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TPI 368 Close-Focus Pocket Size Infrared Thermometer, Distance to Spot Ratio 1:1.3, Temp Range -7 to 248 F | TEquipment
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What is "Distance-to-Spot" (D:S) Ratio of Infrared Thermometer? - UNI-T Meters | Test & Measurement Tools and Solutions
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Amazon.com: BTMETER BT-1500 Non-Contact Pyrometer 30:1 Industrial Laser Thermometer Gun, -58℉ to 2732℉ (-50℃ ~ 1500℃) High Temp Infrared Thermometer (NOT for Human) : Industrial & Scientific
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