This instrument is compatible with four standards of  site to measure surface roughness of various machinery-processed parts, calculate corresponding and clearly display all measurement parameters. When measuring the roughness of a surface, the sensor is placed on the surface and then uniformly slides along the surface by driving the mechanism  by the sharp built-in probe. This roughness causes displacement of the probe which results in change of inductive amount of induction coils so as to generate analogue signal, which is in proportion to the surface roughness at output end of phase-sensitive rectifier.
The exclusive DSP processes and calculates and then outputs the measurement results on LCD.
* Multiple parameter measurement: Ra, Rz, Rq, Rt
* Highly sophisticated inductance sensor
* Four wave filtering methods : RC, PC-RC, GAUSS and D-P
* Built-in lithium ion rechargeable battery and control circuit with high capacity
* Small in size, light in weight and easy to use
* Can communicate with PC computer for statistics, printing and analyzing by the optional cable
  and the software for RS232C interface.
*Manual or automatic shut down. The tester can be switched off  by pressing  the Power key at
 any time. On the other hand, the tester will power itself off about 5 minutes after the last  key
 operation.
*The tester can memorize 7 groups of measurement results and measuring conditions for later use or
   download to PC.
*Metric /Imperial Conversio

SPECIFICATION
   Display： 4 digits, 10 mm LCD, with blue backlight
   Parameters:  Ra, Rz, Rq, Rt
   Measuring Range
     Ra, Rq:  0.005-16.00um/0.020-629.9uinch
     Rz,Rt:   0.020-160.0um/0.078-6299uinch
   Accuracy: Not more than ?0%
   Fluctuation of display value: Not more than 6%
   Sensor :
     Test Principle: Inductance type
     Radius of Probe Pin: 5祄
     Material of Probe Pin: Diamond
     Dynamo-measurement of Probe: 4mN(0.4gf)
     Probe Angle: 90?
     Vertical Radius of Guiding Head: 48mm
   Maximum driving stroke:  17.5mm/0.7inch
   Cutoff length (l): 0.25mm / 0.8mm / 2.5mm  optional
   Evaluation length:  5l
   Driving speed:
     sampling length = 0.25mm   Vt=0.135mm/s
     sampling length = 0.8mm    Vt=0.5mm/s
     sampling length = 2.5mm    Vt=1mm/s
     returning                                Vt=1mm/s
  
    Profile digital filter
       Filtered Profile:            RC
       Filtered Profile:            PC-RC
       Filtered Profile:            Gauss
       Non-Filtered Profile:   D-P

    Resolution :     
    Evaluation length : 5 cut-off
    Power Li-ion battery: rechargeable
    Operating conditions:  Temp. 0~50℃
       Humidity <80%
    Size：140x57x48 mm  (5.5x2.2x1.9 inch)    
    Weight: about 420 g