Feature: 1. Standard Certified: This surface resistivity tester is designed according to ANSI ESD S20.20, IEC61340 5 1, JESD 625 B, CECC, ASTM and UL tester procedures, which is in line with anti static standards. 2. Main Purpose: The tester is mainly used to measure the resistivity and grounding resistance of conductive, antistatic and static dissipative materials. 3. Self Calibration: The meter uses the ASTM standard D 257 parallel grid induction method, self span calibration with high speed OP AMP. 4. Easy Operation: This tester is easy to use, one key to start measurement, with high accuracy and strong reliability. 5. Wide Applications: This tester can be used for engineering, maintenance, quality control, incoming inspection, manufacturing and training. Specification: Item Type: Surface Resistance Tester Material: ABS Battery: 1 x 6F22 9V battery, 800mAh capacity (shipped with matching battery) Continuous Working Time: More than 40 hours Measuring Temperature Range: 40°F to 120°F (5°C to 49°C) Measurement Humidity Range: 5% to 90%RH (more than 65%RH will affect the measurement accuracy of the instrument). Package List: 1 x Surface Resistance Tester1 x Ground Wire1 x Battery1 x Manual