Holybro MS4525DO: Because 'Guesstimating' Speed is for Paper Planes

Listen, we know you’ve been flying by the seat of your pants, praying that your fixed-wing doesn't stall the moment you turn into a headwind. Welcome to the world of actual data. The Holybro Digital Airspeed Sensor is here to stop your flight controller from lying to you. It uses the MS4525DO sensor—which is a fancy way of saying it’s much better than that cheap analog thing you were looking at on that other site.

Why You Want It

Analog sensors are great if you enjoy signal noise, cable interference, and values that jump around like a toddler on a sugar rush. This digital I2C version sends clean, 14-bit data straight to your FC. It even measures temperature, because apparently, the air gets cranky when it's cold, affecting your true airspeed. It’s smarter than your average sensor, and definitely more reliable than your 'calibrated' thumb.

Technical Specs

• Sensor Model: MS4525DO-DS5AI001DP (Try saying that three times fast)
• Pressure Range: 1 psi differential (Roughly 100 m/s or 360 km/h for the speed demons)
• Resolution: 0.84 Pa (It can basically feel a butterfly sneeze)
• Data Conversion: 14-bit ADC (Smooth as a freshly paved runway)
• I2C Address: 0x28H (Don't let your other sensors bully it)
• Mounting: M3 / 6-32 holes (For people who actually secure their gear)

In the Box

Depending on which version you pick (because we like giving you choices you'll overthink):

• 1x Digital Air Speed Sensor (The brain)
• 1x Pitot Tube (PT40 or PT60, choose your fighter)
• 1x Rubber Tubing (40cm or 100cm of pure, bendy joy)
• 1x GH 4P Cable (To actually plug the thing in)

Compatibility

This kit plays nice with all Holybro Flight Controllers, Pixhawk units, and anything running ArduPilot or PX4. If you're trying to use this on a toaster, please send us the video footage, but it probably won't work.

Highlights

• Noise Immunity: Digital output means long cables won't ruin your day.
• True Airspeed: Integrated temperature sensing for the physics nerds who care about air density.
• Low Offset: Because starting your flight with a 10m/s reading while stationary is embarrassing.

Notes

Installation tip: Don't put the Pitot tube behind a propeller. I know it sounds obvious, but you’d be surprised how many 'pro' pilots try to measure prop-wash instead of airspeed. Keep it in clean air, keep the tubes kink-free, and your ArduPilot will love you for it.

Disclaimer

Installing this won't make you a better pilot, but it will give you more accurate data as you crash into that tree.

Still Here?

You’ve scrolled past the specs, the box contents, and my mediocre jokes. You clearly need this MS4525DO sensor for your next long-range FPV build or UAV project. Stop overthinking the 14-bit ADC resolution and just add it to your basket. Your Pixhawk is lonely. Give it some data.

#FPVUK #ArduPilot #PX4 #Holybro #AirspeedSensor