9Pcs MQ2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Sensor Module each 1pc For Arduino
<br />The sensor need to solder onto board by yourself
<br />DIY Kits
<br />Detailed tutorials including project introduction and source code CAN BE PROVIDED FOR FREE,contact us BY Email to get documents
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<br />MQ-5 Methane Gas Sensor Shield methane detector module For Arduino UNO Mega2560  
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<br />MQ-7 Carbon Monoxide CO Gas Sensor Module For Arduino UNO Mega 2560 A123  
<br />MQ-8 Hydrogen Gas Sensor Module Gas Sensor module for Arduino  
<br />MQ-9 Combustible Gas Sensor Detection Carbon Monoxide Alarm Module  
<br />MQ-135 Sensor Air Quality Sensor Hazardous Gas Detection Module for Arduino 
<br />Package included: 
<br />1 x MQ2 
<br />1 x MQ-3 
<br />1 x MQ-4 
<br />1 x MQ-5 
<br />1 x MQ-6 
<br />1 x MQ-7 
<br />1 x MQ-8 
<br />1 x MQ-9 
<br />1 x MQ-135 
<br />1 x 20pcs 20cm male to female jumper cable 
<br />1 x 20pcs 20cm female to female jumper cable