







The UNI-T UT501E is a professional fast insulation resistance tester designed for electricians, maintenance engineers, and industrial applications. It measures insulation resistance up to 4GΩ with five selectable test voltages (100V, 125V, 250V, 500V, and 1000V). Featuring 2.5× faster testing, PI & DAR analysis, data storage, remote testing, PC software support, and IP54 protection, the UT501E is an ideal solution for testing motors, transformers, cables, switchgear, and electrical installations.
| Specification | Details |
|---|---|
| Brand | UNI-T |
| Model | UT501E |
| Product Type | Fast Digital Insulation Resistance Tester |
| Insulation Resistance Range | 0.01MΩ – 4000MΩ (4GΩ) |
| Selectable Test Voltages | 100V / 125V / 250V / 500V / 1000V |
| Low Resistance Measurement | 0.00Ω – 400Ω |
| AC Voltage Measurement | 30V – 600V |
| DC Voltage Measurement | 30V – 600V |
| Rated Test Current | 1.0mA |
| Short Circuit Current | <2.0mA |
| Fast Measurement | 2.5× Faster |
| PI Test | Yes |
| DAR Test | Yes |
| Comparison Function | Yes |
| Auto Discharge | Yes |
| High Voltage Alarm | Audible & Visual |
| Manual Range | Insulation Measurement |
| Auto Range | Voltage Measurement |
| Data Storage | 99 Groups |
| PC Software | Supported (USB Connection) |
| Remote Testing | Supported |
| Security Lock | Yes |
| Analog Bar Graph | Yes |
| Backlight | Yes |
| Auto Power Off | Yes |
| Low Battery Indicator | Yes |
| Protection Rating | IP54 |
| Safety Category | CAT III 600V |
| Power Supply | 11.1V 2600mAh Rechargeable Lithium Battery |
| Dimensions (L × W × H) | 161 × 116 × 68 mm |
| Product Color | Black & Red |
| Battery Included | Yes |
| Origin | Mainland China |








The UNI-T UT502A is a professional digital insulation resistance tester (Megohmmeter) designed for high-voltage insulation testing up to 2500V. It measures insulation resistance up to 20GΩ and features PI & DAR testing, low resistance measurement, AC voltage testing, automatic discharge, LCD backlight, audible alarms, and overload protection. It is an ideal instrument for electricians, industrial maintenance engineers, power distribution systems, cable testing, transformer maintenance, and motor insulation inspection.
| Specification | Details |
|---|---|
| Brand | UNI-T |
| Model | UT502A |
| Product Type | Digital Insulation Resistance Tester (Megohmmeter) |
| Display | Digital LCD (2000 Counts) |
| Insulation Resistance Range | 0MΩ – 20GΩ |
| Selectable Test Voltages | 500V / 1000V / 2500V |
| Low Resistance Range | 0.01Ω – 200Ω |
| AC Voltage Measurement | 30V – 600V |
| Rated Test Current | 1mA |
| Short Circuit Current | <2mA |
| Accuracy Class | 3% |
| DAR Function | Yes (60s/15s & 60s/30s) |
| PI Function | Yes |
| Auto Range | Yes |
| Auto Discharge | Yes |
| LCD Backlight | Yes |
| Light Alarm | Yes |
| Buzzer Alarm | Yes |
| High Voltage Indicator | Yes |
| Overload Protection | Yes |
| Low Battery Indicator | Yes |
| Test Voltage Secondary Display | Yes |
| 10MΩ Internal Resistance Test | Yes |
| Operating Temperature | 0°C – 50°C |
| Power Supply | 6 × 1.5V AA (LR6) Batteries |
| Display Size | 70.6 × 34 mm |
| Dimensions (L × W × H) | 150 × 100 × 71 mm |
| Weight | Approx. 500 g |
| Product Color | Red & Grey |
| Certifications | CE, FCC, RoHS, IEC 61557 |
| Origin | Mainland China |






The UNI-T UT503PV is a professional photovoltaic (PV) insulation resistance tester designed for testing solar power systems, electrical installations, cables, motors, and industrial equipment. It offers live PV insulation testing, insulation resistance measurement up to 4000MΩ, and voltage measurement up to 1000V DC / 600V AC. With Bluetooth connectivity, USB data transfer, 1000-record memory, stepping voltage testing, compare function, and automatic discharge protection, the UT503PV is an ideal instrument for solar installers, maintenance engineers, and electrical professionals.
| Specification | Details |
|---|---|
| Brand | UNI-T |
| Model | UT503PV |
| Product Type | PV Insulation Resistance Tester |
| Insulation Resistance Range | 1.51MΩ – 4000MΩ |
| PV Insulation Test | Supported (Live PV Testing) |
| Output Test Voltage | 1000V DC |
| DC Voltage Measurement | Up to 1000V DC |
| AC Voltage Measurement | Up to 600V AC |
| Stepping Voltage Function | Yes |
| Continuous Measurement | Yes |
| Time Measurement | Yes |
| Compare Function | Yes (IR Comparison) |
| Auto Discharge | Yes |
| High Voltage Alarm | Yes |
| Data Storage | 1000 Measurement Records |
| Communication | Bluetooth App + USB Cable |
| Display | Digital LCD with Auto/Manual Backlight |
| Backlight | Auto / Manual |
| Certification | CE |
| Application | PV & Electrical Insulation Testing |
| Origin | Mainland China |
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The UNI-T UT681HDMI is a professional HDMI cable tester designed for quickly verifying the continuity and wiring integrity of HDMI and Mini HDMI cables. It supports HDMI 1.2, 1.3, 1.4, and 2.0 standards, making it an ideal tool for AV installers, technicians, electricians, and maintenance professionals. Equipped with 20 LED status indicators, the tester provides fast and accurate diagnostics for HDMI cable installations and repairs.
The UT681HDMI can scan all 19 internal wires of an HDMI cable to identify open circuits, short circuits, crossed wires, and incorrect wiring sequences. It offers both Fast Scan Mode and Full Display Mode, enabling users to quickly detect faults or perform detailed cable verification. The tester supports HDMI Type-A and Mini HDMI Type-C connectors, making it suitable for testing a wide range of HDMI cable configurations.
Powered by a standard 9V battery, the UT681HDMI features a low battery warning indicator that alerts users when battery voltage drops below approximately 7.2V. It also includes an automatic power-off function after 10 minutes of inactivity, helping conserve battery life. Its lightweight and portable design makes it perfect for installation, maintenance, troubleshooting, and repair work.
| Feature | Details |
|---|---|
| Brand | UNI-T |
| Model | UT681HDMI |
| Product Type | HDMI / Mini HDMI Cable Tester |
| Supported HDMI Versions | HDMI 1.2 / 1.3 / 1.4 / 2.0 |
| Supported Connectors | HDMI Type-A, Mini HDMI Type-C |
| Scan Test Mode | 20 LED Sequential Scan |
| Full Display Mode | 20 LED Full Display |
| Continuity Test | Yes |
| Short Circuit Test | Yes |
| Crossover Test | Yes |
| Network Cable Test | Shielded / Unshielded |
| Power Supply | 9V Battery |
| Battery Included | No |
| Low Voltage Test | Yes |
| Auto Power-Off | After 10 Minutes |
| Operating Temperature | 0°C ~ 40°C |
| Storage Temperature | -10°C ~ 50°C |
| Operating Humidity | 20% ~ 80% RH |
| Storage Humidity | 10% ~ 90% RH |
| Maximum Altitude | Less than 2000 m |
| Weight | Approx. 175 g |
| Origin | Mainland China |
Approx.: 175 g
Approx.: 125 × 55 × 30 mm
The UNI-T UT681HDMI is a reliable and easy-to-use HDMI cable tester designed for professionals who require fast and accurate cable diagnostics. With support for multiple HDMI standards, intelligent wire scanning, 20 LED status indicators, and portable operation, it is an essential tool for HDMI cable installation, maintenance, and troubleshooting.







