vtg Burlington Model 331 panel meter Microamperes 50amp Guage USA

  vintage Burlington Instrument Company Model 331 panel meter designed to measure D.C. microamperes with a full-scale range of 50 µA.Manufacturer: Burlington Instrument Company, based in Burlington, Iowa.Specifications: This model 331 has a full-scale deflection (F.S.) of 50 microamperes.Usage: It is an analog gauge typically used to measure low levels of direct current in industrial or test equipment circuits