... Rz, Rq, Rt 2)Highly sophisticated inductance sensor Surface Roughness Tester:1)Multiple parameter measurement: Ra, Rz, Rq, Rt2)Highly sophisticated ... D-P* Built-in lithium ion rechargeable battery and control circuit with high capacity* Small in size, light in weight and ... off about 5 minutes after the last key operation.*The tester can memorize 7 groups of measurement results and measuring conditions ...