The SG4008、SG4012 is the effective solution for routine pass/fail partial discharge testing、SG4012 simply measures the level of PD and the applied test voltage. It’s designed to help you modernize your testing facility at an affordable price and, it’s simple to operate.. It has the basic functi*** of an analog detector and meets all IEC and IEEE/ANSI standa*** for partial discharge testing. It’s a straightforward replacement for older analog detectors of any make or model. The SG4008