UT251+ 60A Leakage Current Clamp Meter

UNI-T UT251C+ Leakage Current Clamp Meter

High-Sensitivity Measurement with Superior Anti-Interference Design

The UNI-T UT251C+ is a high-accuracy true RMS leakage current clamp meter with exceptional measurement sensitivity down to 1µA resolution. Engineered specifically for testing AC leakage current in electrical systems, its large 40mm jaw opening and strong anti-interference capabilities ensure reliable performance even in electrically noisy environments. With advanced features like harmonic measurement, Bluetooth connectivity, and LPF filtering technology, this professional-grade meter delivers the precision and reliability needed by maintenance technicians, electrical safety inspectors, and field service personnel in commercial buildings, industrial facilities, data centers, and residential applications.

Key Features

• High-Sensitivity Measurement: Captures leakage currents as low as 1µA with exceptional precision
• 3000-Count Display Resolution: Clear dual display for simultaneous measurement readings
• Large 40mm Jaw Opening: Accommodates multiple cables or larger conductors for convenient testing
• True RMS Measurement: Accurate readings regardless of waveform distortion
• Advanced LPF Filtering: Effectively eliminates high-frequency interference for stable readings
• Harmonic Analysis: Identifies and quantifies harmonic components up to the 20th order
• Bluetooth Connectivity: Pairs with UNI-T Smart Measure APP for data logging and analysis
• Strong Anti-Interference Design: Maintains stability in electrically noisy environments
• Portable Compact Design: Lightweight 350g construction for comfortable extended use
• CAT III 600V Safety Rating: Professional-level protection for operator safety

Precision Leakage Detection for Safety Compliance

The UNI-T UT251C+ delivers exceptional measurement accuracy with its high-resolution design, providing the precision needed for detailed leakage current diagnostics. With current measurement accuracy of ±(1%+5) for 45Hz~60Hz frequency range and resolution down to 1µA, it offers the sensitivity required for detecting even the smallest leakage currents. The True RMS measurement capabilities ensure accurate readings regardless of waveform distortion, while the specialized LPF (Low Pass Filter) function eliminates high-frequency interference for stable and reliable measurements.

The advanced harmonic analysis capability identifies and quantifies harmonic components up to the 20th order, allowing technicians to evaluate power quality issues and troubleshoot complex electrical problems. This feature is particularly valuable when diagnosing equipment malfunctions caused by harmonic distortion or when verifying compliance with power quality standards.

Comprehensive Measurement Capabilities

The UT251C+ combines essential leakage current measurements with specialized functions to deliver complete diagnostic capabilities:

• AC current measurement from 3mA to 60A with high resolution
• Frequency measurement from 99.99Hz to 5.000kHz with ±(0.1%+5) accuracy
• Harmonic analysis of current waveforms up to the 20th order
• Maximum/minimum value recording for monitoring variations
• Data hold function for convenient reading capture
• Auto-ranging for simple operation and accurate measurements
• Bright backlit display for visibility in all working conditions
• Built-in flashlight for illuminating dark work areas

These comprehensive measurement capabilities make the UT251C+ the ideal tool for professionals who need reliable leakage current detection and analysis in a single instrument.

Smart Connectivity and Data Logging

The integrated Bluetooth connectivity pairs with the UNI-T Smart Measure mobile application (available for both iOS and Android), allowing technicians to:

• Record measurement data remotely for trend analysis
• Generate real-time measurement charts
• Create professional testing reports
• Export data in multiple formats
• Document system performance over time

This connectivity transforms the UT251C+ from a simple measurement tool into a complete diagnostic system, enabling technicians to document system performance, share findings with team members, and maintain comprehensive maintenance records.

Professional Applications

Electrical Safety Compliance

Safety engineers and inspectors rely on the UT251C+'s high sensitivity and precision for:

• Ground fault detection in electrical installations
• Regulatory compliance verification
• RCD/GFCI trip current verification
• Insulation degradation monitoring
• Personnel safety system testing

Industrial Maintenance

Maintenance technicians leverage the UT251C+'s specialized features for:

• Motor insulation condition assessment
• Equipment leakage monitoring for predictive maintenance
• Identifying deteriorating components before failure
• Ground fault troubleshooting
• Electrical system health assessment

HVAC and Refrigeration

HVAC technicians depend on the UT251C+'s sensitivity and measurement range for:

• Compressor leakage diagnostics
• Fan motor insulation testing
• Control circuit troubleshooting
• System component leakage verification
• Preventive maintenance inspections

Data Center Infrastructure

IT and facility technicians utilize the UT251C+ for:

• UPS system leakage verification
• Power distribution unit monitoring
• Server rack grounding integrity testing
• Identifying potential electrical hazards
• Verifying clean power delivery

Technical Specifications

Additional Features

• Display Count: 3000
• Display Type: HTN LCD with dual display and backlight
• True RMS Measurement: Yes
• Jaw Size: 40mm measureable diameter
• LPF Function: Yes
• Sample Rate: 2 times/second
• Auto Range: Yes
• MAX/MIN Recording: Yes
• Data Hold: Yes
• Backlight: Yes
• Data Transmission: Bluetooth
• Flashlight: Yes
• Low Battery Indication: Yes
• Safety Rating: CAT III 600V
• Power Supply: AAA 1.5V x 3
• Product Dimensions: 200.1 x 70.5 x 40mm
• Weight: Approximately 350g

Package Contents

• UNI-T UT251C+ Leakage Current Clamp Meter
• Cloth Carrying Bag
• User Manual
• 3 x AAA Batteries

Product Comparison

Frequently Asked Questions

What is a leakage current clamp meter and how does it differ from standard clamp meters?

A leakage current clamp meter like the UT251C+ is specifically designed to measure very small currents (in the milliamp or even microamp range) that "leak" from electrical circuits to ground or between conductors. While standard clamp meters typically measure load currents (amps drawn by operating equipment), leakage clamp meters feature significantly higher sensitivity and resolution, specialized filtering to eliminate interference, and design optimizations to detect currents as small as 1µA. The UT251C+ offers 1000 times more sensitivity than typical clamp meters, allowing for precise measurement of currents that could indicate insulation failures, ground faults, or potential safety hazards before they become critical problems.

How does the LPF (Low Pass Filter) function improve measurement accuracy?

The UT251C+'s Low Pass Filter function significantly improves measurement accuracy by eliminating high-frequency noise and interference that can affect leakage current readings. In modern electrical environments with variable frequency drives, switching power supplies, and electronic equipment, high-frequency components can cause false readings on standard instruments. The LPF function filters out these high-frequency signals, allowing the meter to capture only the true leakage current at the power frequency (typically 50/60Hz). This ensures that readings represent actual leakage conditions rather than electromagnetic interference, enabling technicians to make accurate assessments of insulation health and electrical safety.

Why is harmonic measurement important for leakage current analysis?

Harmonic measurement is crucial for comprehensive leakage current analysis because modern electronic equipment often generates non-sinusoidal currents with significant harmonic content. The UT251C+'s ability to analyze harmonics up to the 20th order allows technicians to identify not just the magnitude of leakage current, but also its frequency composition. Different harmonic patterns can help diagnose specific issues - for example, 3rd harmonic dominance might indicate neutral conductor problems, while higher harmonics could point to switching power supply issues. Understanding the harmonic profile of leakage currents helps technicians pinpoint the source of problems, differentiate between normal operational leakage and developing faults, and implement targeted corrective measures.

How does the Bluetooth connectivity enhance the UT251C+'s capabilities?

The UT251C+'s Bluetooth connectivity transforms the meter from a simple measurement tool into a complete diagnostic system by connecting with the UNI-T Smart Measure application. This connection enables technicians to record measurement data over time, creating trend analysis that reveals intermittent issues or progressive insulation degradation that single readings might miss. The ability to generate professional reports with measurement data and system information streamlines documentation for compliance records, maintenance history, and team collaboration. Additionally, the remote monitoring capability allows technicians to position the meter in difficult-to-access locations while viewing readings from a safe distance, enhancing both safety and efficiency during testing.

What is the warranty period for the UNI-T UT251C+?

UNI-T provides a 1-year warranty on the UT251C+, covering manufacturing defects and component failures under normal use conditions. This standard warranty ensures your investment in professional measurement equipment is protected, giving you confidence in your purchase decision.

Support and Warranty

UNI-T stands behind the UT251C+ with comprehensive technical support and a 1-year warranty. Our dedicated support team is available to assist with application questions, measurement techniques, and warranty service.

Professional-Grade Leakage Current Measurement

The UNI-T UT251C+ Leakage Current Clamp Meter delivers exceptional sensitivity, accuracy, and specialized features for demanding electrical safety and maintenance applications. With its 3000-count display, 40mm jaw opening, and industry-leading 1µA resolution, it provides reliable performance for maintenance professionals who need to detect, measure, and analyze leakage currents in today's complex electrical systems.

Order Your UNI-T UT251C+ Today and Experience Professional-Grade Leakage Current Measurement Capabilities