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Summary of Contents for Winsen MQ135
- Page 1 Air Quality Gas Sensor （Model：MQ135） 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.
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Page 3: Main Applications
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com MQ135 Semiconductor Sensor for Air Quality Profile Sensitive material of MQ135 gas sensor is SnO which with lower conductivity in clean air. When target pollution gas exists, the sensor’s conductivity gets higher along with the gas concentration rising. - Page 4 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Basic Circuit Fig2. MQ135 Test Circuit Instructions: The above fig is the basic test circuit of MQ135.The sensor requires two voltage inputs: heater voltage (V ) and circuit voltage(V ). V is used to supply standard working temperature to the...
- Page 5 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Time (s) Concentration (ppm) Fig5.Sensitity Curve Fig6.Responce and Resume Fig5 shows the V in H2 gas with different concentration. Fig5 shows the changing of V in the process of putting The resistance load R is 4.7 KΩ...
- Page 6 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com 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. 1.4 Touch water Sensitivity of the sensors will be reduced when spattered or dipped in water.
- Page 7 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Soldering flux: Rosin soldering flux contains least chlorine homothermal soldering iron Temperature： 250℃ Time：less than 3 seconds 2.7.1If users choose wave-soldering, the following conditions should be obey: Soldering flux: Rosin soldering flux contains least chlorine ...
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