When it comes to testing insulation resistance on-site, you need a tool that delivers reliable readings every time. The Uni-T UT502A Insulation Resistance Tester is purpose-built for Australian tradies, electricians, HVAC technicians, and maintenance teams who work on transformers, motors, cables, and high-voltage systems. Whether you’re commissioning new equipment, diagnosing faults, or carrying out preventative maintenance, this tester helps ensure safety, compliance, and long service life for your electrical assets.
Engineered for both industrial and commercial use, the UT502A is perfect for testing insulation between electrical circuits or between a circuit and ground. With its high-voltage capability up to 2500V and precise PI (Polarisation Index) and DAR (Dielectric Absorption Ratio) functions, it’s the go-to tool for professionals who need trustworthy data under real-world conditions.
Specifications
- Material: Durable red and grey ABS housing
- Dimensions: 150mm x 100mm x 71mm
- Weight: 500g
- Measurement Range: Insulation resistance up to 20GΩ at 2500V
- Test Voltages: 500V / 1000V / 2500V
- Display: Large 2000-count LCD with backlight
- Power: 1.5V LR6 batteries x 6
- Compliance: Meets IEC 61557 standards
Features & Benefits
Accuracy & Safety
- Measures insulation resistance, AC voltage, low resistance, PI, and DAR
- High-voltage indication, overload protection, and auto discharge for safety
- Continuous low-resistance measurement with zero-return function for improved accuracy
- Red warning light and buzzer alarm for clear hazard alerts
Durability & Worksite Readiness
- Built tough to handle Australian job site conditions
- Shock-resistant ABS housing protects internal components
- Withstands heat, humidity, and dust common in industrial environments
- Supplied in a protective carry case for safe transport and storage
Ease of Use & Efficiency
- Clear, backlit LCD display for easy reading in low-light areas
- Automatic measurement mode reduces setup time
- Test voltage secondary display for quick confirmation
- Lightweight design makes it easy to carry up ladders or across large job sites
Included in the Box
- 1 x Uni-T UT502A Insulation Resistance Tester
- 1 x Set of test leads
- 1 x Set of alligator clips
- 1 x Carry case
- 1 x Gallus strap
- 1 x Temperature probe
- 1 x English user manual
- 6 x LR6 1.5V batteries
- 12-month warranty
Works Best With
Pair the Uni-T UT502A Insulation Resistance Tester with these essential tools and accessories to create a complete electrical testing kit for HVAC and industrial work:
- Uni-T Digital Multimeter – Cross-check voltages, continuity, and resistance with fast, accurate readings.
For more options, explore our full Electrical Testing Tools collection to find the right instruments for every job.