Adafruit
Adafruit LPS33HW Water Resistant Pressure Sensor - STEMMA QT
The Adafruit LPS33HW is a water-resistant barometric pressure sensor designed for use in harsh environments. The sensing element is housed in a ceramic packa...
The Adafruit LPS33HW is a water-resistant barometric pressure sensor designed for use in harsh environments. The sensing element is housed in a ceramic package with waterproof gel protection, making it suitable for long-term exposure to water, chlorine, bromine, commercial detergents, fuels, solvents, and other chemicals.
With 24-bit pressure data and 16-bit temperature readings, the LPS33HW delivers ±0.1% hPa accuracy across a 260–1260 hPa range (capable of withstanding up to 20× its measurement range). The ported sensor design includes a metal port with a lip for O-ring installation, allowing sealed pressure measurement setups.
Key Features
- Water & Chemical Resistant – Ceramic package with waterproof gel, proven against chlorine, fuels, solvents, and detergents
- 24-Bit Pressure Data – ±0.1% hPa accuracy from 260 to 1260 hPa
- 16-Bit Temperature Data – Onboard temperature compensation for stable readings
- Ported Sensor Design – Metal port with lip for O-ring installation
- Adjustable Data Rate & Low-Pass Filter – Tune measurement speed and remove signal noise
- Pressure Tolerance – Withstands up to 20× the measurement range
- I2C and SPI – I2C via STEMMA QT/Qwiic connectors; SPI supported in Arduino
- 3.3 V and 5 V Compatible – Onboard voltage regulator and level shifting
Ideal For
- Wet or chemically harsh environments
- Sealed pressure measurement systems with O-ring and tubing
- Weather stations and barometric monitoring
- Industrial and scientific pressure sensing
Package Contents
- 1× Adafruit LPS33HW Water Resistant Pressure Sensor Breakout (STEMMA QT)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
- Temperature compensation
- Temperature compensation means the sensor adjusts its readings to reduce errors caused by changes in water temperature. This matters for field monitoring because ponds, rivers, and tanks can vary in temperature throughout the day and across seasons.
- Tolerance
- Tolerance tells you how far the real resistance value may be from the printed value. A 1% resistor is useful when a circuit needs more predictable behaviour than a looser 5% or 10% part.
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