Overview

The UNI-T UT505B is a professional-grade, handheld insulation resistance tester designed for electricians and HVAC technicians who require precision and safety in the field. This versatile instrument functions as both a high-voltage insulation tester and a True RMS digital multimeter, making it a comprehensive solution for troubleshooting motors, cables, and complex electrical systems.

Engineered for durability and ease of use, the UT505B features a large 6000-count backlit display with an analogue bar graph for real-time visual feedback. With its wide testing range of 50V to 1000V and the ability to measure resistance up to 200GΩ, it provides the detailed data necessary for compliance and preventative maintenance on heavy-duty equipment.

Why It Matters

In the demanding Australian electrical and HVAC sectors, reliable diagnostics are critical for preventing equipment failure and ensuring site safety. The UT505B includes essential diagnostic functions like Polarization Index (PI) and Dielectric Absorption Ratio (DAR), allowing professionals to assess insulation health over time rather than relying on a single snapshot. This leads to more accurate long-term assessments and reduced downtime.

What's Included

• ✓ 1 x UT505B Insulation Resistance Tester
• ✓ 6 x AA Batteries (1.5V)
• ✓ 1 x Set of High-Quality Test Leads and Probes
• ✓ 1 x Set of Heavy-Duty Alligator Clips
• ✓ 1 x Remote Test Probe
• ✓ 1 x Soft Protective Carry Bag
• ✓ 1 x User Manual

Features & Benefits

• Wide Voltage Range: Selectable test voltages from 50V to 1000V to suit various industrial applications.
• Advanced Diagnostics: Built-in PI and DAR functions for comprehensive insulation health monitoring.
• Step Voltage Testing: Allows for stress testing insulation between 50% to 120% of the rated voltage.
• Remote Operation: Included remote probe enables one-handed testing in confined spaces or complex panels.
• Enhanced Safety: Auto-discharge feature ensures no residual voltage remains on the circuit after testing, paired with live wire and high voltage alerts.
• Data Management: Store up to 99 groups of data for easy site reporting and historical comparison.
• True RMS: Provides accurate readings on non-linear AC voltage signals for better multimeter performance.

Applications

• Industrial motor and transformer insulation testing.
• HVAC compressor and system maintenance.
• Cable insulation integrity checks for commercial installations.
• Predictive maintenance for power distribution boards.

Tradie Pro Tip: Use the remote probe feature when working in cramped switchboards. It allows you to trigger the test with one hand while holding your ground lead steady with the other, significantly improving safety and efficiency on busy sites.

Pair With

• UNI-T Clamp Meters
• HVAC Shop Electrical Safety Gear
• Replacement Heavy-Duty Test Lead Sets

Keep Your Space Clean / CTA

Equip yourself with a tool that works as hard as you do. Ensure your insulation testing is accurate, safe, and efficient with the UNI-T UT505B. Order yours from HVAC Shop today for reliable performance on every job site.