Winsen MQ-7B Carbon Monoxide Sensor

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SKU: rz24313435 Category: Gas and Dust Sensor

Description

A silicon microchip, housed in a plastic shell, sends an electrical charge to a small detection chamber that contains a CO sensor. This sensor can detect and measure CO concentration in the atmosphere. If the sensor detects high levels of CO, the microchip will trigger an alarm

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.

Applications:

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

Features:

Small in size
Best quality product
High sensitivity, high resolution, low power consumption
Fast response time
Excellent stability
Long lifespan
Anti-poisons, anti-vapor interference

Specifications:

Model: MQ-7B
Sensor Type: Semiconductor
Standard Encapsulation: Plastic cap
Target Gas: carbon monoxide
Detection range: 10～500ppm CO
Heater consumption PH: ≤900mW
Sensitivity S: Rs(in air)/Rs(in 150ppm CO)≥5

Note: For more Info Check User Manual

Packages Includes:

1 x Winsen MQ-7B Carbon Monoxide Sensor

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Shipping & Delivery

Shipping and Delivery Policy

1. Shipping Process:

Orders are processed within 1-2 business days after payment confirmation.
Delivery time varies based on location and selected shipping method, typically ranging between 3-7 business days.
We partner with trusted courier services to ensure timely and safe delivery.

2. Shipping Charges:

Shipping charges are calculated at checkout based on the delivery location and package weight.
Free shipping may be available for orders above a specified amount, as mentioned on our website.

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5. Delivery Issues:

If a package is delayed, lost, or damaged during transit, please contact our support team immediately.
Claims for lost or damaged items must be reported within 48 hours of delivery.

6. No Return Policy for Opened/Soldered Products:

We do not accept returns for products that have been opened, used, or soldered.
Ensure you verify product compatibility before purchase, as returns will only be accepted for unopened and unused items in their original packaging.

7. Refund Policy:

Refunds will be issued only for canceled orders before shipment or wrong/damaged items received (subject to investigation).
No refunds or replacements for products that have been tampered with, soldered, or physically damaged by the customer.

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Detection range	0~100%
Working Pressure Range	0.5~2.0Bar
Working Voltage	3.3～5.5V DC
Output Signal	I2C , UART (0~3V) , analog voltage
Lifespan	＞2 years (in air)
Working Humidity Range	0-99% RH (non-condensing)
Working Temperature Range (°C)	-20°C ~ +50°C
Product Dimensions	32mm x 27mm/1.26 x 1.06 inch
Response Time ( μS)	＜5S
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Detection range	0~1000ppm
Working Voltage	3.3～5.5V DC
Working Current	＜5mA
Output Signal	I2C , UART (0~3V) , analog voltage
Working Temperature	-20～50℃
Working Humidity	15～90%RH (non-condensing)
Storage Temperature	-20～50℃
Communication Protocol	I2C , UART and analog
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Storage Humidity	15～90%RH (non-condensing)
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Model	DFRobot Gravity Lab Grade Analog ORP Sensor
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Module Power	+5.00V
Working Temperature Range (°C)	5-70℃
Product Dimensions	40mm X 27mm(1.57″x1.06″)
Measuring Range	– 2000mV—2000mV
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Response Time ( μS)	≤20sec

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Heater voltage	5.0±0.2V DC
Circuit Voltage	5.0±0.2V DC
Heater Current	56±5mA
Minimum impedance between Pin#2,3 and GND	2.5MΩ
Operating conditions	0˚~40˚C , 30~95%RH
Temperature differential between inside and outside detector casing	≤10˚C max. (see NOTE 1)
Test gas conditions	1250±100ppm iso-butane in air at 20˚±2˚C , 65±5%RH
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Heater Current	56±5mA
Operating conditions	0˚~40˚C , 30~95%RH
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Circuit current	10mA (max)
Reference voltage	1.0~4.0V DC (NOTE 2)

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Heater Resistance	approx 59Ω at room temp.
Heater Voltage	5.0±0.2V DC
Load Resistance	variable 0.45kΩ min
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Circuit Voltage	5.0±0.2V DC
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Standard Package	TO-5 metal can
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Test Gas Conditions	iso-butane in air at 20±2˚C , 65±5%RH
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Heater power consumption	525mW (typical)
Target Gases	Hydrogen , methane , iso-butane
Test Gas Conditions	Hydrogen/methane/iso-butane in air at 20±2˚C , 65±5%RH
Zero offset	-15 ~ +55mV

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