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Electromagnetic Open-Channel Flow Measuring Box

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Product Description

The electromagnetic open-channel flow measuring box is a high-precision flow measuring device based on Faraday's law of electromagnetic induction. Using contact measurement, the sensor directly contacts the water body and precisely calculates the average flow velocity by measuring the induced electromotive force generated as water cuts the magnetic field lines, unaffected by water turbidity, floating objects or temperature changes, with extremely high measurement accuracy and stability. It integrates signal processing, data computation and wireless communication modules, simultaneously collecting velocity and water level data and automatically converting them into instantaneous and cumulative flow. With a fully sealed waterproof structure and low-power design, it supports mains and solar power supply and realises remote data transmission via 4G/NB-IOT, and is especially suitable for water with high silt content.

• Bidirectional flow measurement

• High measurement accuracy

• Wide water quality applicability

• Multiple communication methods

• Corrosion-resistant material

• Convenient installation and maintenance

• Customizable; an optional silt removal assembly is available.

• Measurement of water level, average flow velocity and cumulative flow.

• Multi-electrode automatic tracking with an advanced mathematical model, for accurate velocity measurement of different cross-section forms.

• Wide measuring range of 0.01—10 m/s and bidirectional flow measurement.

• Measurement unaffected by floating objects, silt content, water level changes and temperature.

• Direct installation on standard sections without modification, with low construction difficulty and cost.

• Standard MODBUS (RTU) 485 output and dual analogue input; permanent data storage of settings and flow values after long power failure.

parameter

specifications

Material

Stainless steel, aluminium profile

Max. cumulative flow

9999999999

Dimensions

200~2000

Max. instantaneous flow

10000

Accuracy

Water level 2mm, velocity 0.5%, system ≤2.5%

Max. displayed velocity

19.999

Measuring range

Velocity 0.01—10m/s

Max. displayed level

19.999

Power supply

3.6V/12V/24V/220V etc. (multiple options)

Protection class

IP65

Signal cable

10 m as standard (customizable)

Velocity sensor

Faraday's law of electromagnetic induction

Communication

RS485 MODBUS (RTU) protocol

Level sensor

Pressure, ultrasonic, radar, etc.

Power consumption

<5W

Optional accessories

Solar power supply, bracket, communication module, etc.

Note: Optional accessories include solar power supply system, bracket, bracket embedded part, stainless steel instrument box, battery buried box communication module, pressure sensor, ultrasonic sensor, radar sensor, etc.



- FAQ -

A:

A: We are the manufacturer—our 7,800 m² production facility in Shandong, China is owned and operated by us, with in-house R&D, precision assembly lines, and a dedicated pre-shipment testing bay. Founded in 2007, we now export to 20+ countries. We welcome third-party factory audits (SGS, BV, TÜV) and can arrange a live video tour or an on-site visit before you place your first order.

A:

faq1hA: Yes. Every fertigation system can be built to your local grid standard — 110V / 220V / 380V / 480V, 50Hz or 60Hz — with matching plug types, cable specifications, and IP-rated control cabinets. The HMI software supports multi-language interfaces, and we can implement custom communication protocols (4G / LoRa) and full OEM branding. Fill in the electrical specification sheet we provide, and we will confirm the design in writing before production starts.

A:

A: We are a one-stop solution provider, not a single-machine supplier. Beyond standalone fertigation units, we deliver complete turnkey packages—intake pump stations, automatic back-flush filtration systems, field solenoid valves and decoders, pipelines, and fittings—together with control programming and as-built drawings. Send us your field layout, water source data, and crop type, and our engineers will return a tailored design, BOM, and quotation within three working days.

A:

A: To quote accurately, we need five things: (1) crop type and planting area or greenhouse size; (2) water source (well, river, or reservoir) and a water quality report, if available; (3) field topography and layout—a simple sketch or satellite map is fine; (4) your local voltage and frequency; (5) project stage and target delivery date. Send these to [email / WhatsApp] and our engineers will reply with a tailored design, BOM, and quotation within 3 working days.

A:

A: We usually quote FOB Qingdao, with CIF and DDP available on request. Main loading ports include Qingdao, Shanghai, and Ningbo, and we will recommend the most economical option for your destination. To get a freight estimate, simply tell us your destination port or door address, the order quantity, and whether you prefer LCL or FCL—we will come back with a full landed-cost breakdown.

A:

A: Every machine carries a 12-month warranty against manufacturing defects, with free replacement parts shipped by air. The warranty starts from the shipping date or as otherwise agreed in the contract. Overseas support includes full English manuals, wiring schematics, and operation videos, plus remote video commissioning via WhatsApp / Zoom with a response time within 12 working hours. Spare parts remain available for 2 years, and field engineers can be dispatched for large projects by agreement.

A:

A: All export equipment is packed in ISPM 15-compliant fumigation-free wooden crates or heavy-duty plywood pallets, lined with multi-layer waterproof film and shock-absorbing cushioning to protect meters, sensors, and electrical components from ocean humidity and rough transit. Before shipment, we share the container loading plan plus photos and videos of the packed goods for your confirmation. Custom shipping marks and labels are available, and we can quote FOB, CIF, or DDP terms.

A:

A: MOQ is 1 set for standard models—ideal for sample testing and pilot projects. Lead time starts from receipt of deposit and confirmed drawings: 7–15 working days for standard models, 20–35 working days for customized or large project orders. In peak season, we recommend placing orders 4–6 weeks in advance, while stock models can often ship faster. Both LCL and full-container loading can be arranged.

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