HT Instruments I-V400W:

A versatile and user-friendly insulation tester with advanced features for electrical safety testing. Its key features include:

Wide measurement range (0.01 MΩ to 100 GΩ)
High test voltage (up to 1000 V)
Polarization Index (PI) and Dielectric Absorption Ratio (DAR) measurements
Automatic discharge function for enhanced safety
* Compact and lightweight design for easy portability