VK FL-2 — Dual-Channel Paddle Wheel Flow Meter

The VK FL-2 is a professional dual-channel flow meter designed for agricultural UAVs, spraying drones, and precision agriculture applications.

Featuring a paddle-wheel measurement system, independent PWM outputs, and IP67 protection, the FL-2 provides reliable liquid flow monitoring for agricultural spraying systems.

With a measurement range of 5–60 L/min, ±5% accuracy, and a lightweight 125 g design, the FL-2 is ideal for agricultural drones equipped with dual-pump spraying systems.

Key Features

Dual-Channel Flow Measurement

Measures liquid flow across two independent pipelines, making it suitable for dual-pump agricultural spraying systems.

5–60 L/min Measurement Range

Supports a wide range of agricultural spraying applications requiring continuous liquid flow monitoring.

±5% Measurement Accuracy

Provides flow measurements with a published accuracy of ±5%.

Independent PWM Outputs

Features two PWM signal outputs for integration with compatible agricultural flight controllers.

IP67 Waterproof Protection

Designed for agricultural environments exposed to dust, moisture, and liquid splashes.

Quick-Release Maintenance Design

Allows easy access to the internal paddle-wheel mechanism for cleaning and maintenance.

Flexible Installation

Supports vertical and horizontal installation configurations.

Dual-Channel Flow Monitoring

The VK FL-2 is designed to monitor two separate liquid circuits simultaneously.

Each channel provides an independent flow measurement signal, allowing compatible agricultural flight controllers to monitor liquid distribution.

This configuration is particularly useful for drones equipped with dual-pump spraying systems.

Paddle-Wheel Measurement Technology

The FL-2 uses a paddle-wheel mechanism to measure liquid flow.

As liquid passes through the sensor, the internal impeller rotates and generates a measurement signal corresponding to the flow rate.

The system provides a practical and cost-effective alternative to more complex flow measurement technologies.

Precision Agricultural Spraying

Accurate liquid flow monitoring is essential for agricultural UAV operations.

The FL-2 provides flow information that can support:

• Agricultural spraying
• Liquid fertilizer distribution
• Crop protection
• Dual-pump spraying systems
• Automated flow monitoring

When connected to a compatible flight controller, flow information can contribute to spray-rate management.

Independent PWM Communication

The FL-2 features two independent PWM signal outputs.

PWM1: First flow measurement channel

PWM2: Second flow measurement channel

This allows compatible agricultural control systems to receive separate flow measurements from each liquid circuit.

Quick-Release Maintenance

The FL-2 features a quick-disassembly structure designed to simplify maintenance.

The sensor cover can be removed to access the paddle-wheel mechanism for cleaning.

This is particularly useful in agricultural applications where spraying liquids may leave residues inside the sensor.

IP67 Protection

The FL-2 features an IP67-rated enclosure designed for demanding agricultural environments.

This provides protection against dust ingress and temporary immersion under the conditions specified by the IP67 standard.

Compact & Lightweight Design

With a weight of approximately 125 g, the FL-2 is suitable for integration into agricultural UAV spraying systems.

Its compact structure allows installation in different liquid distribution configurations.

The module supports both vertical and horizontal mounting.

Technical Specifications

Product: VK FL-2

Brand: VK

Product Type: Dual-Channel Paddle Wheel Flow Meter

Primary Application: Agricultural UAV Spraying Systems

Measurement Technology: Paddle-Wheel Flow Sensor

Number of Channels: 2

Flow Measurement Range: 5–60 L/min

Measurement Accuracy: ±5%

Signal Output: PWM

Output Channels: PWM1 / PWM2

Operating Voltage: 5 V DC

Inlet / Outlet Interface: 9 × 13 mm

Compatible Hose Size: 12 × 14 mm

Protection Rating: IP67

Installation Orientation: Vertical / Horizontal

Flow Direction: Forward / Reverse Configuration

Weight: Approximately 125 g

Applications: Agricultural Spraying / Liquid Flow Monitoring / Dual-Pump Systems

Wiring Configuration

White Wire: PWM1 — Flow Channel 1

Orange Wire: PWM2 — Flow Channel 2

Red Wire: +5 V Power Supply

Black Wire: Ground (GND)

Verify the wiring configuration against the supplied manufacturer’s documentation before installation.

What’s Included

1× VK FL-2 Dual-Channel Flow Meter

Connection cables, hose fittings, and mounting accessories depend on the selected commercial package.

Flight controller, spraying pumps, liquid tank, and other agricultural UAV components are not included unless explicitly specified.

The flow meter requires a compatible agricultural flight controller or monitoring system to process its measurement signals.

Measurement accuracy depends on installation, liquid characteristics, and system calibration.

Clean the internal paddle-wheel mechanism regularly to maintain reliable measurements.