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

System Specifications

Measurement Principle: Non-contact ultrasonic level sensor; converts water depth to flow rate/volume using formulas (e.g., Gauckler-Manning).
Applications: Flow into water treatment plants, storm/sewer systems, industrial discharge, and agricultural irrigation channels (no sediment buildup).

Channel Selection:

Weirs: Contracted/suppressed rectangular, Cipoletti, V-notch (30°, 45°, 60°, 90°)
Flumes: Parshall (1–60 in.), Manhole (4–12 in.), Manning rectangle (up to 9.8 ft/6 m)
Other: Manning pipe, exponential equation
Enclosure: Rugged die-cast powder-coated aluminum, IP67

Electronics & Power

Power Supply: 92–275 V AC (50/60 Hz), <14 VA
Display: Graphical LCD (64×128) with backlight for flow rate, totalizers, and status
Configuration: 3 front-panel push-buttons or via mini USB with Flow Meter Tool software
Communication: RS485 Modbus RTU, Modbus TCP/IP Ethernet, USB, BEACON AMA or AquaCUE integration

Outputs/Inputs:

Analog: 4–20 mA, 0–20 mA, 0–10 mA (active/passive)
Digital: 2 open collectors, 1 solid-state relay
Digital Input: 5–30 V DC for totalizer reset
Datalogger: Internal 2 MB (~130,000 log entries)

Performance & Environmental

Size/Flow Range: 1–60 in. (25–1500 mm); 13.2–24,381 gpm (60–110,840 l/min)
Operating Temperature: Electronics –4°F to 140°F (–20°C to 60°C); Liquid 20–140°F (–7°C to 60°C)
Accuracy: Depends on sensor/device (e.g., DL 10 ultrasonic: 0.125 in.)
Pressure Range: Up to 30 PSI (2 bar)