Extech MG310 Compact Digital Insulation Tester (250/500/1000V)
What is the Extech MG310 Compact Digital Insulation Tester?
The Extech MG310 Compact Digital Insulation Tester is a portable insulation resistance tester designed for UK electricians and maintenance technicians who need fast, reliable testing on motors, transducers and industrial electrical equipment. It supports 250 V, 500 V and 1000 V test voltages and measures insulation resistance up to 5.5 GΩ, making it suitable for commissioning, routine inspection and troubleshooting.
Its compact design, snap-on protective cover and clear dual display make the MG310 easy to use on site or in plant rooms. Additional safety features such as auto-discharge, voltage output warnings and overload indication help electricians work confidently when testing live or recently energised systems.
How does the Extech MG310 support everyday insulation testing?
The MG310 combines insulation resistance testing with low-resistance measurement and continuity, reducing the need to carry multiple instruments. Functions such as PI and DAR measurements help assess insulation condition over time, while the backlit display and audible continuity beeper improve usability in low-light or noisy environments.
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.
