline)	Non-laser mode: 22 hrs;      Laser Models:12 hrs
Weight	147.5g
Dimension	153*101*43mm