Extech Instruments 380320 Analogue Insulation Tester

Amazon

Large easy to read analogue display Three test voltages 250V, 500V, and 1000V Insulation Resistance to 400MOhm Lock Power On feature for extended test times Automatic discharge circuit, Weight: 1.212542441 Pounds, Manufacturer: Extech

Test-meter.co.uk

Extech 380320 Analogue Insulation Tester. Measures insulation resistance up to 400MΩ. Three test voltages (250V, 500V, 1000V). Continuity to 3Ω, AC voltage to 600V. Includes test leads, batteries, and rugged carry case.

Radwell UK

ANALOG DISPLAY, 400 MEGOHM ELECTRICAL INSULATION RESISTANCE TESTER & MEGOHMMETER