Measure the difference between two pressures with this differential pressure sensor from Honeywell. It's suitable for surface mounting for ease of installation. It has a low supply voltage of just 3.3V DC, making it suitable for use in low-voltage applications. It has a wide operating pressure range of -5 to 5psi, so it's suitable for use in low to medium-pressure environments.

• Internal diagnostics to ensure higher accuracy
• Six-pin design makes it easy to mount onto a printed circuit board
• Fast startup time of just 5ms for rapid operation

• Food and beverage industry
• Process control
• Wind tunnel testing

A piezoresistive silicon pressure sensor like this one uses changes in electrical resistance to measure corresponding changes in pressure.