UT281F True RMS Flex Clamp Sensor

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 — 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 Hz–1000 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 MΩ; 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 Hz–1000 Hz band.

Power, Not Just Current

Beyond current, the UT281F measures active, apparent, and reactive power with power factor and phase angle — 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

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