MEMS pressure sensor designed for industrial applications

Protected by a viscous potting gel inside the cylindrical metal package, the IPx8-rated LPS33W withstands salt water, chlorine, bromine, detergents such as hand soap and shampoo, e-liquids, and light industrial chemicals such as n-pentane.

The package lid provides high corrosion resistance, and the cylindrical form factor is easy to use with o-rings in applications that require a sealed enclosure.

The properties of ST’s proprietary gel formula, together with the sensor’s built-in signal-conditioning ASIC, ensure class-leading 0.008hPa RMS pressure noise thereby allowing outstanding measurement resolution.

Susceptibility to reflow-soldering stress during assembly is also extremely low, drifting less than ±2hPa and recovering normal accuracy in 72 hours; more than twice the speed of other sensors. Temperature compensation keeps accuracy within ±3hPa over the operating range from 0°C to 65°C.

The LPS33W operates at just 15µA in high performance mode, with a 3µA low power mode and 1µA power-down to help maximise runtime of battery-powered devices. A 128-bit FIFO stores up to 40 slots of 32-bit pressure and temperature data, helping save extra power by minimising intervention from the host microcontroller. A low pass filter and I2C and SPI digital interfaces are also built-in.