... quality,reasonable price,hot sale panel meter and ammeter,electronic instrument,ampere meter The scope of applicationThe series product is ... switch plate of various control system and distribution system to indicate relative parameter,such as AC,DC,Voltage, ... to 120times per minute,and two hours tansport jolt;Operating positon:vertical directionFrequency:50Hz, 60Hz1. Accuracy class:2.52. Specification: ...