UNI-T UT281F Flexible AC Power Clamp Meter
Overview
The UT281F pairs a flexible 1100 mm coil with power measurement: it reads AC current up to 10 kA on large or awkward conductors and, beyond current, measures active, apparent, and reactive power with power factor and phase angle β so you can assess load behaviour on a big feeder, not just its current. It's rated CAT III 1000 V / CAT IV 600 V.
True-RMS sensing, a dual display, Bluetooth 5.0 for transfer, and storage for 1050 result sets make it a documentation-ready tool for utility and industrial power work. It's backed by UNI-T's nearly 40 years of test-meter manufacturing.
Key Features
- Flexible 1100 mm coil for large and awkward conductors
- AC current up to 10 kA (45 Hzβ1000 Hz)
- Power measurement: active, apparent, reactive, with power factor and phase angle
- True-RMS measurement; dual display
- AC/DC voltage to 1000 V; resistance to 60 MΞ©; continuity
- Bluetooth 5.0 for data transfer; 1050-set storage
- CAT III 1000 V / CAT IV 600 V; AA battery power
UT281F Details
Flexible-Coil High-Current Measurement
The 1100 mm flexible coil wraps around busbars, cable bundles, and large conductors a rigid clamp can't reach, measuring AC current up to 10 kA across a 45 Hzβ1000 Hz band.
Power, Not Just Current
Beyond current, the UT281F measures active, apparent, and reactive power with power factor and phase angle β so you can see how a feeder is actually loaded and where reactive power and poor power factor are costing capacity.
Documentation-Ready
True-RMS sensing on a dual display, Bluetooth 5.0 transfer, and storage for 1050 result sets make it straightforward to capture and move power readings for reports and load studies.
Compare the UT281 Series
| UT281E+ | UT281F | |
|---|---|---|
| Max AC current | 9.99 kA | 10 kA |
| Inrush current | Yes | β |
| Power measurement | β | Active / apparent / reactive, PF, phase |
| Connectivity | β | Bluetooth 5.0 |
| Data storage | 999 sets | 1050 sets |
| Jaw opening | 1000 mm | 1100 mm |
Applications
Feeder and busbar power studies; load and power-factor assessment on large industrial and utility circuits; high-current measurement on conductors a clamp can't reach; and maintenance work that needs power figures documented.
Frequently Asked Questions
What does the UT281F measure beyond current?
Active, apparent, and reactive power, with power factor and phase angle.
How large a conductor can it measure?
Its 1100 mm flexible coil wraps around large busbars and cable bundles; AC current measures up to 10 kA.
How is it different from the UT281E+?
The UT281E+ measures current with inrush capture; the UT281F adds full power measurement and Bluetooth 5.0 transfer.
Warranty
This product includes a standard 1-year warranty covering manufacturing defects and component failures under normal use conditions.
UNI-T stands behind every product we sell. If you experience any issues within the warranty period, our US-based support team is here to help with troubleshooting, repair, or replacement.
| DC Voltage In | 1000 V |
| AC Voltage In | 1000 V |
| AC Current In | 10 kA |
| AC Current Frequency | 45 Hz to 1000 Hz |
| Frequency Range | 10 Hz to 30 kHz |
| Internal Resistance Range | 60 MΞ© |
| Max Resistance | 60 MΞ© |
| Power Factor | -1 to 1 |
| Phase Angle | -360Β°β360Β° |
| True RMS | Yes |
| Continuity | Yes |
| Dual Display | Yes |
| Data Communication | BT 5.0 |
| Data Storage | 1050 sets |
| CAT Rating | CAT III 1000 V , CAT IV 600 V |
| Jaw Opening | 1100 mm |
| Display Type | Dual LCD |
| Battery | 3Γ AA |
| Ambient Temperature Range | 0 Β°C to 40 Β°C |
| Frequency Response | 50 Hz to 500 Hz |
Authentic UNI-T accessories are an affordable way to extend the functionality of your instrument.
