An economical and accurate way to measure air or water temperatures. Separable thermowell. Dual scale. 1/2" NPT process connection. Dial type. Applications: hot water lines, boilers and hydronic heating. Dial: 2-1/2" aluminum dial, painted white with black and red markings. Case: aluminum. Lens: glass. Ring: steel, chrome plated. Thermowell: brass (HPB59-1), 3/4" NPT standard, separable, Sweatwell. Stem: brass. Sensing element: bi-metallic element. Pointer: aluminum, painted black. Recalibrator: standard. Accuracy: +/-1 percent. Temperature range: 30 to 250 degree F and 0 to 120 degree C.