UT501B 1000V Insulation Resistance Tester DAR PI Functions

UT501B 250-1000V Insulation Resistance Tester with DAR PI Functions by Uni-T

$189.99 + GST

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UNI-T UT501B 1000V Insulation Resistance Meter Ground Tester MegOhmmeter Volt Meter with DAR PI Functions


UT500 series insulation testers are used to measure the insulation resistance of electrical  equipment and household appliances. 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). 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.

UT501B 1000V Insulation Resistance Tester Review:

An excellent insulation resistance tester used for insulation resistance measurement for insulation materials and various kinds of electric equipment such as transformer, electric machines, cables, switches, electrical appliance, a ideal tool for electric maintenance, testing and inspection.

UT501B 1000V Insulation Resistance Tester Features:

PI and DAR measurement, auto resistivity calculation
2000 count LCD display
Overload indication
LCD Backlight
AC voltage measurement
Alarm Light Display
Alarm Buzzer
High Voltage Indication
Auto power off
Auto discharge
Continuous measurements mode, red warning light and buzzer function
Test Voltage Vice Display
Automatic measurement
Low Battery Indication
10MΩ internal resistance test
Auto Discharge


In the box:

Standard Individual Packing :
1 x UT501B, 1 x English user manual, 1 x Batteries 1 x Test Leads,  1 x carry case, 1 x set alligator clips, 1 x gallus

Delivery and Returns:

Delivery is by courier from Auckland, delivery times may vary. All Auckland orders are delivered the next business day, other main business centres and standard areas are within two – three business days from payment.
All rural areas are subject to normal rural delivery times.
For more details on delivery please feel free to contact us before ordering. Please contact us for Return Authorisation before returning.

Satisfaction Guarantee:

If you are not completely satisfied with your purchase, simply contact us to return it within 30 days in the original packaging and condition supplied for a full refund.

Warranty Information:

Unless specified all products carry a minimum 12-month manufacturer’s return to base warranty. HVACTOOLS will provide full support for this warranty. All products that are found to be faulty within 30 days of purchase will be replaced with brand new products.

UT501B 1000V Insulation Resistance Tester Specifications:

Insulation resistance (Ω)Test voltages100V/250V/500V/1000V0%~10%
Load current50V (R=50kΩ) 1mA0%~10%0%~10%0%~10%
100V (R=100kΩ) 1mA0%~10%0%~10%0%~10%
250V (R=250kΩ) 1mA0%~10%0%~10%0%~10%
500V (R=500kΩ) 1mA0%~10%0%~10%0%~10%
1000V (R=1MΩ) 1mA0%~10%0%~10%0%~10%
2500V (R=1MΩ) 1mA0%~10%
Short-circuit current<2mA<2mA<2mA
Low resistance (Ω)0.01Ω~200Ω (about 5.0V/>200mA)±(2%+3)±(2%+3)
AC voltage (V)30V~750V±(2%+3)
Display count200020002000
DAR60s/15s and 60s/30s
Auto range/Low battery indication
LCD backlight/Light alarm
Buzzer alarm/High voltage indication
Over load indication/Auto discharge
Test voltage secondary display
10MΩ internal resistance test
Meets IEC 6155761557-1:2007; 61557-2:2007; 61557-4:2007 (UT502A only)
General Characterisitics
Power1.5V battery (LR6) x 6
Display70.6mm x 34mm
Product colorRed and grey
Product net weight500g
Product size150mm x 100mm x 71mm
Standard accessories