The Adafruit LPS35HW is a water-resistant barometric pressure and temperature sensor from ST. The sensing element is housed in a ceramic package with waterproof gel protection, making it safe to use in damp and humid environments like outdoor weather stations.

With 24-bit pressure data and 16-bit temperature readings, the LPS35HW delivers ±0.1% hPa accuracy across a 260–1260 hPa range. Unlike the ported LPS33HW variant, this non-ported model is designed for general wet-environment use. It can withstand up to 20× its measurement range and features adjustable data rates with a built-in low-pass filter for clean readings.

Key Features

• Water Resistant Sensor – Ceramic package with waterproof gel for use in damp and humid conditions
• 24-Bit Pressure Data – ±0.1% hPa accuracy from 260 to 1260 hPa
• 16-Bit Temperature Data – Onboard temperature compensation for stable readings
• 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 for easy wiring; SPI supported in Arduino
• 3.3 V and 5 V Compatible – Onboard voltage regulator and level shifting

Ideal For

• Outdoor weather stations in wet or humid conditions
• Barometric pressure and altitude monitoring
• High-humidity environmental sensing
• IoT sensor nodes exposed to moisture

Package Contents

• 1× Adafruit LPS35HW Water Resistant Pressure Sensor Breakout
• 1× Strip of header pins

Resources

• LPS35HW Guide – Arduino & CircuitPython