TFPITOT01: Lightweight Compact Pitot-tube Sensor

Precise Airspeed Measurement for UAVs Without the Hassle of Tubing

The TFPITOT01 is a lightweight and compact pitot tube solution designed for Unmanned Aerial Vehicles (UAVs). It integrates the Sensirion SDP33 differential pressure sensor, eliminating the need for external tubing and reducing common issues like temperature drift and sensor offset. Its rain-resistant construction ensures reliable airspeed measurements even in challenging environmental conditions.

Why This Pitot Tube?

Traditional low-cost pitot sensors require complex external tubing, which introduces reliability issues, weight concerns, and risks of clogging or leaks. The TFPITOT01 solves these problems by integrating the sensor directly into the Pitot tube, providing plug-and-play airspeed measurement with high precision and stability. It is fully compatible with PX4 and Ardupilot, making it an excellent choice for UAV developers and drone users.

Key Features

• Integrated SDP33 Sensor – Eliminates external tubing and ensures stable, accurate airspeed readings.
• Temperature-Compensated – No drift or offset, maintaining precision in varying conditions.
• Moisture-Resistant Design – Can handle high humidity and condensation without performance degradation.
• Compact & Lightweight – Weighs only 3 grams, with a 45mm tube length and 6mm diameter.
• I2C Interface – Easy integration with flight controllers via standard I2C communication.
• Configurable I2C Address – Default 0x21, adjustable to 0x22 or 0x23 as needed.
• Wide Operating Range – Supports -40 °C to +85 °C, covering extreme temperature conditions.

Technical Specifications

• Sensor Type: Sensirion SDP33
• Measurement Range: ±1500 Pa (1 m/s to 50 m/s)
• Accuracy: ±3% of measured value (±1.5 m/s @ 50 m/s)
• Zero Point Accuracy: 0.2 Pa
• Dimensions: 45mm tube length, 6mm diameter
• Weight: 3 grams
• Interface: Pixhawk I2C (3.3V logic level)

Installation & Usage

The TFPITOT01 must be installed parallel to the airflow for accurate readings. It can be mounted using:

• Clamp Mounting – Secure the tube using a bracket or clamp.
• Adhesive Bonding – Attach the tube to the aircraft structure using a pre-fabricated socket.

To prevent moisture ingress, ensure the electronics and I2C cable are properly sealed. The sensor should only be exposed to the atmosphere at the front intake holes.

I2C cables

You may need to purchase additional I2C cables separately. We offer high-quality cables that are compatible with the Pixhawk standard and with a ThunderFly color scheme for easy signal type identification. ThunderFly cables are specifically designed with improved resistance to electromagnetic interference and a silicone insulator that makes them highly flexible.

• TFCAB15I2C01 Buy at Tindie

Use of multiple TFPITOT01 sensors

In applications where multiple TFPITOT01 are needed, the TFI2CADT01 module could be used. That allows the connection of up to six airspeed sensors to a single I2C port.

Customization & Availability

For commercial inquiries or custom modifications (length/diameter changes), contact sale@thunderfly.cz. Custom requests typically have a 3-week lead time.

Who Is It For?

• UAV designers looking for a lightweight and reliable airspeed sensor.
• RC enthusiasts who need precise, tubing-free airspeed measurement.
• Engineers working on atmospheric monitoring or aerodynamic optimization for small aircraft.

With the TFPITOT01, you get accurate, robust, and plug-and-play airspeed measurement without the complexities of traditional pitot tube setups.

The package includes:

• TFPITOT01 with mounted pitot tube
• (Optionally) ThunderFly I2C silicone cable (TFCABxxI2C01)