描述
MQ-8 氫氣檢測報警感測模組 四針帶數位輸出可調整靈敏度
MQ-8氣體傳感器所使用的氣敏材料是在清潔空氣中電導率較低的二氧化錫(SnO2)。當傳感器所處環境中存在可燃氣體時，傳感器的電導率隨空氣中可燃氣體濃度的增加而增大。使用簡單的電路即可將電導率的變化轉換為與該氣體濃度相對應的輸出信號。MQ-8氣體傳感器對氫氣的靈敏度高，對其他含氫氣體的監測也很理想。這種傳感器可檢測多種含氫氣體，特別是城市煤氣，是一款適合多種應用的低成本傳感器。
[porto_block id=”2106″ name=”mq-sensor” animation_type=”bounce”]
Arduino 範例程式碼 適用於所有 MQ 氣體感測器
/* MQ Sensor Circuit with Arduino */
const int AOUTpin=0;//the AOUT pin of the MQ sensor goes into analog pin A0 of the arduino
const int DOUTpin=8;//the DOUT pin of the MQ sensor goes into digital pin D8 of the arduino
const int ledPin=13;//the anode of the LED connects to digital pin D13 of the arduino
int limit;
int value;
void setup() {
Serial.begin(115200);//sets the baud rate
pinMode(DOUTpin, INPUT);//sets the pin as an input to the arduino
pinMode(ledPin, OUTPUT);//sets the pin as an output of the arduino
}
void loop()
{
value= analogRead(AOUTpin);//reads the analaog value from the MQ sensor's AOUT pin
limit= digitalRead(DOUTpin);//reads the digital value from the MQ sensor's DOUT pin
Serial.print("Gas value: ");
Serial.println(value);//prints the CO value
Serial.print("Limit: ");
Serial.print(limit);//prints the limit reached as either LOW or HIGH (above or underneath)
delay(100);
if (limit == HIGH){
digitalWrite(ledPin, HIGH);//if limit has been reached, LED turns on as status indicator
}
else{
digitalWrite(ledPin, LOW);//if threshold not reached, LED remains off
}
}
MQ8 MQ-8 Hydrogen Gas Detector Sensor MQ8 Gas Sensor Module For Arduino
MQ-8 Sensor Description: Sensitive material MQ-8 gas sensor is used in clean air low conductivity tin oxide (SnO2). When there is the environment in which the combustible gas sensor , conductivity sensor with increasing concentration of combustible gases in air increases. Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal. MQ-8 hydrogen gas sensor of high sensitivity , the monitoring of the other hydrogen-containing gas is also very satisfactory. This sensor can detect a wide range of hydrogen gas , city gas in particular , is a low-cost sensor for a variety of applications . Module Applications: Suitable for home or industrial hydrogen leakage monitoring devices. Can not interfere with ethanol vapor , soot , carbon monoxide and other gases.
Module Features :
1. Using high-quality dual-panel design, with power indicator and TTL signal output instructions ;
2. The switching signal having a DO (TTL) output and analog output AO ;
3. TTL output valid signal is low . ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )
4. The higher the voltage , the concentration of the analog output voltage is higher.
5. A hydrogen gas detection with good sensitivity .
6. There are four screw holes for easy positioning ;
7. Product dimensions : 32 (L) * 20 (W) * 22 (H)
8. Has a long life and reliable stability
9. Rapid response and recovery characteristics
Electrical properties:
Input voltage : DC5V Power consumption ( current ): 150mA
DO output : TTL digital 0 and 1 ( 0.1 and 5V)
AO output :0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
