MEMS Pressure Sensor Is Water & Expense Resistant

STMicroelectronics’ LPS33W water-resistant MEMS pressure sensor combines chemical compatibility, stability, and accuracy for use in a wide range of applications such as fitness trackers and other wearables, vacuum cleaners, and general-purpose industrial sensing. Protected by a viscous potting gel inside the cylindrical metal package, the IPx8-rated component 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.

 

Properties of ST’s proprietary gel formula, together with the sensor’s built-in signal-conditioning ASIC, ensure 0.008hPa RMS pressure noise. Susceptibility to reflow-soldering stress during assembly drifts less than ±2hPa and recovers normal accuracy in 72 hours, allegedly more than twice the speed of other sensors. Temperature compensation keeps accuracy within ±3hPa over the operating range from 0°C to +65°C.

SENSORS EXPO & CONFERENCE

Sensors 2019 Hits Silicon Valley June 25-27!

Join 7,000+ engineers this June in San Jose at the sensor industry’s biggest event! With 65+ Technical Sessions, 100+ Leading Speakers, 10 new and updated tracks, and 300+ Interactive Exhibits, there’s more opportunity than ever to connect with this booming industry and the technologies driving it. See thousands of the newest technologies in action, learn about the latest applications, and develop invaluable partnerships at the only event dedicated to sensors, connectivity, and systems.

 

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

 

The LPS33W is in mass production now, in a 3.3-mm diameter x 2.9 mm cylindrical metal case, priced from $3.60 each/1,000. For deeper revelations, take a look at the LPS33W datasheet.

Suggested Articles

Vocabulary speech recognition platform offers a fast and reliable voice interface without privacy concerns.

Flow switches operate on the well-known variable-area principle.

Advanced batch video and image processing streamlines workflows and is available as free trial.