Insulation testers

Reliable insulation testing for safety, maintenance, and PV systems

HIOKI insulation testers are designed for accurate and reliable insulation resistance measurement in electrical installations, equipment testing, and preventive maintenance. From high-voltage applications to fast, routine checks in the field, the lineup covers a wide range of test voltages, safety features, and application-specific functions.

The IR5051 High Voltage Insulation Tester and IR4053-10 both support PV insulation testing under live conditions – making them ideal for solar installations in operation. For general-purpose testing and digital workflows, the IR4057-50 adds Bluetooth® connectivity for efficient data transfer in a compact format. The IR5050 enables flexible high-voltage testing up to 5 kV for industrial assets and larger systems. All models are CAT III or CAT IV rated depending on the application, ensuring compliance with safety standards and reliable performance in the field.

Choose the right insulation tester that fits your application.