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Use a MPX motorolla sensor. MPX2100Ap its a good sensor.
"The MPX2100 and MPX2101 series device is a silicon piezoresistive pressure sensors
providing a highly accurate and linear voltage output — directly proportional to the
applied pressure. The sensor is a single, monolithic silicon diaphragm with the strain
gauge and a thin–film resistor network integrated on–chip. The chip is laser trimmed for
precise span and offset calibration and temperature compensation."
Features
• Temperature Compensated Over 0°C to +85°C
• Unique Silicon Shear Stress Strain Gauge
• Easy to Use Chip Carrier Package Options
• Available in Absolute, Differential and Gauge Configurations
• Ratiometric to Supply Voltage
• ±0.25% Linearity (MPX2100D)
Application Examples
• Pump/Motor Controllers
• Robotics
• Level Indicators
• Medical Diagnostics
• Pressure Switching
• Barometers
• Altimeters
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