SEN0129

SEN0129 Datasheet

Analog Gas Sensor MQ4 SKU:SEN0129

Part	Datasheet
SEN0129	SEN0129 (pdf)

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Analog Gas Sensor MQ4 SKU:SEN0129 Contents • 1 Introduction Specification • 2 Pin Definition • 3 Potentiometer Connection Diagram Sample Code Introduction The MQ4 is used in gas leakage detecting equipment in consumer and industry markets,this sensor is suitable for detecting CH4,Natural gas, LNG, avoid exposure to alcohol, cooking fumes, and cigarette smoke. The sensitivity can be adjusted by the potentiometer. Specification • Power supply needs 5V • Interface type Analog • Pin Definition 1-Output 2-GND 3-VCC • High sensitivity to gas • Small sensitivity to alcohol, smoke • Fast response • Stable and long life • Simple drive circuit • Size 40x20mm Pin Definition Signal Output GND Power Analog Sensor Pin Definition Potentiometer Potentiometer is used to calibrate the readings from this sensor as stated on the datasheet SENSITVITY ADJUSTMENT Resistance value of MQ-4 is difference to various kinds and various concentration gases. So,When using this components, sensitivity adjustment is very necessary. we recommend that you calibrate the detector for 5000ppm of CH4 concentration in air and use value of Load resistance RL about to When accurately measuring, the proper alarm point for the gas detector should be determined after considering the temperature and humidity influence. Connection Diagram Analog sensor connection diagram Sample Code ///Arduino Sample Code void setup Serial.begin 9600 //Set serial baud rate to 9600 bps void loop int val=analogRead 0 ;Read Gas value from analog 0 Serial.println val,DEC ;//Print the value to serial port delay 100 ; Powered By DFRobot 2008-2017

PDF Datasheet Preview

Analog Gas Sensor MQ4 SKU:SEN0129

Contents
• 1 Introduction Specification
• 2 Pin Definition
• 3 Potentiometer

Connection Diagram Sample Code

Introduction

The MQ4 is used in gas leakage detecting equipment in consumer and industry markets,this sensor is suitable for detecting CH4,Natural gas, LNG, avoid exposure to alcohol, cooking fumes, and cigarette smoke. The sensitivity can be adjusted by the potentiometer.

Specification
• Power supply needs 5V
• Interface type Analog
• Pin Definition 1-Output 2-GND 3-VCC
• High sensitivity to gas
• Small sensitivity to alcohol, smoke
• Fast response
• Stable and long life
• Simple drive circuit
• Size 40x20mm

Pin Definition

Signal Output GND Power

Analog Sensor Pin Definition

Potentiometer

Potentiometer is used to calibrate the readings from this sensor as stated on the datasheet SENSITVITY ADJUSTMENT Resistance value of MQ-4 is difference to various kinds and various concentration gases. So,When using this components, sensitivity adjustment is very necessary. we recommend that you calibrate the detector for 5000ppm of CH4 concentration in air and use value of Load resistance RL about to When accurately measuring, the proper alarm point for the gas detector should be determined after considering the temperature and humidity influence.

Connection Diagram

Analog sensor connection diagram

Sample Code
///Arduino Sample Code void setup

Serial.begin 9600 //Set serial baud rate to 9600 bps void loop int val=analogRead 0 ;Read Gas value from analog 0 Serial.println val,DEC ;//Print the value to serial port delay 100 ;

Powered By DFRobot 2008-2017

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived SEN0129 Datasheet file may be downloaded here without warranties.

Datasheet ID: SEN0129 509061