Matek Digital Airspeed Sensor ASPD 4525

The Matek ASPD-4525 airspeed sensor is a high-precision digital solution for measuring differential pressure and calculating airspeed in UAVs, FPV drones, and RC models. Manufacturer: Matek. At the heart of the module is the 4525DO digital pressure sensor from Measurement Specialties, which provides stable readings in the range of ±1 PSI with an accuracy of up to ±1.5%. Thanks to the digital I2C interface, information is transmitted directly to the autopilot — compatibility is confirmed with ArduPilot, PX4, and other I2C-enabled controllers.

Description and Design

The board has compact dimensions of 22 mm x 18 mm and a minimal weight of about 5 g, allowing for easy integration into the aircraft's design without noticeable impact on aerodynamics. The kit includes a plastic pitot tube and a silicone tube for reliable and convenient connection. A cable with a GH1.25 4pin connector is used for power and data transmission, facilitating connection to standard BECs — the module supports supply voltages from 4 to 10 V (can be powered by 5V or 6V BEC).

Technical Specifications:

• Pressure Sensor: 4525DO (Measurement Specialties)
• Pressure Range: ±1 PSI (differential pressure)
• Accuracy: up to ±1.5%
• Communication Interface: I2C (up to 400 kHz)
• Supply Voltage: 4–10 V (supports 5V or 6V BEC)
• Current Consumption: 5 mA
• Measurement Resolution: 14-bit
• Update Rate: up to 70 Hz
• Board Dimensions: 22 mm x 18 mm
• Weight: approximately 5 g
• Connector: GH1.25 4pin
• Temperature Compensation: built-in
• Compatibility: ArduPilot, PX4, and other autopilots with I2C airspeed sensor support

Package Contents:

• ASPD-4525 sensor board
• Plastic pitot tube
• Silicone tube
• Cable with GH1.25 connector (4pin)

Applications:

• FPV drones and model aircraft
• Unmanned aerial vehicles with autopilot
• Flight stabilization systems
• Dynamic airspeed calculation
• High-precision mission planning

The ASPD-4525 from Matek is ideal for projects requiring precise and rapid airspeed measurements: from stabilization and autopiloting to measuring instantaneous speed changes and maintaining course in complex flight conditions. The built-in filter reduces signal noise, enhancing reading stability, while an update rate of up to 70 Hz ensures timely data transmission for flight controllers and telemetry. Clear digital data transmission via I2C makes integration simple and compatible with modern avionics. Low power consumption (about 5 mA) and a wide power supply range allow the sensor to be used on various platforms without additional voltage converters. Compact dimensions (22×18 mm) and a mass of ~5 g enable the sensor to be installed even on small quadcopters and aircraft, preserving the platform's balance and aerodynamic characteristics.

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