UNI-T UT501B Insulation Tester with PI & DAR – 1000V, 5GΩ

The UNI-T UT501B is an upgraded 1000V insulation resistance tester. While it shares the physical form factor of the UT501A, it adds advanced analytical functions: automatic Polarization Index (PI) and Dielectric Absorption Ratio (DAR) calculations. Measuring up to 5GΩ, it allows technicians to determine the long-term health and moisture content of motor and transformer insulation automatically.

Move beyond simple resistance checks with the UNI-T UT501B Insulation Tester. When auditing aging factory motors or newly rewound industrial transformers in Pakistan, a single resistance reading doesn't tell the whole story. You need to know if moisture has penetrated the windings over time. The UT501B solves this by introducing Polarization Index (PI) and Dielectric Absorption Ratio (DAR) testing to a compact, affordable meter.

With a single button press, the meter runs a timed 10-minute (PI) or 1-minute (DAR) test, automatically calculating the health ratio of the insulation. This prevents catastrophic motor failures by catching degradation long before a short circuit occurs. Capable of outputting 1000V and measuring up to 5GΩ, it also features a unique low-resistance zeroing function, ensuring that the resistance of your test leads doesn't interfere with your final diagnostic readings.

• Discover predictive maintenance tools in [Electrical & Electronics].
• View analytical testing gear under [Insulation & Earth Testers].
• Compare PI/DAR capable models in our [Insulation Testers] category.

Key Features:

• Automatic PI & DAR: Instantly calculates the moisture content and aging status of heavy electrical insulation.
• Low Resistance Zeroing: Calibrates out the resistance of the test cables for vastly improved accuracy on low-ohm continuity tests.
• Continuous Measurement Mode: Features a lock-on test button with red warning lights and a buzzer for prolonged diagnostics.
• 1000V / 5GΩ Output: Provides the necessary voltage to stress-test standard 3-phase commercial equipment.

Frequently Asked Questions (FAQs):

Q: What is the price of the UNI-T UT501B in Pakistan?

A: Check Kamadi.pk for B2B pricing. We guarantee authentic UNI-T instruments with fast dispatch.

Q: UT501A vs UT501B: Which one should I buy?

A: If you are a general electrician doing basic wiring checks, the UT501A is sufficient. If you work with industrial motors, pumps, or HVAC compressors, the UT501B is mandatory due to its PI/DAR calculation features.

Q: Does it have a backlight?

A: Yes, the 2000-count LCD features a bright backlight for working in dark electrical panels.