$12.00

Application:It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.
Feature:It has good sensitivity to methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.

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Availability: 338 In Stock


Production 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.
Feature:
It has good sensitivity to methane in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Application:
It is widely used in domestic gas leakage alarm, industrial flammable gas alarm and portable gas detector.

Technical Parameters:

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.

Lifespan

10 years




1. WORLDWIDE SHIPPING (Except some countries and APO/FPO)

We provide Worldwide Shipping by DHL, Fedex, Standard shipping (China Post e-Packet) and some other shipping ways on ALL ITEMS!

2. SERVICE TRANSIT TIME is provided by the carrier.
  • Reference Delivery time (working days):
  • DHL:3-7 days
  • Fedex:3-7 days
  • China Post e-Packet : 15-35 days
Note:

Transit times may vary, particularly during the holiday season.

We suggest you choose Expedited Shipping(DHL or FedEx) to ensure the products reach your home fast & safety.

3. ORDERS PROCESSED TIMELY after the payment verification.

We do our best to process & ship all orders as soon as possible. Most orders are processed within 48 hours.

Note:

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b.We accept DROP SHIPPING. You can leave us your customer’s address, when you place an order,then your customers can get the goods directly.

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Note:

Sometimes you may can't get your package within expected time, please be patient for a few more days. Because we can't control the delivery time or condition when package on shipping. Certainly, we are glad that you can contact us for help. Our goal is to make customer satisfied!

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