Ks0047 keyestudio MQ135 Air Quality Sensor: Difference between revisions

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<br>
==Introduction==
==Introduction==
MQ135 adopts SnO2 as its gas sensitive material because SnO2 has low electrical conductivity in the clean air. So when surrounded by polluted air, the electrical conductivity of MQ135 will increase with the increase of pollutants, and the change in electrical conductivity can be converted to corresponding output signal.   
MQ135 adopts SnO2 as its gas sensitive material because SnO2 has low electrical conductivity in the clean air. <br>
 
So when surrounded by polluted air, the electrical conductivity of MQ135 will increase with the increase of pollutants, and the change in electrical conductivity can be converted to corresponding output signal.  <br>
MQ135 has a high sensitivity to Ammonia, sulfide,  benzene vapor, smoke and other harmful gas. It can detect various harmful gases, making it a cost-effective choice suitable for multiple applications.
MQ135 has a high sensitivity to Ammonia, sulfide, benzene vapor, smoke and other harmful gas. <br>
<br>[[File:471.png|500px|frameless|thumb]]<br>
It can detect various harmful gases, making it a cost-effective choice suitable for multiple applications.<br>
 
<br>[[File:KS0040 (5).jpg|500px|frameless|thumb]]<br>


<br>
==Specification==
==Specification==
*Product Model: MQ135
* Product model: MQ135
*Product Type: Semiconductor gas sensor
* Product type: Semiconductor gas sensor
*Standard Package: Bakelite (Black Bakelite)
* Target gas: Ammonia; methylbenzene; hydrogen
*Target Gas: Ammonia; methylbenzene; hydrogen
* Standard circuit: Loop voltage  Vc ≤24V  DC
*Standard Circuit: Loop voltage  Vc ≤24V  DC
* Heater voltage: VH 5.0V±0.2V AC or DC
*Heater Voltage: VH 5.0V±0.2V AC or DC
* Load resistance: Adjustable RL
*Load Resistance: Adjustable RL
* Heater power consumption: PH ≤900mW
*Features of Sensitive Components under Standard Test Condition: Heating resistor RH 31Ω±3Ω (room temperature)
* Sensitivity: S Rs(in air)/Rs(100ppmNH3)≥5
*Heater Power Consumption: PH ≤900mW
* Concentration slope: α ≤0.6 (R100ppm/R50ppm NH3)
*Surface Resistance of Sensitive Material: Rs 2KΩ-20KΩ(in 100ppm NH3)
* Standard testing temperature/humidity: 20℃±2℃/65%±5%RH
*Sensitivity: S Rs(in air)/Rs(100ppmNH3)≥5
* Standard testing circuit: Vc:5.0V±0.1V; VH: 5.0V±0.1V
*Concentration Slope: α ≤0.6(R100ppm/R50ppm NH3)
* Preheating time: ≧48H
*Standard Testing Temperature/Humidity : 20℃±2℃/65%±5%RH
*Standard Testing Circuit: Vc:5.0V±0.1V
*VH: 5.0V±0.1V
*Preheating Time: ≧48H


<br>
==Connection Diagram ==
==Connection Diagram ==
<br>[[File:Ks0040-1.png|700px|frameless|thumb]]<br>


<br>[[File:472.png|500px|frameless|thumb]]<br>
<br>
 
==Sample Code ==
==Sample Code ==


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   int sensorValue = analogRead(A0);
   int sensorValue = analogRead(A0);
   Serial.println(sensorValue, DEC);
   Serial.println(sensorValue, DEC);
}</pre>
}
</pre>
 


<br>
==Result==
<br>[[File:Ks0042-1.png|600px|frameless|thumb]]<br>
Turn on Serial monitor to check the pollution index of the air surrounds you:
Turn on Serial monitor to check the pollution index of the air surrounds you:
<br>[[File:473.png|500px|frameless|thumb]]<br>  
<br>[[File:473.png|500px|frameless|thumb]]<br>  


<br>
==Resources ==
==Resources ==


'''Video'''
* '''Video'''<br>
http://video.keyestudio.com/ks0047/
 
* '''PDF'''<br>
https://drive.google.com/open?id=1xlQchuxoX9hDBVzbacdhsA-9m6KsecXQ


http://www.keyestudio.com/wp/ks0047/


'''PDF'''
<br>
==Buy from ==


https://drive.google.com/open?id=1xlQchuxoX9hDBVzbacdhsA-9m6KsecXQ
*[https://www.keyestudio.com/free-shipping-keyestudio-mq-135-sno2-benzene-sulfide-air-quality-sensor-module-for-arduino-p0116.html  '''Official Website''']


==Buy from ==
*[https://www.aliexpress.com/store/product/Free-shipping-Air-sensor-mq135-sensor-module/1452162_2052827560.html?spm=2114.12010612.8148356.37.77321414ddNxgj  '''Shop on aliexpress''']
'''Official Website'''


http://www.keyestudio.com/keyestudio-mq135-air-quality-sensor-for-arduino.html


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

Revision as of 11:49, 15 April 2019


Introduction

MQ135 adopts SnO2 as its gas sensitive material because SnO2 has low electrical conductivity in the clean air.
So when surrounded by polluted air, the electrical conductivity of MQ135 will increase with the increase of pollutants, and the change in electrical conductivity can be converted to corresponding output signal.
MQ135 has a high sensitivity to Ammonia, sulfide, benzene vapor, smoke and other harmful gas.
It can detect various harmful gases, making it a cost-effective choice suitable for multiple applications.

thumb


Specification

  • Product model: MQ135
  • Product type: Semiconductor gas sensor
  • Target gas: Ammonia; methylbenzene; hydrogen
  • Standard circuit: Loop voltage Vc ≤24V  DC
  • Heater voltage: VH 5.0V±0.2V AC or DC
  • Load resistance: Adjustable RL
  • Heater power consumption: PH ≤900mW
  • Sensitivity: S Rs(in air)/Rs(100ppmNH3)≥5
  • Concentration slope: α ≤0.6 (R100ppm/R50ppm NH3)
  • Standard testing temperature/humidity: 20℃±2℃/65%±5%RH
  • Standard testing circuit: Vc:5.0V±0.1V; VH: 5.0V±0.1V
  • Preheating time: ≧48H


Connection Diagram


thumb


Sample Code

/*
  AnalogReadSerial
 Reads an analog input on pin 0, prints the result to the serial monitor 
 
 This example code is in the public domain.
 */

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(A0);
  Serial.println(sensorValue, DEC);
}



Result


thumb
Turn on Serial monitor to check the pollution index of the air surrounds you:
thumb



Resources

  • Video

http://video.keyestudio.com/ks0047/

  • PDF

https://drive.google.com/open?id=1xlQchuxoX9hDBVzbacdhsA-9m6KsecXQ



Buy from

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