Greibach Model 500 D.C Milliamperes Meter Resistance .155 to 5,312 Ω, Accuracy 1/4%
This high accuracy analog meter uses an internal mirror to project a simulated needle on to the meter scale.
Thirteen selectable ranges provide a measurement range from 1 microamp (full scale) to 1 amp. Resolution on the lowest scale is 0.001 microamp.
An easily replaceable lamp provides the light used to create the simulated needle.
To activate the lamp a 6 volt battery or power supply has to be connected to the connector on top of the meter.
EXTERNAL POWER SUPPLY, AND MATCHING CONNECTOR IS NOT INCLUDED.