{"id":25257,"date":"2026-10-08T10:27:18","date_gmt":"2026-10-08T10:27:18","guid":{"rendered":"https:\/\/www.kcsensor.com\/open-channel-flow-meter-incorrect-flow-rectangular-weir\/"},"modified":"2026-10-14T09:24:14","modified_gmt":"2026-10-14T09:24:14","slug":"open-channel-flow-meter-incorrect-flow-rectangular-weir","status":"publish","type":"post","link":"https:\/\/www.kcsensor.com\/cs\/open-channel-flow-meter-incorrect-flow-rectangular-weir\/","title":{"rendered":"Pond-Inlet Flow Monitoring Over a Rectangular Weir \u2014 Thailand"},"content":{"rendered":"

Pozad\u00ed & amp; V\u00fdzva<\/h2>\n\n\n\n

The customer monitors the flow entering a pond in Thailand through an open channel. Because the channel is fitted with a rectangular weir<\/strong>, KOCF3000 ultrasonic open-channel flow meter<\/a> does not measure flow directly; it measures the water level above the weir and converts that level into a flow rate using the weir equation.<\/p>\n\n\n\n

The reported problem was that the flow displayed by the instrument did not agree with the actual flow through the channel. The level reading itself looked plausible, so the error was not obvious from the display alone.<\/p>\n\n\n\n

Why the KOCF3000<\/h2>\n\n\n\n

An ultrasonic open-channel flow meter is a non-contact solution. The sensor is mounted above the channel and never touches the water, so it is not affected by the solids, debris, or algae that foul submerged instruments in an open channel.<\/p>\n\n\n\n

The KOCF3000 supports standard hydraulic structures \u2014 rectangular weir, V-notch weir, and Parshall flume \u2014 and performs the level-to-flow conversion internally, which makes it a good fit where a weir is already installed and only the flow calculation needs to be added.<\/p>\n\n\n\n

\"KOCF3000
On-site photo from the Thailand installation \u2014 the open-channel flow measuring point at the pond inlet (customer-provided).<\/figcaption><\/figure>\n\n\n\n

\u0158e\u0161en\u00ed & amp; Instalace<\/h2>\n\n\n\n

Three points were checked in turn, and all three explained the discrepancy:<\/p>\n\n\n\n