The IR4018-20 is an insulation analyzer developed by Hioki. It specially based on dependable and effective analog insulation testing. The unit comes with 500 V single range testing voltage, 1000 MΩ maximum insulation meter, and bright LED luminous scale. It is also engineered with hard case body with rapid and simple storing without disconnecting the leads. In addition, the framework is constructed with harsh design to withstand a 1 m drop on a concrete floors.