{"product_id":"ut281f-true-rms-flex-clamp-sensor","title":"UNI-T UT281F Flexible AC Power Clamp Meter — 10,000A","description":"\u003cp\u003eThe \u003cstrong\u003eUNI-T UT281F\u003c\/strong\u003e combines a flexible AC current sensor with power measurement and Bluetooth data transfer. Its 1,100 mm coil fits around large conductors, with an AC current range up to 10,000A. It is intended for electrical testing by qualified users following the manufacturer’s operating instructions.\u003c\/p\u003e \u003cstyle\u003e\n.ut-cat{color:#333;font-family:Arial,Helvetica,sans-serif;line-height:1.5;}\n.ut-cat h4{color:#1a1a1a;font-size:1.15em;margin:1.5em 0 .5em;padding-bottom:.25em;border-bottom:2px solid #ccc;}\n.ut-cat h2{color:#1a1a1a;font-size:1.25em;margin:1.2em 0 .4em;}\n.ut-cat h3{color:#222;font-size:1.05em;margin:1em 0 .3em;}\n.ut-cat p{margin:.6em 0;}\n.ut-cat ul{margin:.5em 0;padding-left:1.4em;}.ut-cat li{margin:.25em 0;}\n.ut-cat img{max-width:100%;height:auto;}\n.ut-cat table{border-collapse:collapse;width:100%;margin:.5em 0;}\n.ut-cat th,.ut-cat td{border:1px solid #ddd;padding:6px 10px;text-align:left;vertical-align:top;}\n.ut-cat td strong{color:#222;}\n\u003c\/style\u003e\n\u003cdiv class=\"ut-cat\"\u003e\n\n\u003ch4\u003eOverview\u003c\/h4\u003e\n\u003cdiv class=\"product-container\"\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eTrue-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.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFlexible 1100 mm coil for large and awkward conductors\u003c\/li\u003e\n\u003cli\u003eAC current up to 10 kA (45 Hz–1000 Hz)\u003c\/li\u003e\n\u003cli\u003ePower measurement: active, apparent, reactive, with power factor and phase angle\u003c\/li\u003e\n\u003cli\u003eTrue-RMS measurement; dual display\u003c\/li\u003e\n\u003cli\u003eAC\/DC voltage to 1000 V; resistance to 60 MΩ; continuity\u003c\/li\u003e\n\u003cli\u003eBluetooth 5.0 for data transfer; 1050-set storage\u003c\/li\u003e\n\u003cli\u003eCAT III 1000 V \/ CAT IV 600 V; AA battery power\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eUT281F Details\u003c\/h2\u003e\n\u003ch3\u003eFlexible-Coil High-Current Measurement\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003ch3\u003ePower, Not Just Current\u003c\/h3\u003e\n\u003cp\u003eBeyond 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.\u003c\/p\u003e\n\u003ch3\u003eDocumentation-Ready\u003c\/h3\u003e\n\u003cp\u003eTrue-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.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eCompare the UT281 Series\u003c\/h2\u003e\n\u003ctable class=\"product-spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003cth\u003eUT281E+\u003c\/th\u003e\n\u003cth\u003eUT281F\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax AC current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9.99 kA\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e10 kA\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInrush current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e—\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower measurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eActive \/ apparent \/ reactive, PF, phase\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnectivity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eBluetooth 5.0\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData storage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e999 sets\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1050 sets\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJaw opening\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1000 mm\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1100 mm\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eApplications\u003c\/h2\u003e\n\u003cp\u003eFeeder 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.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"product-container\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003ch3\u003eWhat does the UT281F measure beyond current?\u003c\/h3\u003e\n\u003cp\u003eActive, apparent, and reactive power, with power factor and phase angle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003ch3\u003eHow large a conductor can it measure?\u003c\/h3\u003e\n\u003cp\u003eIts 1100 mm flexible coil wraps around large busbars and cable bundles; AC current measures up to 10 kA.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"product-faq-item\"\u003e\n\u003ch3\u003eHow is it different from the UT281E+?\u003c\/h3\u003e\n\u003cp\u003eThe UT281E+ measures current with inrush capture; the UT281F adds full power measurement and Bluetooth 5.0 transfer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDC Voltage In\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1000 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Voltage In\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1000 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Current In\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 kA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAC Current Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e45 Hz to 1000 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 Hz to 30 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Resistance Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60 MΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Factor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-1 to 1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhase Angle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-360°–360°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTrue RMS\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContinuity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDual Display\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData Communication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBT 5.0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eData Storage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1050 sets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCAT Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCAT III 1000 V , CAT IV 600 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eJaw Opening\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1100 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual LCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3× AA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAmbient Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0 °C to 40 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency Response\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e50 Hz to 500 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\n\u003c\/div\u003e \u003cp\u003eExplore \u003ca href=\"\/collections\/uni-t\"\u003eUNI-T instruments\u003c\/a\u003e and our \u003ca href=\"\/collections\/test-measurement\"\u003etest and measurement collection\u003c\/a\u003e.\u003c\/p\u003e","brand":"UNI-T","offers":[{"title":"Default Title","offer_id":60717038305566,"sku":"180200100739X","price":274.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1101\/2148\/4574\/files\/UT281F-1_sq.jpg?v=1793223821","url":"https:\/\/apextechnica.com\/products\/ut281f-true-rms-flex-clamp-sensor","provider":"Apex Technica","version":"1.0","type":"link"}