MQ131 Gas Sensor Module (SnO2) MQ-131 (PCB สีเขียว)

• Stable and Long Life
• High sensitivity to Ozone
• Good sensitivity to CL2, NO2, etc
• Output voltage boosts along with the concentration of the measured gases increases
• Fast response and recovery
• Adjustable sensitivity
• On-board LED indicator
• Both digital and analog outputs

• Operating Voltage : 5V ±0.1
• Operating Temperature : 20°C ~ 65°C
• Detection Concentration : 10 ~ 1000 ppm of Ozone
• Chip: LM393
• Board size: 32mm (L) x 20mm (W) x 22mm (H)

• Datasheet (คลิ๊ก)
• โค้ดตัวอย่าง (คลิ๊ก)

#include "MQ131.h"

void setup() {
Serial.begin(115200);

// Init the sensor
// - Heater control on pin 2
// - Sensor analog read on pin A0
// - Model LOW_CONCENTRATION
// - Load resistance RL of 10KOhms (10000 Ohms)
MQ131.begin(2,A0, LOW_CONCENTRATION, 10000);

Serial.println("Calibration in progress...");

MQ131.calibrate();

Serial.println("Calibration done!");
Serial.print("R0 = ");
Serial.print(MQ131.getR0());
Serial.println(" Ohms");
Serial.print("Time to heat = ");
Serial.print(MQ131.getTimeToRead());
Serial.println(" s");
}

void loop() {
Serial.println("Sampling...");
MQ131.sample();
Serial.print("Concentration O3 : ");
Serial.print(MQ131.getO3(PPM));
Serial.println(" ppm");
Serial.print("Concentration O3 : ");
Serial.print(MQ131.getO3(PPB));
Serial.println(" ppb");
Serial.print("Concentration O3 : ");
Serial.print(MQ131.getO3(MG_M3));
Serial.println(" mg/m3");
Serial.print("Concentration O3 : ");
Serial.print(MQ131.getO3(UG_M3));
Serial.println(" ug/m3");

delay(60000);
}