TFPITOT01 - Lightweight Pitot Tube with Integrated Differential Pressure Sensor

TFPITOT01 side view

The TFPITOT01 is an ultra-lightweight pitot tube that integrates the SDP33 sensor, providing a compact and reliable airspeed measurement solution. This design eliminates common issues associated with traditional low-cost pitot tubes, including temperature drift, offset, and the failure of tubing systems.

Key Features

  • Compact Design – Eliminates external tubing, reducing weight and enhancing reliability.
  • Stable Measurements – No temperature drift or offset, ensuring high accuracy in various conditions.
  • High Moisture Resistance – Designed to handle condensation and humidity, maintaining performance in challenging environments.
  • PX4 & Ardupilot Compatibility – Seamless integration with popular flight control software for UAV applications.

Technical Specifications

  • Sensor Type: Sensirion SDP33
  • Measurement Range: ±1500 Pa (1 m/s to 50 m/s)
  • Accuracy: ±3% of measured value (corresponds to ±1.5 m/s @ 50 m/s)
  • Zero Point Accuracy: 0.2 Pa
  • Operating Temperature Range: -40 °C to +85 °C
  • Dimensions: 45 mm length, 6 mm diameter
  • Weight: 3 grams
  • Default I2C Address: 0x21 (configurable to 0x22 or 0x23)

Applications

The TFPITOT01 is designed for use in Unmanned Aerial Vehicles (UAVs), providing precise airspeed measurements for atmospheric monitoring, navigation, and performance optimization.

Installation Guide

Mounting Instructions

To ensure reliable airspeed measurements, the pitot tube must be installed correctly:

  1. The tube must be parallel to the airflow to guarantee accurate readings.
  2. Mounting possibilities:
    • Clamp Mounting: Use a dedicated bracket or clamp to secure the tube.
    • Adhesive Bonding: Bond the tube into a pre-fabricated socket or flange on the fuselage or wing structure.
  3. Ensure that the electronic components and I2C cable are sealed against moisture. Only the intake holes at the front of the pitot tube should be exposed to airflow.

Electrical Connection

  • Connect the TFPITOT01 to an unused I2C port on the flight controller.
  • Configure the firmware settings to recognize the sdp3x sensor driver for airspeed measurements.

Calibration

Follow the calibration procedure as outlined in the documentation for your flight control firmware (PX4/Ardupilot) to achieve optimal accuracy.

Availability and Customization

The TFPITOT01 is available from ThunderFly s.r.o..

  • For commercial inquiries, contact sale@thunderfly.cz.
  • Orders can be placed via our Tindie store.
  • Customization options, including length or diameter modifications, are available upon request (typical lead time: 3 weeks).