# MQ2传感器模块

## 概述

NOVA烟雾传感器MQ-2模块是用于测量空气中的烟雾，其灵敏度高、响应时间快、测量可以尽快，传感器的灵敏度可以调节使用电位计。这个传感器输出电压空气中的烟雾浓度成正比。

## 参数

* 尺寸：40x23mm
* 输入电压：5V
* 工作温度：-10℃-50℃
* 具有输出调节电位器：顺时针调节大，逆时针调节小
* 接口模式：2510-3p
* 引脚定义：1-控制端 2-电源 3-地

## 接口说明

* 可用端口： A0、A1、A2、A3、S0、S1、S2、S3

## 使用方式

![](/files/-LWJhcUbw0qN7cfzeKvt)

## 示例代码

![](/files/-LWJhcUdhicuqNoterWw)

[MQ2传感器模块示例代码](http://www.haohaodada.com/show.php?id=947448)

## 原理图

{% file src="/files/-LrCZuO-hHbs9ZMQKRhf" %}
MQ2传感器模块原理图
{% endfile %}

## 尺寸说明

![](/files/-LWJhcUfhNitBmAb024J)

## 常见问题


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