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...
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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 board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny 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 (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- 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 is when a sensor or instrument adjusts its readings to reduce errors caused by changes in temperature. This matters because a sensor's raw output often drifts as conditions warm or cool, so compensation keeps readings more consistent and accurate over time.
- 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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lps35hw water resistant pressure sensor
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introducing adafruit stemma qt
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Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
