Measuring and Layout — FAQ
Can these infrared thermometers measure human body temperature?
No. These IR thermometers are designed for surfaces, not medical use. Medical thermometers use different algorithms and FDA approval. For body temperature, buy a dedicated forehead or ear thermometer to ensure accuracy and safety.
Why does my reading change when I move closer to the target?
You're experiencing distance-to-spot ratio limitations. The measurement area grows larger with distance. Move too close and you exceed the sensor's focus. Always maintain the manufacturer's recommended distance—usually 6-14 inches for 16:1 ratio units.
What's the difference between adjustable and fixed emissivity?
Adjustable emissivity lets you match the thermometer to the surface material—crucial for accuracy on shiny metals, dark surfaces, or food. Fixed emissivity (typically 0.95) works for most dark, non-reflective surfaces but reads 10-20% high on aluminum or stainless steel.
How do I know if my thermometer is accurate?
Test it on boiling water (212°F at sea level) and ice water (32°F). Quality units should read within ±2°F. If it's off, check for adjustable emissivity settings. No budget IR thermometer offers user calibration—you'll need to replace it if accuracy drifts.
Can I use these for pizza ovens over 1000°F?
Only the Etekcity 800 (1382°F max) and TempPro models (1022°F max) handle pizza oven temperatures. Others will display 'HI' or error codes. Always check max temperature rating before measuring extreme heat to avoid sensor damage.
Why do some units have two lasers?
Dual lasers outline the edges of the measurement circle, showing exactly what area you're reading. Single laser only marks the center point. Dual lasers improve accuracy on small targets like brake rotors or pizza stones by preventing off-center readings.
