IS-4000 Open Channel Flowmeter

An economical open-channel flow meter, IS-4000 measures the level, flow rate, and total volume of water flowing through weirs and flumes. The meter includes a non-contact ultrasonic level sensor to detect the water level and then calculates the flow rate and total volume using the Gauckler-Manning or other equations based on the characteristics of the channel. All the measurements are available over Modbus RTU or Modbus TCP Ethernet and can be logged for
historical records.


  • Measure level, flow rate, and total volume with a single device
  • Simple setup for flumes and weirs
  • Retain a historical log of all measurements
  • Easily connect up to SCADA systems
  • Connectivity with BEACON Advanced Metering Analytics (AMA) or AquaCUE Flow Measurement Manager
  • Rugged IP67 powder-coated aluminum enclosure


Open channels with a primary device are a cost-effective solution for managing varying flow rates in unpressurized systems. The IS-4000 flow meter performs best when used with a primary device, such as a flume or weir, and where the sediment does not build up.

• Flow into water treatment plants from reservoirs
• Storm and sanitary sewer systems
• Effluent from water resource recovery or wastewater treatment
• Industrial discharge
• Agriculture irrigation channels