UNI-T UT51 isolatietester multimeter

The UNI-T UT51 is a versatile insulation tester and digital multimeter designed for measuring insulation resistance up to 10GΩ at test voltages of 100V, 250V, 500V, and 1000V. It also measures AC/DC voltage and resistance, with a continuity buzzer for quick checks. Ideal for electrical maintenance, motor testing, and cable insulation verification.

Advantages

Combines insulation testing and multimeter functions in one device. High insulation resistance range up to 10GΩ. Multiple test voltages for different applications. Continuity buzzer for fast troubleshooting. Data hold and backlight for convenient readings. Auto power off saves battery life. CAT III 600V safety rating.

Suitable for

• Electrical maintenance and troubleshooting
• Testing insulation of motors, transformers, and cables
• Verifying wiring and continuity in installations
• HVAC and industrial equipment servicing
• Field service and on-site diagnostics

Key specifications

• Insulation test voltages: 100V, 250V, 500V, 1000V
• Insulation resistance range: 0.1MΩ to 10GΩ (depending on voltage)
• AC voltage: 30V to 600V (50/60Hz)
• DC voltage: 30V to 1000V
• Resistance: 0.1Ω to 20kΩ
• Continuity buzzer: Yes (<30Ω)
• Display: 2000 counts, LCD with backlight
• Data hold: Yes
• Auto power off: Yes
• Power: 6 x 1.5V AA batteries
• Safety: CAT III 600V / CAT II 1000V

Recommendations

For reliable insulation testing and general electrical measurements, the UNI-T UT51 is a solid choice for professionals and serious DIYers. Its combination of features and safety ratings makes it suitable for a wide range of tasks.