UT281E+ 10,000A Flexible AC Current Meter

UNI-T UT281E+ 10000A True RMS Flexible Clamp Meter

10,000 Amps Through a 43-Inch Flexible Coil—High-Current Measurement Without the Limitations of Rigid Clamps

The UNI-T UT281E+ is a True RMS flexible clamp meter built for electricians and power system professionals who need to measure extreme currents in spaces where rigid clamp meters can't reach. Its 1100mm (43-inch) Rogowski coil wraps around conductors up to 340mm in diameter—bus bars, cable bundles, oversized feeders—and measures up to 10,000A AC with 6000-count precision. Combined with AC/DC voltage measurement to 1000V, resistance to 60MΩ, inrush current capture to 6000A, and 999-set data storage, the UT281E+ gives you the measurement range of expensive power analyzers in a handheld, field-ready instrument rated CAT III 1000V / CAT IV 600V. If you need to check loads on main feeders, profile motor startup currents, or verify output on large-scale solar installations without shutting anything down, this is the tool that gets it done.

Key Features

• 10,000A AC Current Range: Measure main feeders, bus bars, and large motor circuits that exceed the capacity of standard 600A or 1000A clamp meters
• 1100mm (43-Inch) Flexible Rogowski Coil: Thread around conductors up to 340mm diameter in crowded panels, tight switchgear, and cable trays where rigid clamps won't fit
• True RMS Measurement: Accurate readings on non-sinusoidal waveforms from VFDs, switching power supplies, and other non-linear loads that produce distorted current
• 6000A Inrush Current Capture: Record motor and transformer startup spikes for proper breaker sizing and equipment health assessment
• AC/DC Voltage to 1000V: Full voltage measurement capability for system diagnostics without switching tools
• Resistance to 60MΩ with Continuity: Complete circuit testing from a single instrument
• Dual LCD Display: Shows current and frequency simultaneously—see both readings at a glance during power quality checks
• 999-Set Data Storage: Record measurements across a full system survey and review them later—no hand-written logs
• CAT III 1000V / CAT IV 600V Safety Rating: Industrial-grade protection for work on distribution systems and service entrances
• High Voltage Alarm: Audible and visual alert when dangerous voltage levels are detected

Built for the Jobs Rigid Clamp Meters Can't Handle

Every industrial electrician has encountered the measurement that their standard clamp meter simply cannot perform—a 4/0 feeder bundle too thick for the jaws, a bus bar in a switchboard with zero clearance, or a cable run buried in a tray with no access to separate conductors. The UT281E+ eliminates these limitations. The 1100mm flexible coil threads through tight spaces, wraps around irregular shapes, and accommodates conductors up to 340mm in diameter. You're measuring in seconds, not spending twenty minutes figuring out how to get a rigid clamp around a conductor.

The 10,000A range means you won't hit the ceiling on heavy industrial loads, either. Main distribution feeders in manufacturing plants, smelting operations, large commercial buildings, and utility substations routinely carry currents that exceed what a 1000A or even 3000A clamp meter can read. The UT281E+ covers the full range with True RMS accuracy, so you get correct readings even on the distorted waveforms produced by variable frequency drives and other non-linear loads that are increasingly common in modern industrial facilities.

Inrush Current That Tells You What Startup Measurements Can't

The UT281E+ captures inrush current up to 6000A—the brief but massive current spike that occurs when motors, transformers, and large inductive loads are first energized. This transient event can be 6 to 10 times higher than normal operating current and is invisible to standard current measurements. Capturing it gives you the data you need to properly size protective devices, diagnose nuisance tripping, assess motor health, and verify that starting circuits are performing within specification. Without inrush capture, you're making decisions about protective coordination based on incomplete information.

Complete Measurement Capability in One Instrument

Beyond high-capacity current measurement, the UT281E+ provides a complete electrical measurement suite that eliminates the need to carry multiple instruments:

• AC voltage measurement up to 1000V with True RMS precision
• DC voltage measurement up to 1000V for battery systems and DC circuits
• Frequency measurement on both current (10Hz–1000Hz) and voltage (10Hz–30kHz) channels
• Resistance measurement across six ranges up to 60MΩ
• Continuity testing with audible indication
• Dual display showing current and frequency simultaneously
• Data hold for capturing readings in awkward positions
• Auto power-off and low battery indication for reliable field operation

Technical Specifications

Package Contents

• UNI-T UT281E+ Flexible Clamp Meter, 1 piece
• Test Leads, 1 set
• AAA Batteries, 3 pieces
• User Manual, 1 piece
• Carrying Case, 1 piece
• Certificate of Calibration, 1 piece

UT281E+ vs. UT281F—Which Flexible Clamp Do You Need?

The UT281E+ and UT281F share the same 10,000A range, 1100mm flexible coil, True RMS engine, and CAT III 1000V / CAT IV 600V safety rating. Both are built for the same demanding industrial environments. The difference is in what they do beyond basic current measurement—and whether you need those additional capabilities.

The UT281E+ is the straightforward choice for electricians and maintenance professionals who need reliable high-current measurement, voltage, resistance, and inrush capture. It does these core functions exceptionally well, stores 999 measurements, and doesn't require a phone or app to operate. If your work is primarily about verifying loads, profiling startup currents, and troubleshooting circuits, the UT281E+ delivers everything you need without complexity you won't use.

The UT281F adds power analysis capabilities—active power (kW), apparent power (kVA), reactive power (kVAR), energy accumulation (kWh), power factor, and phase angle measurement—plus Bluetooth 5.0 connectivity to the UNI-T Smart Measure app for wireless data logging and report generation. It also extends the low-end current range down to 100mA, making it useful for detecting smaller parasitic loads. If you're doing energy audits, commissioning power systems, billing verification, or documenting power quality for clients, the UT281F's power analysis and reporting features justify the step up.

Frequently Asked Questions

What advantages does the flexible coil provide over a rigid clamp meter?

The UT281E+'s 1100mm flexible coil solves three problems that rigid clamps cannot: access, conductor size, and measurement versatility. It threads through crowded panels and tight switchgear where there's no room to open rigid jaws. It wraps around conductors up to 340mm in diameter—far beyond the 30-60mm limitation of most rigid clamps. And it conforms to irregular shapes like bus bars and cable bundles that rigid jaws can't grip properly. For industrial electricians working on large distribution equipment, the flexible coil isn't a convenience—it's the difference between getting the measurement and not.

Why does the 10,000A range matter for my work?

Many industrial facilities have main feeders, bus bars, and motor circuits carrying currents well above 1000A. A standard clamp meter maxes out and can't give you the reading. The UT281E+ measures across the full range from under 10A to 10,000A, meaning one tool covers everything from branch circuits to main service feeders. This eliminates the need for specialized CT installations or system shutdowns to install measurement equipment, saving time and keeping systems running.

How does inrush current capture help with troubleshooting?

Motor and transformer startup currents can spike to 6-10x normal operating current for a fraction of a second. These transients are invisible to standard measurements but are the root cause of nuisance tripping, undersized protective devices, and premature equipment failure. The UT281E+ captures inrush events up to 6000A, giving you hard data for breaker coordination, motor health assessment, and startup circuit verification.

Do I need the UT281F instead of the UT281E+?

If your work is focused on current measurement, voltage checks, and inrush profiling, the UT281E+ is the right choice—it excels at these core functions with a higher inrush capture range (6000A vs. 1000A). If you also need to measure power (kW, kVA, kVAR), log energy consumption (kWh), calculate power factor, or generate reports via Bluetooth, the UT281F adds those capabilities. See the comparison table above for a full feature breakdown.

What is the warranty on the UT281E+?

UNI-T provides a 1-year warranty on the UT281E+ covering manufacturing defects and component failures under normal use conditions.

Support and Warranty

UNI-T stands behind the UT281E+ 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.

High-Current Measurement Without Compromise

The UNI-T UT281E+ 10000A True RMS Flexible Clamp Meter delivers the current range, coil flexibility, and measurement precision that industrial electricians and power professionals need for demanding high-current applications. With its 1100mm flexible coil, 6000A inrush capture, comprehensive voltage and resistance measurement, and CAT III 1000V / CAT IV 600V safety rating, it's the tool that gets the reading when rigid clamp meters can't.

Order Your UNI-T UT281E+ Today—10,000A of Flexible Current Measurement for Industrial Professionals