$20.00
$16.00
Application:It is widely used in domestic alcohol gas alarm, industrial alcohol gas alarm and portable alcohol detector.
Feature:It has good sensitivity to alcohol in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.

FREE
SHIPPING

100% MONEY
BACK GUARANTEE

ONLINE
SUPPORT 24/7

Availability: 497 In Stock

Production Description:
Sensitive material of MQ-3B gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol 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-3B gas sensor has high sensitivity to alcohol gas and can resistant to the interference of gasoline, smoke and vapour. It is with low cost and suitable for various applications of detecting alcohol at different concentration.
Feature:
It has good sensitivity to alcohol in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Application:
It is widely used in domestic alcohol gas alarm, industrial alcohol gas alarm and portable alcohol detector.

Technical Parameters:

Model

MQ-3B

Sensor Type

Semiconductor

Standard Encapsulation

Plastic cap

Target Gas

Alcohol gas

Detection range

25~500ppm alcohol

Standard Circuit

Conditions

Loop Voltage

Vc

≤24V DC

Heater Voltage

VH

5.0V±0.1V AC or DC

Load Resistance

RL

Adjustable

Sensor character under standard test conditions

Heater Resistance

RH

29Ω±3Ω (room tem.)

Heater consumption

PH

≤900mW

Sensitivity

S

Ro(in air)/Rs(125ppm C2H5OH)≥5

Output Voltage

Vs

2.5V~4.0V (in125ppm C2H5OH)

Concentration Slope

α

≤0.6(R300ppm/R50ppmC2H5OH)

Standard test conditions

Tem.  Humidity

20℃±2℃;55%±5%RH

Standard test circuit

Vc:5.0V±0.1V  VH:5.0V±0.1V

Preheat time

Over 48 hours

O2 concentration

21%VOL(no less than 18%VOL)

Lifetime

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:

a.We only ship to confirmed order address. Your order address MUST MATCH your shipping address.

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.

4. PACKAGE STATUS TRACKING

Tracking and secure checkout are provided for all orders. https://www.17track.net/en - this tracking website can help you track the status of your package.

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!

Dear valued friends,

If you have any questions, our Customer Service staffs will be very glad to help you. We try our best to reply to your emails ASAP, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. Please allow 24 business hours for us to response. And you can also call us in +86-18595618735 or email us to enquiry@winsensor.com.

Thank you for your support, I hope everyone has a pleasant business trip in our store, and welcome you to come next!

If you buy more quantity, please contact us.

Buy multiple products by the "Add to cart" we will make the discount for you.