For measurement of non-magnetic coatings e.g. paint, powder coating. plastic, rubber, hot-dip galvanising, electroplating, bitumen, metal spray coatings, etc. on magnetic metals (steel / ferrous base). Iron is magnetic and most of the remaining materials are non-magnetic. Statistical: Number of Reading, Average, Standard Deviation, Max. & Min. are updated with every reading and displayed simultaneously. Integrated microprocessor -Auto power off.