Ross Engineering series of high voltage megohm meters

 Ross Engineering Corporation's High Voltage Megmeter? Series is a unique battery powered DC high voltage tester and instrument. Models can be used for edge tolerance testing up to 50kV DC, as well as for measuring leakage currents as low as 0.001 microamperes and resistances up to 30 megaohms in testing underground cables, rubber safety gloves, vacuum circuit breakers, high-voltage equipment, and all types. All models feature overcurrent tripping to minimize arc damage. Fully portable and equipped with rechargeable 12V battery, it can be recharged from the car or 115V and 230V AC.