Portable Digital Surface roughness Teste [ Portable Digital Surface roughness Tester, similar to Mitutoyo model no. SJ- 210 or similar, as per technical specification: Measurement Range ( X- axis ): 17. 5 mm, Measured profile: Roughness, Evaluation parameter Ra, Rz, Rq, Rt, Rv., Measuring range: Z- axis detector: 360 micron (- 200 micron to + 160 microns ), Measuring speed: 025 mm/ sec, 0. 5 mm/ sec, 0. 75mm/ sec., Measuring speed ( returning ): 1 mm/ s, Measuring force: 4mN ( 0. 75mN ), Power supply: Two- way power supply: battery ( rechargeable Ni- MH battery ) and AC adapter, Display: Digital, Weight: max 500gm with Display unit + drive unit + standard detector. Supply along Along with a Calibration Certificate from NABL/ Govt. approved laboratory. Warranty period of item should be minimum one year from the date of supply. ]