Metrel's ISOTest is a portable analogue insulation tester that can be used to test insulation of electrical appliances and instruments, HV cables, HV transformers, electrical traction systems, motors and other applications.
Since it comes housed in its own protective carrying case with a built-in handle, the ISOTEST is an ideal product for use in the field as it is easy to move between applications (particularly useful for fixed equipment that simply can't be brought to the tester).
This tester also boasts an extremely high measurement range and can be used to test insulation resistance up to a 500 Terra Ohms (as well as voltage from 0 to 600V AC/DC. It also features multiple test voltages: 250V, 500V, 1000V, 2500V and 5000V. The ISOTEST is battery powered and lasts for around 2500 tests per set of batteries.