Ks0046 keyestudio MQ-8 Hydrogen Gas Sensor: Difference between revisions

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<br>
==Introduction==
==Introduction==
The gas sensitive material used in MQ-8 gas sensor is SnO2, which is of lower electrical conductivity in clean air. When there is hydrogen in the environment where sensor resides, the electrical conductivity of the sensor increases with the increase of the hydrogen concentration in the air. The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit. The sensitivity of MQ-8 gas sensor to hydrogen is quite high, it can also detects a variety of other gases containing hydrogen. This sensor, which is suitable for a variety of applications, is definitely a good catch.
The gas sensitive material used in MQ-8 gas sensor is SnO2, which is of lower electrical conductivity in clean air. <br>
<br>[[File:461.png|500px|frameless|thumb]]<br>
When there is hydrogen in the environment where sensor resides, the electrical conductivity of the sensor increases with the increase of the hydrogen concentration in the air. <br>
The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit. <br>
The sensitivity of MQ-8 gas sensor to hydrogen is quite high, it can also detect a variety of other gases containing hydrogen. <br>
This sensor is suitable for a variety of applications, is definitely a good catch.<br>
<br>[[File:Ks0046.jpg|500px|frameless|thumb]]<br>


<br>
==Feature==
==Feature==
* good sensitivity to hydrogen in a wide range of concentrations.
* good sensitivity to hydrogen in a wide range of concentrations.
Line 8: Line 15:
* simple drive circuit
* simple drive circuit


==Application==
<br>
* household gas leak alarm
==Specification==
* Industrial-level hydrogen alarm
* Detectable concentration: 100-1000ppm (hydrogen)
* Portable gas detector
* Operating voltage: 5V
* Heating voltage VH: 5.0V±0.1V AC or DC 
* Load resistance RL: adjustable
* Heating resistance RH: 29±3Ω(Room temperature)
* Heating power: PH ≤900mW 
* Sensitivity S: Rs(in air)/Rs(1000ppm H2)≥5 
* Output voltage Vs: 2.5-4.0V(1000ppm H2)
* Concentration slope: α≤0.6(R1000ppm/R400ppm H2)
* Temperature ; humidity: 20℃±2℃;55%±5%RH
* Standard test circuit: Vc:5.0V±0.1V;VH: 5.0V±0.1V
 
<br>


==Specification==
*Detectable Concentration: 100-1000ppm (hydrogen)
*Loop Voltage Vc: ≤24V  DC
*Heating Voltage VH: 5.0V±0.1V AC or DC
*Load Resistance RL: adjustable
*Heating Resistance RH: 29±3Ω(Room temperature)
*Heating Power: PH ≤900mW
*Sensitivity S: Rs(in air)/Rs(1000ppm H2)≥5
*Output Voltage Vs: 2.5-4.0V(1000ppm H2)
*Concentration Slope: α≤0.6(R1000ppm/R400ppm H2)
*Temperature, Humidity: 20℃±2℃;55%±5%RH
*Standard Test Circuit: Vc:5.0V±0.1V;
==Connection Diagram ==
==Connection Diagram ==
<br>[[File:Ks0042-2.png|700px|frameless|thumb]]<br>


<br>[[File:462.png|500px|frameless|thumb]]<br>


<br>
==Sample Code ==
==Sample Code ==


<pre>
<pre>
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Serial.println(val,DEC);//Print the value to serial port
Serial.println(val,DEC);//Print the value to serial port
delay(100);
delay(100);
}</pre>
}
</pre>
 
<br>[[File:Ks0042-1.png|600px|frameless|thumb]]<br>
 
<br>
==Application==
* household gas leak alarm
* Industrial-level hydrogen alarm
* Portable gas detector
 
<br>
==Resources ==
 
* '''Video'''<br>
http://video.keyestudio.com/ks0040/
 
* '''PDF and Code'''<br>
https://fs.keyestudio.com/KS0046
 
 
<br>
 
==Buy from ==
 
*[https://www.keyestudio.com/keyestudio-mq-8-hydrogen-sensor-detection-module-for-arduino-p0120.html  '''Official Website''']


*[https://www.aliexpress.com/store/product/Keyestudio-MQ-8-Hydrogen-sensor-detection-module-for-Arduino/1452162_32628912079.html?spm=2114.12010612.8148356.39.77321414ddNxgj  '''Shop on aliexpress''']




[[Category: Sensor]]
[[Category: Sensor]]

Latest revision as of 14:00, 7 January 2021


Introduction

The gas sensitive material used in MQ-8 gas sensor is SnO2, which is of lower electrical conductivity in clean air.
When there is hydrogen in the environment where sensor resides, the electrical conductivity of the sensor increases with the increase of the hydrogen concentration in the air.
The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit.
The sensitivity of MQ-8 gas sensor to hydrogen is quite high, it can also detect a variety of other gases containing hydrogen.
This sensor is suitable for a variety of applications, is definitely a good catch.

thumb


Feature

  • good sensitivity to hydrogen in a wide range of concentrations.
  • long service life, low cost
  • simple drive circuit


Specification

  • Detectable concentration: 100-1000ppm (hydrogen)
  • Operating voltage: 5V
  • Heating voltage VH: 5.0V±0.1V AC or DC
  • Load resistance RL: adjustable
  • Heating resistance RH: 29±3Ω(Room temperature)
  • Heating power: PH ≤900mW
  • Sensitivity S: Rs(in air)/Rs(1000ppm H2)≥5
  • Output voltage Vs: 2.5-4.0V(1000ppm H2)
  • Concentration slope: α≤0.6(R1000ppm/R400ppm H2)
  • Temperature ; humidity: 20℃±2℃;55%±5%RH
  • Standard test circuit: Vc:5.0V±0.1V;VH: 5.0V±0.1V


Connection Diagram


thumb



Sample Code

///Arduino Sample Code
void setup()
{
  Serial.begin(9600); //Set serial baud rate at 9600 bps
}
void loop()
{
int val;
val=analogRead(0);//Read Gas value from analog 0
Serial.println(val,DEC);//Print the value to serial port
delay(100);
}


thumb


Application

  • household gas leak alarm
  • Industrial-level hydrogen alarm
  • Portable gas detector


Resources

  • Video

http://video.keyestudio.com/ks0040/

  • PDF and Code

https://fs.keyestudio.com/KS0046



Buy from