Air Pressure Sensors

Types:

• Capacitive (one plate moves in response to pressure changes)
• Inductive (a coil or core moves in response to pressure changes)
• Piezoelectric (a piezo crystal deforms in response to pressure changes)

MPX5010 Integrated Pressure Sensor:

• Pressure range (0 - 10 kPa)
• Output voltage (0.2 - 4.7 V)
• On-chip temperature compensation, calibration, and signal conditioning
• Various packages and types (gauge or differential):

  

• Chip design

Interfacing an MPX Sensor to the Arduino:

• The MPX outputs an analog voltage and thus can simply be read as demonstrated for the accelerometer in a previous section (MPXV5010GC7U Pin 2: +5V, Pin 3: GND, Pin 4: Vout).
• Note that an applied negative pressure will produce a voltage lower than that output for the ambient pressure level.