We are a wholesaler specializing in serving Amazon. Our products sell well in every market in the Amazon world, and we have recently entered the North American market. We welcome you to buy our products. If you have any questions, please feel free to contact us.Please confirm the product model, quantity and style before purchase.Measuring range 0~1800μmMeasuring Principle Magnetic InductionAccuracy ±(3%±1μm)Resolution 0.1μm / 1μmTechnical parameter Technical indexLCD display3 digits half number displayPower supply 9V alkaline batteryOperation current Around 14mAOperation temperature0~40℃Operation humidity10~95% RHLow battery indication7.0V ± 0.2VData Storage15 groupsProduct size67x 30x 183mmWeight147G (without battery)Condition of Objective material: Suitable for measure about non magnetic coating onmagnetic conductor base material.The base material minimum curvature radius.Protruding: 2mm Concave =11mmBase material minimum diameter: 12mmBase material limit thickness : 0.5mmMeasurement range and tolerance: Remark: H=Nominal transformation ratioRange 0~1999μmResolution 0.1um/1μmTolerance±(3%H+1)Please know how to use before use.