MQ-5 Gas Sensor

WAVESHARE Electronics Ltd.
Overview Sensitive for LPG, natural gas, coal gas Output voltage boosts along with the concentration of the measured gases increases Fast response and recovery Adjustable sensitivity Signal output indicator Specifications Power: 2.5V ~ 5.0V Dimension: 40.0mm * 21.0mm Mounting holes size: 2.0mm
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MQ-5 Gas Sensor User Manual Waveshare MQ-5 Gas Sensor User Manual 1. Features Liquefied gas, natural gas and coal gas PT1301 2.5V-5.0V 40.0mm*21.0mm 2.0mm Sensitive gas Boost converter chip Operating voltage Dimensions Fixing hole size Operating principle: MQ-5 gas sensor applies SnO2 which has a lower conductivity in the clear air as a gas-sensing material. In an atmosphere where there may be inflammable gases, the conductivity of the gas sensor raises along with the inflammable gas concentration increases. MQ-5 plays a high performance in detecting butane, propane and methane, and can identify both propane and methane at a same time. MQ-5 is highly sensitive to natural gas. It features with the ability to detect various inflammable gases and lower cost, making it an ideal choice of different applications of gas detection. 2. Applications This module can be applied to liquefied gas, natural gas and/or coal gas monitoring devices for household or industrial usage. 3. Interfaces Pin No. Symbol Descriptions 1 2 3 DOUT AOUT GND 4 VCC Digital output Analog output Power ground Positive power supply (2.5V-5.0V) 4. How to use We will illustrate the usage of the module with an example of sensitive gas detection by connecting a development board. ① Download the relative codes to the development board. ② Connect the development board to a PC via a serial wire and the module to the development board. Then, power up the development board and start the serial debugging software. Here is the configuration of the connection between the module and the development board. 1 PDF
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Дата модификации: 18.09.2014

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