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$26.00
Application:It is widely used in domestic CO gas leakage alarm, industrial CO gas alarm and portable CO gas detector.
Feature:It has good sensitivity to carbon monoxide in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Feature:It has good sensitivity to carbon monoxide in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Availability:
493 In Stock
Categories:
Civil Security, CO sensor, Combustible Gas Detection
Production Description:
Sensitive material of MQ-7B gas sensor is SnO2, which with lower conductivity in clean air. It make detection by method of cycle high and low temperature, and detect CO at low temperature (heated by 1.5V).The sensor’s conductivity gets higher along with the CO gas concentration rising. At high temperature (heated by 5.0V),it cleans the other gases adsorbed at low temperature. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
Feature:
It has good sensitivity to carbon monoxide in wide range, and has advantages such as long lifespan, low cost and simple drive circuit &etc.
Application:
It is widely used in domestic CO gas leakage alarm, industrial CO gas alarm and portable CO gas detector.
Technical Parameters：
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Model |
MQ-7B |
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Sensor Type |
Semiconductor |
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Standard Encapsulation |
Plastic cap |
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Target Gas |
carbon monoxide |
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Detection range |
10～500ppm CO |
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Standard Circuit Conditions |
Loop Voltage |
Vc |
5.0V±0.1V DC |
|
Heater Voltage |
VH |
5.0V±0.1V AC or DC(High temp.) 1.5V±0.1V AC or DC(Low temp.) |
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Heater Time |
TL |
60 S±1S(High temp.) 90 S±1S(Low temp.) |
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Load Resistance |
RL |
Adjustable |
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Sensor character under standard test conditions |
Heater Resistance |
RH |
30Ω±3Ω (room temp.) |
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Heater consumption |
PH |
≤950mW |
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Sensitivity |
S |
Rs(in air)/Rs(in 150ppm CO)≥5 |
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Output Voltage |
Vs |
2.5V～4.3V (in 150ppm CO) |
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Concentration Slope |
α |
≤0.6(R300ppm/R50ppmCO) |
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Standard test conditions |
Tem. Humidity |
20℃±2℃；55%±5%RH |
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Standard test circuit |
Vc:5.0V±0.1V； VH (High temp.): 5.0V±0.1V VH (Low temp.): 1.5V±0.1V |
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Preheat time |
Not less than 48 hours |
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O2 content |
21%（not less than 18%） O2 concentration effects initial value, sensitivity and repeatability. |
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Preheat time |
Over 48 hours |
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Lifespan |
10years |
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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
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 TRACKINGTracking 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.
