Introduction: This Digital Surface Profile Gauge is a handheld gauge for fast and accurate measurement of the peak-to-valley height of the surface profile of blast cleaned surfaces. It meets the standards of ASTM D 4417-B,IMO MSC.215(82),SANS 5772,US Navy NSI 009-32,US Navy PPI 63101-000. Suitable for the laboratory and for use in harsh field conditions. Accurate, immediate and repeatable results. The tungsten carbide tip will last for up to 20,000 readings and can then be easily replaced by the user in the field. Used the exclusive Micro -computer LSI circuit and crystal time base to offer high accuracy measurement. Widely used in field of blast cleaned surface measurement. If the profile is too large the amount of coating required to ensure adequate coverage increases, otherwise there is a danger that the peaks remain uncoated - allowing rust spots to occur. If the profile is too small, there maybe an insufficient key to produce adequate adhesion, leading to premature coating failure . Ensuring the correct surface preparation optimises the performance of the coating and material usage. Specification:Display:LCD Range:0 μm to 800 μm (0 mils to 30 mils) Accuracy: ±5% or ±5 μm, (whichever is the greater) Resolution: 1 μm (0.1 mils) Metric and Imperial switchable PC interface:RS232C Measurement speed: >30 (readings per minute) Power off:2 modes (Manual off at any time by depressing the power key till OFF shows on the display or Auto power off after 3minutes from last key operation.) Case: High impact ABS Batteries: 4x1.5v (AAA) battery Accessories:Main unit Carrying case Operation manual Optional Accessories:RS232C cableUSB adaptorBluetooth interface