Amprobe AMB-1A Megohmmeter is a battery-powered instrument designed to measure insulation resistance. It has a range of 0-100 Megohms, a test voltage of 500 VDC, and an open circuit voltage of 300mV. The AMB-1A also has a 0-600 VAC test band, which can be used to test for AC or DC voltage.

The AMB-1A is a versatile instrument that can be used to test a variety of electrical equipment, including motors, generators, transformers, and cables. It is also ideal for testing insulation resistance in hazardous environments, as it is intrinsically safe and does not require a ground connection. Other capabilities include: