Megger MIT485 Insulation Tester, 50V Min, 500V Max, 200GΩ Max, CAT IV

Keep tabs on the electrical resistance of your communication equipment and cables with this insulation tester from Megger. It assesses how much your appliances oppose the current flow, ensuring they're safe to use in volatile settings. The unit features an innovative three-terminal measurement feature that lets you plug in your tip, ring and ground test leads simultaneously, saving time and hassle. With a testing capacity between 10 and 100GΩ, this multitasker is handy for domestic, commercial and industrial use.

• Dual digital display shows you the main results and supplementary data (such as frequency) simultaneously
• Powered by six AA batteries that provide energy for up to 3000 measurements at 500V, assuring you of long-term performance
• Rubber over-moulding and ABS housing to withstand rough handling
• IP54 rating indicates that it's protected against limited amounts of dust and light water sprays

• Power generation plants
• Charge amplifiers
• Transformers and switchgear

Yes, its built-in buzzer goes off when the insulation limit goes above a preset threshold. You can turn the alarm off or on using a simple push button.