Target: methane CH4, natural gas, flammable gas
Model: MQ-4
Detection range: CH4(300-10000ppm)
Detection principle: semiconductor
Characteristics: High sensitivity to CH4 and strong anti-interference ability
Size: φ19×24.2
Working conditions: Loop Voltage:5±0.1V
Heater Voltage:5±0.1V
Heater consumption:≤1W
Notes: Height with pins

MQ-4 Manual download
Get Price Whatsapp

Description

Sensitive material of MQ-4 gas sensor is SnO2, which with lower conductivity in clean air. When the target flammable gas exist, the sensor’s conductivity gets higher along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
MQ-4 gas sensor has high sensitivity to methane, also has anti-interference to alcohol and other gases.

Application

It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.

Features

It has good sensitivity to methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.

Specifications

Model MQ-4
Sensor Type Semiconductor
Standard Encapsulation Bakelite, Metal cap
Target Gas Methane
Detection range 300~10000ppm(CH4)
Standard Circuit Conditions Loop Voltage Vc 5.0V±0.1V DC
Heater Voltage VH 5.0V±0.1V AC or DC
Load resistance RL Adjustable
Sensor character under standard test conditions Heater Resistance RH 28Ω±3Ω(room temp.)
Heater consumption PH ≤1W
Sensitivity S Rs(in air)/Rs(in 5000ppmCH4)≥5
Output Voltage Vs 2.5V~4.0V (in 5000ppm CH4)
Concentration Slope α ≤0.6(R5000ppm/R1000ppmCH4)
Standard test conditions Temp.  Humidity 20℃±2℃;55%±5%RH
Standard test circuit Vc:5.0V±0.1V VH:5.0V±0.1V
Preheat time Not less than 48 hours
O2content 21%(not less than 18%) O2 concentration effects initial value, sensitivity and repeatability.
Life span 10 years

* The description and specifications might be changed without notice. Please contact us for the latest information before placing orders.

Technical Support:

Customized technical design and function, LOGO and package are available without extra charge (including molding fee) for mass volume.

The sensors don't have sleeping mode. It can be set in program if needed.

All Winsen products go through strict inspections and tests to make sure they are 100% qualified before shipping out.

The sensor has been fully tested (not calibrated) before leaving the factory, but the module will be calibrated before leaving the factory.

However, after transportation and storage, the environment conditions change, and the surface of the sensor absorbs moisture, mixed gas, pollution matters, etc. It is recommended that customers perform aging and calibration after sensors become stable according to the program and use occasions of the whole device.

15﹪-90﹪RH without condensation,greater or less than this range or long-term high temperature and high humidity will affect the life of the sensor.

Our sensors are certified with CE, 3C, ROHS, anti-explosion, fire prevention, and coal mining safety according to different applications. And we provide assistance for new certification.

Many factors can cause the sensor to fail such as broken wires in transportation, poisoning, falling off of the sensitive material, damage to the heating wire (device), etc. Please find specific cause in each category with Winsen’s aftersales.

Winsen provides professional consultation and service before and after sales. We will recommend the best fitting sensor for your demand. If you have any problem, don’t hesitate to email us to sales@winsensor.com

Due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. But we will reply to your inquiry in 24 business hours.

LEADING GAS SENSING SOLUTION SUPPLIER

RELATED PRODUCTS