HT Instruments HT97U AC Transducers Current Clamp Meter up to 1000A Rigid clamp 10-100-1000A AC, diameter 54mm AC current measurement with 10-100-1000A ranges. Range selector included. Maximum output signal: 1VAC. Output connector type Hypertac. Standards EMC 2004/108/CE Directive CE MARK LVD 2006/95/CE Directive Ranges selector 10-100-1000A.