Watthour Meter, Model J0405, is the inductive instrument;it is suitable for middle schools and polytechnic schools to measure electric-energy in the single-phase AC circuit in the teaching experiment.

• J0405型电能表是供课堂教学实验使用的感应系单相电能表，适用于中学、中专等实验室测量交流电路中的电能。