​Product Description ​ ​​The Statistical Type Coating Thickness Gauge AC-110 Series have two types: Type B ( Integral Type ), Type BS ( Separate Type ); can store 99 groups of the latest measurements; Integral Type suitable for single-hand operation, large probe with large contact surface have better stability, users can get continuous, good repetitive and precise measurements. Separate Type can provide several type probe, measure can be more flexibility. Product Parameters Measuring Range 0~1250 um 0~50mil (other range may be specified) Resolution 0.1 um (0~99.9um)/1 um (over 100um) Accuracy: 1~3%n or 2.5 um or 0.1mil (Whichever is the greater) Minimum Measurement Area 6 mm Minimal Surface F Type convex1.5 mm / concave 25 mm NF Type convex 3 mm / concave 50mm Operating Condition Temp: 0~50°C /  Humidity: <95% Size 120x63x25 mm Power Supply 2x1.5vAAA Um-4 Battery Weight 90 g (Not including batteries)