Detailed Product Description Dial1"(25mm),2"(50mm),3"(75mm),4"(100mm),5"(125mm),6"(150mm), dish-shapedCaseStainless steelLensGlass / AcrylicStemFrom 2.5" (63mm) and upAdjustmentRe-zero adjustment screws are availableConnection1/4" or 1/2"NPT, back, bottom or adjustable angle connectionRange -100-150F/C -- 200-1000F/C,-40/120F-- 200/1000F,-80/50C -- 100/550CAccuracy±1.0%