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Catalog:Environmental Flow Monitoring 
Global Water Open Channel Flow Monitor (FC103) Global Water Open Channel Flow Monitor (FC103) Measure and Totalize Flows in Open Channels Bright LED flow and total display User defined engineering units and depth-to-flow relationship Highly accurate depth probe Output signal for recorders or displays Sampler triggering output Weatherproof enclosure Description The Global Open Channel Flow Monitor is reliable and accurate for measuring and totalizing open channel flows for all flumes and weirs, as well as any gravity-type open flow channel. The Global Open Channel Flow Monitor measures water depth with the highly accurate Global Water pressure transducer. The flow computer instantly calculates and displays flow and total for any depth-to-flow relationship in any engineering units. The Global Open Channel Flow Monitor is easily set up in the field using its unique three-button programming system. Open Channel Flow For any open channel that is free flowing, there is a specific relationship between depth of water and the flow rate. Whenever a given depth occurs, there will always be the same flow. Therefore, if you know the flow for each depth, you can construct a depth-to-flow relationship. When this relationship is constructed in the Open Channel Flow Monitor, the flow computer automatically displays the flow for any depth that is reached. This flow is logged over time to display total flow. When using a primary device to measure flow, such as a measuring flume or weir, there is a mathematical relationship between depth and flow. When measuring flow in a channel that does not have a primary device, the depth-to-flow table can be constructed by measuring the flow at several different depths, using the Global Flow Probe. Depth Measurement The Global Open Channel Flow Monitor measures depth-of-flow with the highly-accurate Global Water Level Sensor, which uses a fully submersible sensor constructed of stainless steel. The standard level range is from 0 to 3' of water, which provides for accurate measurements of flow even with depth changes as small as a fraction of an inch. The pressure transducer is mounted slightly below the "zero" flow depth of the channel, upstream from the throat of the flume or weir. For open channels with no primary device, the sensor is mounted below the lowest expected water depth. The sensor has a 2-wire 4-20 mA signal, so it can be mounted several hundred feet away from the Flow Monitor, if required. The sensor and monitor can be connected with standard, twisted-pair signal wire. Display and Outputs The Open Channel Flow Monitor displays flow rate and totalized flow on a large 5-digit 0.56" red LED display. The display can toggle between Rate and Total by pushing one of the front panel buttons. The display reads in user-defined units of flow, including: MGD, CFS, GPM, M3S or any engineering units. The Global Open Channel Flow Monitor also produces an analog 4-20 mA output signal that is proportional to flow. This can be used for chart recorders, dataloggers, or as an input to telemetry or process control systems. In addition, the Flow Monitor has a flow-proportional output signal for triggering water samplers. Flow Computer The Global Open Channel Flow Monitor has a powerful internal flow computer which calculates and totalizes flow. The desired engineering units and ten points from the depth-to-flow table are entered into the flow computer by following simple instructions. All entries are made using three front panel push buttons. It is not necessary to open the enclosure. The unit's manual includes depth-to-flow tables for all standard flumes and weirs. Enclosure The enclosure is made of weatherproof injection molded plastic. It can be washed or hosed down, and is suitable for use in a wide variety of environments. The enclosure can be wall mounted and fitted with conduit for sensor and power connections, if required. Input: 4-20 mA from provided Water Level Pressure Transducer Output: Isolated 4-20 mA proportional to flow, pulse output proportional to flow for sampler triggering. Display: 5 digit, 0.56" high, red LED Input Impedance: 1 Meg Ohm Accuracy: Pressure transducer: 0.2% FS, Flow Monitor: 0.3% Internal Resolution: 16 bit Flow Units: Any Engineering Unit Totalizer: Related to Flow Units Flow Calculation: 10-point best fit Enclosure: NEMA 4X rate ruggedized injection molded polyethylene, 10" x 12" x 6" Sensor: Piezoresistive amplified to 4-20 mA, 3/4" X 8" Cable: 25' Polyethylene Jacketed, shielded, 2 wire, vented Power: 120 VAC to 240 VAC Options and Prices FC103 Open Channel Flow Monitor, 0-3' depth sensor..........$1,395 FC120 Open Channel Flow Monitor, 0-20' depth sensor........$1,395 FC10M Open Channel Flow Monitor, 0-10 M depth sensor....$1,395 Please select from the menu below
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