Open Channel Flow Meter Box for Small Irrigation Canals

Key Features

Integrated Measuring Box Design: Combines a flow measuring structure with ultrasonic transit time flow measurement, making it suitable for standardized small canal monitoring.
Designed for Small Rectangular Channels: Suitable for rectangular open channels with a typical width or depth range of 40–160 cm.
Ultrasonic Transit Time Technology: Uses ultrasonic transit time measurement to calculate velocity and flow rate with stable performance in irrigation and drainage applications.
Wide Flow Velocity Range: Supports a flow velocity range of ±5 m/s, meeting the needs of low and medium flow open channel monitoring.
Radar Water Level Measurement: Equipped with a radar water level sensor for non contact level measurement and reliable flow calculation.
RS485 Modbus Output: Supports RS485 communication with Modbus protocol for integration with RTUs, telemetry terminals and IoT monitoring platforms.
IP68 Underwater Protection: The underwater components are rated IP68, suitable for long term field operation in water environments.
Low Power Operation: Supports 7–32 VDC power input and low average current consumption, suitable for solar powered remote stations.
Easy Installation and Commissioning: The integrated flow box structure simplifies installation and reduces the difficulty of on site channel modification.
Ideal for Irrigation Water Measurement: Suitable for agricultural irrigation districts, field canals, branch canals, farm water allocation and drainage monitoring.

Product Description

1. Description

JW-UT-C(HJ06) Open Channel Flow Meter Box is an ultrasonic transit time flow measurement solution designed for small rectangular irrigation canals, field channels, drainage outlets and agricultural water monitoring projects. It integrates a standardized measuring box structure with ultrasonic flow measurement, radar water level sensing, RS485 Modbus communication and IP68 underwater protection, helping users achieve accurate flow monitoring in compact open channel applications.

2. Product Overview

JW-UT-C(HJ06) Open Channel Flow Meter Box is designed for accurate water flow measurement in small irrigation canals and rectangular open channels. It is based on an ultrasonic transit time platform and uses a structured measuring box to create a stable measurement section. Compared with traditional open channel flow monitoring methods, this solution is easier to standardize in small canals and can improve measurement reliability in agricultural water allocation and drainage monitoring projects.

The system is especially suitable for irrigation districts where small field canals, farm canals and branch channels require continuous flow data. With radar water level measurement, ultrasonic velocity measurement and RS485 Modbus output, the flow meter box can be connected to RTUs, control cabinets, solar power systems and cloud based smart water platforms.

Parameter	Specification
Product Type	Ultrasonic transit time open channel flow meter box
Product Series	C type measuring box
Model Format	HJ-UT-Cxx
Applicable Channel Shape	Rectangular
Channel Width or Depth	40–160 cm
Installation Condition	Channel reconstruction or customized measuring section
Typical Applications	Irrigation field canals, farm canals, drainage outlets
Water Sediment Content	Up to 15 kg/m³
Flow Velocity Range	±5 m/s
Water Level Range	4–160 cm
Sedimentation Detection	Strong sedimentation detection up to ±25 cm
External Facilities	Power supply and control cabinet
Number of Acoustic Paths	Up to 32 customizable
Transducer Frequency	1 MHz
Water Level Sensor	Radar war level sensor
Built in RTU	Optional or unsupported depending on configuration
Data Output	RS485 Modbus protocol
Working Temperature	-25°C to 80°C
Storage Temperature	-40°C to 80°C
Working Voltage	7–32 VDC
Average Current	Less than 40 mA at 12 VDC
Peak Current	Less than 200 mA
Protection Rating	IP68 for underwater parts
Standard Reference	GB/T 11826.2-2012 and GB/T 15966-2017

3. Application Scenarios

Small Irrigation Canal Monitoring: Suitable for small rectangular irrigation canals where accurate flow measurement is required for water distribution, irrigation scheduling and water saving management.
Field Canal Flow Measurement: Designed for field canals and farm level water channels, helping irrigation managers monitor real time flow and cumulative water usage.
Agricultural Water Allocation: Supports water allocation projects in irrigation districts by providing measurable flow data for canal operation and water resource management.
Drainage Outlet Monitoring: Can be installed at drainage outlets to monitor discharge flow from agricultural fields, irrigation return water or small drainage channels.
Smart Water Conservancy Projects: Can be integrated with telemetry terminals, solar powered stations and cloud platforms for digital water conservancy and remote monitoring.
Rectangular Open Channel Measurement: Suitable for compact rectangular open channels where standard transducer installation may be difficult or where a controlled measuring section is preferred.

4. Installation and System Integration

The flow meter box is typically installed in a rectangular canal section or a reconstructed measuring section. The radar water level sensor is installed above the channel, while ultrasonic transducers are integrated into the measuring box or channel structure. The control unit can be placed in a nearby cabinet and connected to an RTU, solar power supply or cloud platform.

This design is especially useful when the site requires standardized installation, stable flow conditions and repeatable flow calculation in small canals.

FAQ

Q

1. What is an open channel flow meter box used for?

A

It is used to measure flow velocity, water level and flow rate in small rectangular irrigation canals, field canals, branch canals and drainage outlets.
Q

2. What channel size is suitable for this product?

A

The product is suitable for rectangular channels with a typical width or depth range of 40–160 cm.
Q

3. How does the flow meter box measure water flow?

A

It uses ultrasonic transit time technology to measure water velocity, combines radar water level data and calculates the flow rate based on the measuring box structure.
Q

4. Can JW-IoT integrate this flow meter box into a smart irrigation system?

A

Yes. JW-IoT can integrate the open channel flow meter box with RTUs, solar power systems, wireless gateways and cloud monitoring dashboards.
Q

5. Does this product support RS485 Modbus?

A

Yes. The product supports RS485 communication with Modbus protocol, making it easy to connect with industrial and IoT monitoring systems.
Q

6. Is the product suitable for outdoor field installation?

A

Yes. The underwater components are rated IP68, and the system is designed for long term use in irrigation and water conservancy field environments.
Q

7. What is the flow velocity range?

A

The flow velocity range is ±5 m/s, suitable for most small open channel and irrigation canal applications.
Q

8. Can JW-IoT provide a complete canal monitoring station?

A

Yes. JW-IoT can provide flow meter box selection, radar level sensor integration, RTU configuration, solar power design, control cabinet setup and cloud platform connection.
Q

9. What water level range does the system support?

A

The water level range is approximately 4–160 cm, suitable for compact rectangular channels and small irrigation canals.
Q

11. What makes this product different from a standard open channel flow meter?

A

Yes. It can be used for drainage outlets, agricultural return water, small drainage channels and environmental discharge monitoring.
Q

12. Why choose JW-IoT for open channel flow monitoring projects?

A

JW-IoT can support complete project delivery, including product selection, installation design, communication integration, data platform connection and long term smart water monitoring deployment.