MPX10DP Differential Pressure Sensor
MPX10DP Differential Pressure Sensor
Precise Low Pressure Analog Output
Infographic Overview
MPX10DP PRESSURE SENSOR ais a high-precision differential pressure sensor designed to measure the difference between two pressures (P1 P2).
It is widely used in:
Airflow measurement
Medical devices
Industrial control systems
Measures very low pressure changes (up to 10 kPa) with high accuracy
Working Principle
Pressure P1 Silicon Diaphragm (Strain Gauge)Pressure P2 Resistance Change'Wheatstone Bridge Output'Small Analog Voltage (mV)
Uses piezoresistive sensing (strain gauges on silicon) Pressure difference bends diaphragm changes produces voltage
Output is linear with pressure
Pin Configurationtial (not ground-referenced)
Dual Port Structure
Port P1 Positive pressure
Port P2 Reference pressure
Measurement:
If P1 > P2 Positive output
If P1 < P2 Negative output
Ideal for airflow / vacuum measurement
Key Features
High accuracy (1%) Linear analog output On-chip temperature compensation & calibration Low power consumption (~6 mA) Fast response (~1 ms) Wide temperature range (-40C to 125C)
Technical Specifications
Parameter | Value |
Pressure Range | 0 10 kPa |
Max Pressure | 75 kPa |
Output Voltage | 0 on>3V 6V |
Output Type | Wheatstone Bridge |
Response Time | ~1 ms |
Important Note (VERY IMPORTANT)
Output is VERY SMALL (millivolts)
Cannot directly connect to Arduino ADC
Needs:
Instrumentation amplifier (e.g., OP-AMP)
OR ADC module (16-bit recommended)
From practical use:
You absolutely need a good amplifier signal is only millivolts.
Output Behavior
Pressure Difference | Output |
0 kPa | ~0 mV |
5 kPa | ~17.5 mV |
10 kPa | ~35 mV |
Linear relationship easy to calculate
Applications
onirometry) HVAC systems Liquid level measurement Leak detection systems
Advantages
Very high sensitivity (good for small pressure changes) Accurate and stable Fast response Reliable industrial-grade sensor
Limitations
Requires external amplification Not beginner-friendly (signal conditioning needed) Sensitive to noise Not plug-and-play like digital sensors
Basic Interfacing Idea
MPX10DP Instrumentation Amplifier Arduino ADC
Example amplifier IC:
INA125
HX711 (for bridge sensors)
Pro Tips
Use shielded cables to reduce noise Keep circuit short and clean Use precision op-amp for amplification Calibrate with r:
Airflow measurement Scientific experiments Medical and industrial applications
Best suited for advanced projects where accurate low-pressur