UT281 series can measure large currents in various harsh and hard to reach environments. They are designed with Rogowski flex coil and can test up to 3000A AC current. UT281A/C are from UNI-T’s Pro Line series, which meet IP54 and 2m drop proof requirements. Due to the ease in operation, accurate readings, stable performance and reliable quality, these flex clamps are ideal tools for electricians.
Models in UT281 series: UT281A, UT281C, UT281E
Features of UT281 Series True RMS Flex Clamps
Certificates: CE, UKCA, cETLus
● 2m drop proof, ETL/Intertek certified 3rd edition CE
● Coil diameter: 0.75cm, bending length: 45.7cm
● Large LCD display for clear reading
● True RMS
● Long press INRUSH key for 2s to measure inrush current
● Data hold, backlight, auto power off
Specifications of UT281 Series True RMS Flex Clamps
| Specifications | Range | UT281A | UT281C | UT281E |
| AC current (A) | 30A/300A/3000A | ±(3%+5) | ±(3%+5) | ±(3%+5) |
| Frequency response | 45Hz~500Hz
(sine wave) |
√ | √ | √ |
| Inrush current | 0.5A~3000A
(for reference) |
√ | √ | √ |
| AC voltage (V) | 600V | ±(1.2%+3) | ||
| Resistance (Ω) | 60MΩ | ±(1.2%+3) | ||
| Frequency (Hz) | 20Hz~30kHz | ±(1%+2) | ||
| Features | ||||
| Range selection | Manual | Manual | Auto (manual range available in current measurement) | |
| Flex coil size | 10”(25.4cm) radius: 1.5”(3.8cm) |
18” (45.7cm) radius: 3.1”(8cm) |
18” (45.7cm) radius: 3.1” (8cm) |
|
| Display count | 3000 | 3000 | 6000 (3000 in current measurement) |
|
| Refresh rate | 3 times/s | 3 times/s | 3 times/s | |
| True RMS | √ | √ | √ | |
| Display interface (LCD) | Single | Single | Dual | |
| Data hold/Buzzer | √ | √ | √ | |
| Auto power off | √ | √ | √ | |
| Low battery indication | √ | √ | √ | |
| Backlight/Function selection | √ | √ | √ | |
| 2m drop test | √ | √ | √ | |
| IP rating | IP54 | IP54 | ||
| General Characteristics | ||||
| Power | 1.5V battery (R03) x 3 | |||
| Display | 32 x 34mm (1.8 inches) | |||
| Product color | Red and grey | |||
| Product net weight | UT281A: 220g; UT281C: 236g; UT281E: 250g | |||
| Product size | UT281A: 300mm x 150mm x 55mm; UT281C: 350mm x 190mm x 55mm; UT281E: 325mm x 180mm x 30mm | |||
| Standard accessories | Batteries, PC software CD (UT281A), test leads (UT281E) | |||
| Standard individual packing | Gift box, blister, English manual | |||
| Standard quantity per carton | UT281A/UT281C: 8pcs; UT281E: 10pcs | |||
| Standard carton measurement | UT281A: 580mm x 380mm x 180mm; UT281C: 420mm x 355mm x 425mm; UT281E: 435mm x 380mm x 245mm | |||
| Standard carton gross weight | UT281A: 4.9kg; UT281C: 6.2kg; UT281E: 6.3kg | |||
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