FUNCTION: CM-8826F (FERROUS SUBSTRATE) CM-8826N (NON FERROUS SUBSTRATE) CM-8826FN (F & NF TYPE) MEASURING PRINCIPLE:MAGNETIC INDUCTION& EDDY CURRENT MEASUREMENT RANGE:0-200um/500um /1000um/2000um RESOLUTION:0.1 um(under 100um) 1um (over 100um) ACCURACY: +/-1--3%n or +/-3um PROBE TYPE RECOGNITION: AUTOMATIC (FOR CM-8826FN) MEASUREMENT WAY: SINGLE/CONTINUOUS DATA OUTPUT: RS232C INTERFACE SEPARATE PROBE POWER SUPPLY: 4x1.5V AAA(UM-4)BATTERY 2 SHUTDOWN MODELS: MANUAL/AUTOMATIC DIMENSION: 131x65x28mm