Non-contact Infrared Thermometer DT-8380Gun Type
◆ Temperature Range - 50deg C to 380degC
-58deg F ～ 716 deg F
◆Accuracy= ±2% or 2 deg C
◆ Distance Spot Ratio= 8:1
◆ Emissivity= 0.95
◆ Response Time & Wavelength : 500ms & (8-14)um
◆ Repeatability= ±1% or±1deg C
◆ Resolution =0.1 deg C or 0.1 deg F
◆ ℃/℉ Selection √
◆ Data Hold Function √
◆ Laser Target Pointer Selection √
◆ Backlight Display Selection √
◆ Auto Power Shut Off √
◆ Low Battery Indication √
◆ Power 9V Battery
◆ Product Color Yellow + Black
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notes:
1. What
is the distance to spot ratio?
D/S Ratio- Distance to Spot ratio
refers to a very important feature of your infrared thermometer. This
ratio is the size of the area being evaluated by the infrared thermometer as it
relates to distance. In other words, the area being measured becomes
larger as the distance increases. This has a profound impact on the
accuracy or precision of the reading. If the target you are measuring is
6 inches in size, and your infrared thermometer has a D/S ratio of 8:1, than
the maximum distance you can reliably measure the temperature of the target is
48 inches. Beyond this distance, not only is the target being measured,
but whatever else falls within the "spot" is being measured as
well. This means that if a very hot object is the target, and it is in
cooler surroundings, than measurements taken beyond the maximum distance will
include cooler elements, and lowering the "average" of what is in the
"spot".
D/S Ratio X Target Size, or 8:1 X 6 = maximum measure distance of 48 inches.
As the target size decreases, or the distance to the target increases, a larger D/S Ratio becomes necessary. Using the same example above, and changing first the target size, and then the D/S ratio, you can see that this formula helps you decide the correct D/S ratio and therefore the Infrared Thermometer for your needs.
D/S Ratio X Target Size, or 8:1 X 2 = maximum measure distance of 16 inches.
D/S Ratio X Target Size, or 12:1 X 2 = maximum measure distance of 24 inches.
D/S Ratio X Target Size, or 8:1 X 6 = maximum measure distance of 48 inches.
As the target size decreases, or the distance to the target increases, a larger D/S Ratio becomes necessary. Using the same example above, and changing first the target size, and then the D/S ratio, you can see that this formula helps you decide the correct D/S ratio and therefore the Infrared Thermometer for your needs.
D/S Ratio X Target Size, or 8:1 X 2 = maximum measure distance of 16 inches.
D/S Ratio X Target Size, or 12:1 X 2 = maximum measure distance of 24 inches.
D/S Ratios vary greatly, so
carefully compare this feature of IR Thermometers when comparison
shopping. This ratio, and temperature range are the two biggest factors
to consider when shopping for an Infrared Thermometer!
Ref : http://www.infraredthermometersale.com
