Sensor applications

Precise Flow Monitoring for Drones

Lightweight - Compact design weighing under 50g.
High accuracy - Better than 1%.
Fuel-Adaptive – Compatible with and precisely calibrated for all fuel types.
Robustness & Dynamic behaviour – High vibrations & Pulsating flow.

Drones and flowmeters

Applications
Lightweight Design
Real-Time Transmission of Critical Data
Accurate when it matters the
Fuel Compatibility
Harsh Conditions Compatible
Combustion/ Loaded Fluids Processing

Why integrate flowmeters in drones?

Applications

When every second counts, gas-powered drones can fly farther, carry more, and excel in extreme conditions. Equipped with advanced internal combustion engines and intelligent
sensors, they're essential for emergency response, agriculture, security,
and delivery.

ALLENGRA’s flow meters weigh just 50 grams, need no maintenance, and reach ±0.5% accuracy — even under 20g accelerations or more and strong vibration. They enable real-time fuel tracking, improve payload distribution, and help ensure safe return by monitoring fuel from take-off to landing.

Emergency response and rescue service

Security and surveillance

Delivery

Agriculture and forestry

How Smart Sensors Boost UAV Performance?

Lightweight Design

When every gram matters

The flowmeter weighs under 50g, reducing system load for extended flight.
Universally compatible with multirotor, fixed-wing, and hybrid UAVs.
Quick-connect OD6/OD8 fittings ensure fast and secure installation.
Supports balanced fuel flow in multi-cylinder engine configurations.

Real-Time Transmission of Critical Data

Why monitor fuel injection systems?

Multiple Communication Interfaces: Compatible with CAN Bus, UART, ModBus, and I2C for easy integration.
Enables adaptive range calculations and “point-of-no return” awareness for long-range missions.
Improves engine efficiency by constantly keeping an eye on key fuel flow parameters.

Accurate when it matters the

Why is accuracy critical for fuel management?

Accuracy of ± 0.5% reading, even at low volumes Injectors can be sharp in labs, obtaining deviations of up to; 5 percent in real World flying
Supports multi-cylinder and return-line systems with balanced precision
Enables exact fuel use, reducing waste and ensuring safe landings
Precise dosing of fertilizer for irrigation and agriculture

Fuel Compatibility

Works with any gas, can be calibrated accordingly
Fuel Quality Management: Monitors fuel composition and impurities to ensure clean, consistent performance.
Fuel Mismatch Alert: Notifies when a different fuel type is detected than the one calibrated.
Air Bubble Handling: Continuous measurement despite air bubble presence.

Harsh Conditions Compatible

Accurate at any altitude with auto-adjustment for pressure and elevation.
Stable in harsh environments, including humidity and extreme heat or cold.
Immune to high vibrations and continuous mechanical stress.
Consistent readings regardless of sensor position or tilt.

Combustion/ Loaded Fluids Processing

Why manage more than just fuel?

Irrigation: Precise, low-pressure flow control for efficient water distribution over variable terrain
Pesticides: Accurate dosing regardless of viscosity, minimizing waste and protecting crops
Fire Drones: Reliable suppressant flow monitoring under thermal stress and dynamic flight conditions

Products

Allengra Micro Flow Meter 2nd Generation

Micro Flow Meter 2nd Gen

The 2nd generation micro flow meter is compact and precise, achieving ±1% accuracy in a lightweight <50grams design, with extended measuring range, push-in fitting connections, and state-of-the-art communication interfaces.  Compact and lightweight, it’s an ideal fit for small systems, needing compact solutions, such as Coffee Machines, Drinking Dispensers, Dosing Applications, UAVs , drone systems, marine applications, vehicles and others.

PUM Fuel Flow Meter

PUM Fuel Flow Meter

Ultrasonic fuel sensor: built for high-precision flow measurement (±0.5%). Engineered for harsh use, zero maintenance. Ideal for drones, bikes, motorsport, automotive. A proven choice for drone testing benches and development platforms, where accuracy and stability take priority over weight.