Open Channel Flow Meter for Smart Drainage Monitoring

Key Features

Non-contact radar measurement: The sensor does not touch the water surface, reducing maintenance risks in open channels, sewage outlets, and harsh outdoor environments.
Integrated water level and flow monitoring: Combines radar water level measurement and open channel flow calculation for continuous real-time monitoring.
High measurement accuracy: Supports high-precision level measurement with ±2 mm and ±0.05% FS accuracy and 0.1 mm resolution.
Multiple measuring ranges available: Measurement ranges include 2 m 7 m and 15 m, suitable for small channels, drainage systems, and open channel flow monitoring projects.
Low-power battery operation: Built-in rechargeable lithium battery supports long-term field deployment, with maximum working duration up to 5 years depending on reporting interval and site conditions.
Wireless data transmission: Supports 4G NB-IoT and LoRa communication options for remote data upload and unattended monitoring stations.
Bluetooth mobile app configuration: Built-in low-power Bluetooth allows on-site parameter setting and debugging through a mobile app without wiring or laptop connection.
IP68 waterproof protection: Fully sealed waterproof design is suitable for submerged vapor, rain, splashing water, and long-term outdoor environments.
Compact and lightweight structure: Small size and integrated design make installation easier on bridges, channel walls, drainage outlets, brackets, and monitoring poles.
Multiple protocol support: Supports SL651 SZY206 MQTT HJ212 HTTP and customized protocols for integration with hydrology platforms and IoT systems.
Remote maintenance and upgrade: Supports wireless remote parameter configuration, data management, and system maintenance for distributed monitoring networks.
Suitable for harsh monitoring sites: Applicable to water conservancy, agriculture, environmental protection, industrial wastewater, urban drainage, and pipe outlet monitoring.

Product Description

1. Description

JW-RD-306(HJ04) Open Channel Flow Meter is a compact non-contact radar flow monitoring device designed for open channels, drainage outlets, water conservancy projects, industrial discharge points, and hydrological monitoring stations. It integrates radar water level measurement, flow calculation, RTU data transmission, Bluetooth configuration, and low-power operation in one device. With IP68 waterproof protection, wireless communication, and long battery life, it is suitable for remote outdoor flow monitoring and smart drainage applications.

2. Product Overview

JW-RD-306(HJ04) Open Channel Flow Meter is an integrated non-contact radar device for measuring water level and calculating flow in open channels. It is designed for sites where conventional contact sensors are difficult to install or maintain, such as drainage outlets, irrigation channels, culverts, industrial discharge points, and water conservancy monitoring stations.

The device integrates radar sensing, RTU communication, Bluetooth setup, and low-power operation into a compact waterproof housing. It can collect water level data and transmit monitoring results to a cloud platform or water management system through wireless communication. Its non-contact design helps avoid problems caused by sediment, floating debris, corrosion, sewage, or high-flow water conditions.

For projects requiring unattended operation, the built-in battery and wireless communication options reduce construction complexity and make the device suitable for remote field deployment.

Item	Specification
Product Type	Integrated Radar Open Channel Flow Meter
Measuring Range	2 m 7 m 15 m
Measurement Accuracy	±2 mm ±0.05% FS
Resolution	0.1 mm
Blind Zone	Greater than 10 cm
Radar Frequency	60 GHz or 80 GHz
Protection Rating	IP68
Radar Antenna	Flat microstrip array radar antenna
Beam Angle	8°
Upload Interval	1 minute to 24 hours configurable
Battery	Rechargeable lithium battery
Average Current	≤10 mA
Sleep Current	≤0.1 mA
Working Duration	Up to 5 years depending on reporting interval
Storage Temperature	-40°C to 80°C
Operating Temperature	-30°C to 70°C
Wireless Communication	4G NB-IoT LoRa
Transmit Power	≤24 dBm
Receiver Sensitivity	-110 dBm
SIM Card	Built-in
Antenna	Built-in or external optional
Wireless Protocols	SL651 SZY206 MQTT HJ212 HTTP
Bluetooth Standard	Bluetooth 4.2 or above
Bluetooth Transmit Power	+8 dBm
Bluetooth Receiver Sensitivity	-95 dBm at 0.1% BER
Housing Color	Blue
Housing Material	Waterproof ASA
Product Size	146.5 × 146.5 × 188.5 mm

3. Application Scenarios

Open Channel Flow Monitoring: Drainage flow data can help identify reduced discharge capacity, channel overload, and rapid runoff changes during heavy rainfall. When combined with rainfall, water level, and warning devices, the meter supports an integrated urban flood early warning system.
Urban Drainage and Waterlogging Monitoring: Suitable for drainage outlets, underground channels, urban culverts, low-lying areas, and stormwater systems where early warning and real-time monitoring are required.
Industrial Wastewater Outlet Monitoring: Applicable to industrial discharge outlets, environmental monitoring points, and enterprise wastewater supervision systems where non-contact measurement reduces maintenance difficulty.
Hydrology and Water Conservancy Monitoring: Can be used for hydrological stations, small rivers, reservoirs, sluice gates, and water resource projects to support long-term data collection and management.
Agricultural Irrigation Monitoring: Suitable for irrigation canals and farmland water distribution systems, helping improve irrigation scheduling and water use efficiency.

FAQ

Q

1. What is this open channel flow meter used for?

A

This open channel flow meter is used for non-contact flow monitoring in open channels, drainage outlets, irrigation canals, urban stormwater systems, industrial wastewater outlets, and hydrological monitoring stations.
Q

2. Does the device need to touch the water?

A

No. The device uses non-contact radar measurement, so it does not need to touch the water surface. This helps reduce maintenance in sewage, sediment-heavy water, and harsh outdoor environments.
Q

3. What measuring ranges are available?

A

The device supports 2 m 7 m and 15 m measuring ranges, making it suitable for small and medium open channel monitoring applications.
Q

4. Can it be used outdoors for long-term monitoring?

A

Yes. The IP68 waterproof design, low-power operation, and rugged ASA housing make it suitable for long-term outdoor deployment.
Q

5. Does JW-IoT provide a complete open channel flow monitoring solution?

A

Yes. JW-IoT can provide the open channel flow meter, wireless data transmission, cloud platform integration, solar or battery power options, and monitoring dashboard configuration for smart water projects.
Q

6. What wireless communication methods are supported?

A

The device supports 4G NB-IoT and LoRa communication options for remote data transmission.
Q

7. Can parameters be configured on-site?

A

Yes. Built-in Bluetooth allows users to configure parameters, check device status, and perform debugging through a mobile app.
Q

8. Is this flow meter suitable for urban drainage monitoring?

A

Yes. It is suitable for urban drainage channels, culverts, stormwater outlets, low-lying areas, and waterlogging monitoring points.
Q

9. Can JW-IoT integrate this device with an existing platform?

A

Yes. JW-IoT can support platform integration through SL651 SZY206 MQTT HJ212 HTTP and customized communication protocols.
Q

10. What is the main advantage compared with contact-type flow meters?

A

The main advantage is non-contact measurement. It avoids direct contact with water, reducing sensor fouling, corrosion, blockage, and maintenance frequency.
Q

11. Can it be used for industrial wastewater monitoring?

A

Yes. It is suitable for industrial wastewater outlets, enterprise discharge supervision, environmental monitoring points, and pipe outlet flow monitoring.
Q

12. Does JW-IoT support customized project deployment?

A

Yes. JW-IoT can support customized installation brackets, communication protocol adaptation, cloud platform connection, and project-based monitoring solutions for water conservancy, drainage, and environmental applications.