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Winsen MQ-2 Manual

Flammable gas sensor
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Flammable Gas Sensor
（Model：MQ-2）
Manual
Version: 1.4
Valid from: 2015-03-10
Zhengzhou Winsen Electronics Technology Co., Ltd

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Summary of Contents for Winsen MQ-2

  • Page 1 Flammable Gas Sensor （Model：MQ-2） Manual Version: 1.4 Valid from: 2015-03-10 Zhengzhou Winsen Electronics Technology Co., Ltd...
  • Page 2 Statement This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways.

  • Page 3: Main Applications

    MQ-2 gas sensor has high sensitivity to propane and smoke, also can detect the natural gas and other flammable steam well. It is with low cost and suitable for different applications of detecting kinds of flammable gases.
  • Page 4 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Basic Circuit Fig2. MQ-2 Test Circuit Instructions: The above fig is the basic test circuit of MQ-2.The sensor requires two voltage inputs: heater voltage(V ) and circuit voltage(V ). V is used to supply standard working temperature to...
  • Page 5 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Concentration Time(s) Fig5.Sensitity Curve Fig6.Responce and Resume Fig5 shows the V in propane with different concentration. The Fig5 shows the changing of V in the process of putting the sensor into target gas and removing it out.
  • Page 6 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com 1.3 Alkali, Alkali metals salt, halogen pollution The sensors performance will be changed badly if sensors be sprayed polluted by alkali metals salt especially brine, or be exposed to halogen such as fluorine.
  • Page 7 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com If sensors meet strong concussion, it may lead its lead wire disconnected. 2.7 Usage Conditions 2.7.1For sensor, handmade welding is optimal way. The welding conditions as follow:  Soldering flux: Rosin soldering flux contains least chlorine ...