DF Robot Differential Pressure Sensor - ±500pa

This high-resolution differential pressure sensor with I2C communication is used to measure the difference in pressure across two points on a device. A high-performance MEMS pressure chip and a special conditioning chip are encapsulated inside the sensor. It will give you a comparative measurement between two points. The sensor IC adopts a unique multi-stage temperature-compensation algorithm to reduce the effect of the environment on the sensor output.

Note: In order to ensure the measurement resolution and the sensor life, please use the sensor in the clean air. Do not let water enter the nozzle of the sensor, or it will cause damage to the sensor.

Quick Spec

• Operating Voltage: 3.3 ~ 5V
• Measuring Range: ±500pa (±1.5%FS)
• Operating Current: <5mA
• Communication Mode: I2C
• I2C Address: 0x00
• Operating Temperature Range: -40 ~ +85°C
• Temperature-compensation Range: -5 ~ +65°C
• Dimension: 14.5 x 24mm
• Net Weight: 10g

Board Layout

Wiring Diagram

Sample Code

/*!
 * @file readData.ino
 * @brief Read sensor pressure difference and temperature value
 * @copyright   Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @licence     The MIT License (MIT)
 * @author [fengli](li.feng@dfrobot.com)
 * @version  V1.0
 * @date  2020-05-14
 * @get from https://www.dfrobot.com
 * @url https://github.com/DFRobot/DFRobot_LWLP
 */
#include <DFRobot_LWLP.h>

/*! 
 * @brief Construct the function
 * @param pWire IC bus pointer object and construction device, can both pass or not pass parameters, Wire in default.
 * @param address Chip IIC address, addresses 0x0 
 */
DFRobot_LWLP lwlp;


void setup() {

  Serial.begin(9600);
  //Init chip 
  while (lwlp.begin() != 0) {
  Serial.println("Failed to initialize the chip, please confirm the chip connection");
  delay(1000);
  }
  //Auto calibration differential pressure drift
  lwlp.autoCorDrift();
  //Manual calibration differential pressure drift
  //lwlp.passiveCorDrift(/*Drift = */8.23);
}
void loop(void){
  DFRobot_LWLP::sLwlp_t data;
  //Get data of single measurement 
  data = lwlp.getData();
  //Get filter-processed data 
  //data = lwlp.getfilterData();
  //Get temperature in unit centigrade degree
  Serial.print("Temperature: ");
  Serial.print(data.temperature);
  Serial.println(" C");
  Serial.print("Differential Pressure: ");
  //Get pressure difference in unit pa 
  Serial.print(data.presure);
  Serial.println(" pa");
  delay(500);
}

Resources

• Product Page
• Product Wiki
• Schematic
• Mechanical Diagram

Shipping List

• 1 x Differential Pressure Sensor (±500pa)
• 1 x 2.54-4P Black Single Row Pin Header
• 1 x Silicone Tube (20cm)