MPX10DP Pressure Sensors 0kPa to 10kPa

MPX10DP Pressure Sensor 0kPa to 10kPa is a dual-port, silicon piezoresistive pressure sensor that provides a highly accurate and linear voltage output proportional to the applied differential pressure. This specialized transducer utilizes an advanced ion-implanted piezoresistive strain gauge, which resides on a monolithic silicon diaphragm to ensure exceptional reliability. Consequently, the MPX10DP excels in applications requiring precise measurement of low-level air or liquid pressure differences. The device features a dual-port “Case 344C” design that allows for easy connection to flexible tubing. Furthermore, its uncompensated nature offers engineers the flexibility to design custom calibration and temperature compensation circuitry tailored to specific environmental needs. Therefore, you can integrate this sensor into medical, industrial, and HVAC systems where cost-effectiveness and precision are paramount.

Key Features:

• Differential Pressure Measurement: The dual-port configuration enables the sensor to measure the pressure difference between two sources, making it ideal for flow and level sensing.
• High Linearity: This sensor maintains a very low linearity error across the entire 0 to 10 kPa range, ensuring predictable signal processing.
• Piezoresistive Technology: Utilizes a monolithic silicon shear stress strain gauge that provides high sensitivity and stable performance.
• Robust Construction: The durable thermoplastic case protects the internal silicon diaphragm from mechanical stress and environmental factors.
• Easy Integration: Features a standard 4-pin lead frame that fits perfectly into through-hole PCB layouts or breadboards for rapid prototyping.

Technical Specifications:

• Pressure Range: 0 to 10 kPa (0 to 1.45 psi)
• Supply Voltage (V_S): 3.0 V_DC (Typical) to 6.0 V_DC (Maximum)
• Full Scale Span (V_FSS): 20 mV to 50 mV (Typically 35 mV @ 3.0V)
• Sensitivity: ≈ 3.5 mV/kPa
• Input Impedance (Z_in): 400 Ω to 1000 Ω
• Output Impedance (Z_out): 400 Ω to 1000 Ω
• Linearity Error: ±1.0% V_FSS (Maximum)
• Operating Temperature Range: −40°C to +125°C

Mechanical Specifications:

• Case Style: Case 344C-01 (Dual Port)
• Port Material: High-temperature thermoplastic
• Diaphragm Material: Silicon Piezoresistive
• Pressure Media: Non-corrosive gases and dry air
• Mounting Type: Through-hole (PCB Mount)

Dimensions:

• Overall Length: ≈ 29.2 mm (including ports)
• Body Height: ≈ 16.2 mm
• Port Diameter: ≈ 4.8 mm (Designed for 3/16 inch ID tubing)
• Pin Pitch: 2.54 mm (0.1 inch)

Pinout and Wiring:

• Pin 1 (GND): Connect to the circuit ground (0 V).
• Pin 2 (V_out+): Positive differential output voltage signal.
• Pin 3 (V_S): Positive supply voltage (Typically 3.0 V).
• Pin 4 (V_out-): Negative differential output voltage signal.
• Wiring Note: However, because this sensor provides a millivolt-level analog output, you must use an instrumentation amplifier (like an AD620 or LM358 in a differential setup) before feeding the signal to an ADC.

Datasheet Reference:

• Download NXP MPX10 Series Datasheet

Commonly Used in:

• Arduino/ESP32 Projects: Hobbyists use this sensor to build digital barometers, altimeters, and liquid level monitors.
• Medical Instrumentation: Found in respiratory monitors and blood pressure testing equipment requiring low-pressure sensitivity.
• HVAC Systems: Monitoring air filter clogging or measuring duct airflow through pressure differentials.

Applications:

• Liquid Level Sensing: Measuring the head pressure in a tank to determine the depth of the fluid.
• Flow Rate Measurement: Calculating gas flow velocity by measuring the pressure drop across a venturi or orifice plate.
• Vacuum Monitoring: Detecting small vacuum levels in process control or laboratory equipment.

Equivalent Models:

• MPX12DP: A slightly different sensitivity range but shares the same footprint and dual-port physical design.
• MPX2010DP: A temperature-compensated version of the 10 kPa sensor that simplifies circuit design by including internal resistors.
• Honeywell ASDX Series: Offers digital or compensated analog outputs, however, it usually carries a higher cost than the MPX10 series.

Package Includes:

• 1 x MPX10DP Pressure Sensor (0kPa to 10kPa, Dual Port)