What is the Metrel MI-3121H High Voltage Insulation Tester?
The Metrel MI-3121H is a 2.5 kV high-voltage insulation and continuity tester designed for UK electricians, commissioning engineers and maintenance technicians who need reliable insulation testing on motors, switchgear, cables and industrial installations. It provides fast, stable readings with selectable test voltages and is ideal for diagnosing insulation breakdown, ageing cables or moisture-related faults across commercial and industrial sites.
How does the MI-3121H help in everyday testing?
Electricians benefit from simple one-hand operation, clear measurement feedback and automatic discharge after testing. The instrument is built for regular use on site and provides dependable results when checking the insulation integrity of high-voltage systems.
Order today to enjoy free delivery, expert support and our 90-day satisfaction guarantee. Need advice? Our team is here to assist you.
Why choose Instrotech for your electrical test equipment?
With over 40 years’ experience supporting UK electricians, technicians and engineers, Instrotech is your trusted partner for quality tools and expert service. When you purchase from us, you benefit from:
Free UK shipping on all orders
Access to our knowledgeable technical support team
Available calibration services to maintain safety compliance
A 90-day money-back guarantee for complete peace of mind
We’re committed to helping you work safely and efficiently with industry-leading products and ongoing support.
