Fluke 481 Radiation Detection Meter, LCD Display, -4 to 122 Degrees F Operating Temperature Detects skin-dose (beta particle) and deep-dose (gamma) and X-ray radioactivity Requires no adjustments; simple 2 button process Provides promptly read, correct value through auto ranging capability Easily visible inside truck trailers and other low-light situations with automated backlight Works dependably inside or outside thanks to sealed case