{"product_id":"open-channel-flow-meter","title":"Open Channel Flow Meter","description":"\u003ch1\u003eThe Sper Scientific Open Channel Flow Meter calculates water flow from measured liquid level and the level-to-flow relationship of a compatible measuring weir.\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eApplications include wastewater discharge points and municipal sewer channels.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cspan\u003eThe wall-mounted ultrasonic open channel flow meter measures water level without contacting the liquid. A sensor transmits ultrasonic pulses toward the water surface and measures the time taken for the echoes to return. The meter uses this distance measurement to determine water level, then calculates flow using the level-to-flow relationship for the configured weir or flume.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe display shows instantaneous flow rate, accumulated flow and water level. Non-contact measurement keeps the sensor away from wastewater, reducing exposure to contamination and corrosion. Accurate flow measurement requires a compatible measuring structure, proper installation and suitable free-flow conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis method is used to monitor water and wastewater flow in open channels, including wastewater treatment plant discharge channels, industrial effluent outlets and municipal sewer systems. Accurate results depend on proper weir installation, correct level measurement and selection of the appropriate flow calculation.\u003c\/span\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eWater and wastewater treatment\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePower generation and mining\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFood processing\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePetrochemical facilities\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntake channels, drainage channels and discharge outlets\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eStream and river monitoring at suitable measuring structures\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eIntegration with process monitoring and control systems\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMain Features\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eWater level, instantaneous flow and accumulated flow display\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSettings backup and restoration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eConfigurable analog output\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDigital filtering and echo recognition\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eManually configurable suppression of fixed interference echoes\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eCustom mathematical calculations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAdjustable sound velocity for specific measurement conditions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLevel-to-volume conversion for configured vessels; weight calculation requires appropriate volume and density settings\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eBluetooth, GPRS and Wi-Fi connectivity, depending on configuration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptional custom serial data format, specified when ordering\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOptional Mini SD card data logging, USB output and microprinter support, specified when ordering\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003ePart number\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e870023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eFlow range\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e0.1 L\/s–10 m³\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eFlow accuracy\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e±1–3%, depending on measuring weir\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eMaximum level\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e3 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eLevel accuracy\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e±0.3% within 3 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eResolution\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eTotalizer\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e12-digit decimal; resets when accumulation capacity is reached\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eOutput\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e4–20 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eCommunication\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003eRS485 Modbus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eRelay options\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e1–4 outputs; please specify when ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003ePower options\u003c\/th\u003e\n\u003ctd style=\"text-align: left;\"\u003e220 VAC, 50 Hz or 12–36 VDC, 3 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSignal input (Please specify when ordering)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003eDigital signal: RS485 (supports Modbus protocol)\u003cbr\u003eCurrent signal: 4-20mA\u003cbr\u003eTransducer signal: voltage\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSignal output (Please specify when ordering)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003eVoltage output: DC12V or 24V\u003cbr\u003eAnalog output signal: 0 ~ 20mA; 4 ~ 20mA load \u0026gt; 300Ω; 0 ~ 5V; 0 ~ 10V\u003cbr\u003eDigital output: RS485 (support Modbus); USB, memory card 8G\u003cbr\u003eWireless transmission: built-in GPRS wireless communication optional SMS data prompt (acquisition system can be customized)\u003cbr\u003eSwitch output: two NPN\/3 relays (AC: 5A 250V DC: 10A 24V)\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePower\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"padding-left: 40px;\"\u003eWorking voltage: DC12-24V or AC160V~250V\u003cbr\u003eNormal power consumption: \u0026lt;5W\u003c\/p\u003e\n\u003ch4\u003eDownloads\u003c\/h4\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cstrong\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/800002-i.pdf?v=1598908085\" target=\"_blank\"\u003e \u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/OCFM_Open-channel_flow_meter.doc\" title=\"Open Channel Flow Meter Users Manual\" rel=\"noopener\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/pdf-icon-63x63_480x480.png?v=1598991821\" style=\"float: left;\" alt=\"PDF\"\u003e\u003c\/a\u003e \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/800002-i.pdf?v=1598908085\" target=\"_blank\"\u003e\u003cbr\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/OCFM_Open-channel_flow_meter.doc\" title=\"Open Channel Flow Meter Users Manual\" rel=\"noopener\" target=\"_blank\"\u003eSper Scientific Open Channel Flow Meter Instruction Manual\u003c\/a\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eFAQs\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eHow is flow determined?\u003c\/strong\u003e\u003cbr\u003eFrom liquid level and the selected weir’s level-to-flow relationship.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat affects flow accuracy?\u003c\/strong\u003e\u003cbr\u003eThe measuring weir used in the installation.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Sper Scientific","offers":[{"title":"Default Title","offer_id":68122682392800,"sku":"870023","price":350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/open-channel-flow-meter-870023-9595764.webp?v=1793360777","url":"https:\/\/sper-direct.myshopify.com\/products\/open-channel-flow-meter","provider":"Sper Scientific Direct","version":"1.0","type":"link"}