Tel-Tru 42100209 Model Aa575R Resettable Bi-Metal Process Grade Thermometer, Stainless Steel, 5" Dial, 1/2" Npt Adjustable Angle Back Connection, 0.250" Diameter x 2.5" Long 304Ss Stem, 50/500 Degree Fahrenheitahrenheit and 0/250 Deg Celsius, +/- 1% Full