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
UT281E+
UT281F
Max AC current
9.99 kA
10 kA
Inrush current
Yes
—
Power measurement
—
Active / apparent / reactive, PF, phase
Connectivity
—
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.
Specifications
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 MΩ
Max Resistance
60 MΩ
Power Factor
-1 to 1
Phase Angle
-360°–360°
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
3× AA
Ambient Temperature Range
0 °C to 40 °C
Frequency Response
50 Hz to 500 Hz
⚠️ WARNING (California Proposition 65): This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.
