It's never a good idea to guess with measurements, that's what measuring tools are for. You get great flexibility since it runs on a battery and lacks a cord that can restrict your
From Amazon
testo 830-T1 - Infrared Thermometer
AC One
Testo 830 Infrared Thermometer
Conrad Electronic
testo 830-T1 IR thermometer Display (thermometer) 10:1 -30 - +400 °C