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SDP810 Airspeed Sensor

ET-S43

SDP810 Airspeed Sensor

Differential-pressure airspeed sensor with pitot kit

AED 89.00

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Download datasheet (PDF)

OverviewKey featuresSpecificationsPerformancePinout

Overview

Differential-pressure airspeed sensor with pitot kit

The ET-S43 is built around the Sensirion SDP810-500Pa — digital differential pressure ±500Pa, temperature compensated, factory calibrated, no zero drift. It connects over I²C 0x25 and is powered from VIN 2.7–5.5V direct (no LDO/shifter needed).

Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.

Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.

Good for

  • Fixed-wing drone airspeed
  • Duct and HVAC airflow
  • Wind-tunnel experiments

Key features

What makes it different

Sensor

Sensirion SDP810-500Pa: digital differential pressure ±500Pa, temperature compensated, factory calibrated, no zero drift

Airspeed

±500Pa ≈ 0–28 m/s (≈100 km/h) at sea level. 125Pa variant for slow flight/HVAC

Interface

I2C 0x25

Supply

VIN 2.7–5.5V direct (no LDO/shifter needed)

Qwiic / STEMMA QT

Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.

Open documentation

Schematic, BOM and layout notes published for every board.

Specifications

Technical specifications

Device
SensorSensirion SDP810-500Pa: digital differential pressure ±500Pa, temperature compensated, factory calibrated, no zero drift
Airspeed±500Pa ≈ 0–28 m/s (≈100 km/h) at sea level. 125Pa variant for slow flight/HVAC
InterfaceI2C 0x25
SupplyVIN 2.7–5.5V direct (no LDO/shifter needed)
Board
Size38.1 × 25.4 mm
Mounting4 × M2.5 holes, 2.54 mm from each corner
Connectors2 × Qwiic / STEMMA QT (JST SH 4-pin) · 4-pin 2.54 mm header
Main ICSDP810-500PA-D (LCSC C153056)
RevisionRev B
Software
LibrariesSensirion arduino-i2c-sdp, ArduPilot ARSPD_TYPE=SDP3X driver (SDP8xx compatible), PX4 sdp3x driver
Solder jumpers
JP1 (default Closed)Cut to turn off the LED
JP2 (default Closed)Cut to remove the host-side I2C pull-ups

Performance

Pressure vs airspeed

Differential pressure at airspeedPitot formula ΔP = ½ρv², air density 1.225 kg/m³ (sea level, 15 °C). The 500 Pa range covers up to about 28 m/s.

Pinout

Pin map and connections

SDP810 Airspeed Sensor pinout: VIN, GND, SCL, SDA
PinNameTypeFunction
1VINPowerSensor supply = host logic level
2GNDGroundGround
3SCLI²CI²C clock
4SDAI²CI²C data

Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors). I²C pull-ups (10 kΩ) are on the board; cut JP2 to remove them.

Mechanical

Dimensions and what's in the box

Board 38.1 × 25.4 mm with M2.5 holes
Top view · 38.1 × 25.4 mm

In the box

  • 1 × ET-S43 SDP810 Airspeed Sensor (assembled)
  • 1 × 4-pin 2.54 mm male header, unsoldered

Getting started

  • Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
  • Libraries: Sensirion arduino-i2c-sdp, ArduPilot ARSPD_TYPE=SDP3X driver (SDP8xx compatible), PX4 sdp3x driver
  • Run an I²C scanner to confirm the address: 0x25

Compare

Which navigation board?

SDP810 Airspeed Sensor (this board)This boardET-S41 MAX-M10S Multi-GNSS ReceiverET-S42 ZED-F9P RTK GNSS
What it doesDifferential-pressure airspeed sensor with pitot kitGPS, Galileo, BeiDou and GLONASS with backup batteryMulti-band RTK GNSS, centimetre-level
InterfaceI²C 0x25I²C (DDC) 0x42 via Qwiic and UART on the header,…—
Best forFixed-wing drone airspeedDrone and rover navigationRTK drones and rovers
Price89 AED89 AED829 AED

Downloads

Documents and design files

PDFET-S43 schematicRev BLCSCSDP810-500PA-D datasheet and stockC153056
STEP3D modelComing soon

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