Klutch Non-Contact Digital Infrared Diagnostics Thermometer — 12:1 Distance-to-Sight Ratio | Northern Tool
Amazon.com: ROKTEK T2500 Infrared Thermometer, Non-Contact Digital Temperature Thermometer -58 to 716°F (-50 to 380°C), 12:1 Distance to Spot, Standard Size, Black, Backlit Display : Industrial & Scientific
Proper use of noncontact infrared thermometry for temperature screening during COVID-19 | Scientific Reports
Detecting elevated body temperatures is often our first line of defense
Noncontact Temperature Measurements Using IR Thermometers | ACHR News
Distance Spot Ratio of Infrared thermometers.
TPI 368 Close-Focus Pocket Size Infrared Thermometer, Distance to Spot Ratio 1:1.3, Temp Range -7 to 248 F | TEquipment
Temperature Measurement Strategies | 2011-11-01 | Process Heating
Should I Have a Thermal Camera in My Tool Bag? | 2016-02-15 | ACHRNEWS | ACHR News
About Infrared (IR) Thermometers: Distance to Spot Ratio – Sper Scientific Direct
Optical resolution
Infrared Thermometer with Laser Pointer - PosiTector IRT
Steps to determine if the size of your source is too small
Amazon.com: Performance Tool W89721 Non-Contact Digital Laser Infrared Thermometer, Orange and Black With 12:1 Spot Ratio : Industrial & Scientific
Klein Tools Digital Infrared Thermometer, Dual Laser IR5 - The Home Depot