UNI-T Digital Insulation Resistance tester


UT500 series insulation testers are used to measure the insulation resistance of electrical equipment. This is done by measuring the insulation resistance between electrical circuits or between circuits and ground. UT500 series can measure insulation resistance, AC voltage, low resistance, PI (Polarization Index) and DAR (Dielectric Absorption Ratio). These are ideal tools for ensuring transformers, generators, high voltage motors, power capacitors, power cables, arresters and other electrical equipment that can operate in a safe and accurate manner.


1. 2000 count LCD display, overload indication, backlight
2. AC voltage measurement, auto power off
3. Auto discharge
4. Continuous measurements mode, red warning light and buzzer function

Specifications Range Best Accuracy
Model UT501A
Insulation Resistance (Ω) Test Voltage 100V/250V/500V/1000V 0%~10%
100V 0.00MΩ~100MΩ ±(3%+5)
250V 0.00MΩ~99.9MΩ ±(3%+5)
100MΩ~5.0GΩ ±(5%+5)
500V 0.00MΩ~99.9MΩ ±(3%+5)
100MΩ~5.0GΩ ±(5%+5)
1000V 0.00MΩ~99.9MΩ ±(3%+5)
100MΩ~5.0GΩ ±(5%+5)
Load Current 50V (R=50kΩ) 1mA 0%~10%
100V (R=100kΩ) 1mA 0%~10%
250V (R=250kΩ) 1mA 0%~10%
500V (R=500kΩ) 1mA 0%~10%
1000V (R=1MΩ) 1mA 0%~10%
Short Circuit Current <2mA
AC Voltage (V) 30V~750V ±(2%+3)
Display Count 2000
Auto Range
Low Battery Indication
LCD Backlight
Alarm Light Display
Alarm Buzzer
HighVoltage Indication
Over Load Indication
Auto Disharge
Test Voltage Vice Display
10MΩ Internal Resistance Test
General Characteristics
Power 1.5V Batteries (LR6) × 6   (battery do not included)
LCD Size 70.6mm x 34mm
Product Color Red and Grey
Product Net Weight 500g
Product Size 150mm x 100mm x 71mm
Standard Accessories Probe, Alligator Clip, Test Lead, Gallus


Commodity Code: 90303399

1 in stock (can be backordered)