Insulation Resistance Tester, Ohm Meter, 100V/250V/500V/1000V Voltmeter 0 to 5G ohm Meter Megohmmeter, Ground Resistance Tester 2000 Counts LCD Display with Backlight (UT501A): Amazon.com: Industrial & Scientific
MUL-351 Digital Insulation Tester Resistance Meter 250V / 500V / 1000V – Gain Express
SEW 8010 IN Digital Insulation Resistance Meter - up to 1000V output
Akozon Earth Resistance Tester PM5203 Digital Insulation Resistance Tester Megohmmeter AC DC Voltage Tester Analog Display 50-1000V Meter Automatic Calculation: Amazon.com: Industrial & Scientific
BTMETER BT-6688B Megohmmeter 200 Gig Ohm Digital Insulation Resistance Tester, 500V/1kV/2.5kV/5kV Test Voltage, Auto Ranging, Backlight Display: Amazon.com: Industrial & Scientific
Fluke 1503 Insulation Resistance Meter
UNIT Digital Megger Insulation Resistance Tester Ohmmeter Megometer 1KV 5GΩ-20GΩ | eBay