The MQ-7 Carbon Monoxide (CO) Gas Sensor Module is a precision device designed to detect the presence of CO, a colorless and odorless toxic gas. The sensor operates using a Tin Dioxide (SnO2) sensitive layer, which has lower conductivity in clean air. When Carbon Monoxide is present, the sensor’s conductivity increases. The MQ-7 uniquely uses a high and low temperature cycle to detect the gas; it detects CO at low temperatures (heated by 1.5V) and cleans out other adsorbed gases at high temperatures (heated by 5.0V). This module simplifies the process by managing the heating element and providing both an analog output for measuring CO concentration and a digital output with an adjustable threshold for simple alert-based systems.

Key Features:

• High Sensitivity to Carbon Monoxide: Specifically engineered for accurate and reliable detection of CO gas.

• Good Selectivity: Offers good resistance to interference from other common gases, ensuring more accurate CO readings.

• Dual Output Mode: Features both an analog output for precise concentration data and a digital output for easy integration into alarm circuits.

• Adjustable Threshold: An onboard potentiometer allows you to set the specific concentration level at which the digital output will trigger.

• Stable and Long-lasting: Designed for a long operational life with stable and consistent performance.

Technical Specifications:

• Operating Voltage: 5V DC

• Primary Detection Gas: Carbon Monoxide (CO)

• Detection Range: 20 to 2000 ppm (parts per million) CO

• Outputs: Analog (A0) and Digital (D0)

• Dimensions: 32mm x 20mm x 22mm

• Heating Method: High/Low Temperature Cycle

Common Applications:

• Domestic CO Alarms: The perfect sensor for building life-saving carbon monoxide detectors for homes, garages, and basements.

• Industrial Safety: Monitor CO levels in industrial environments, parking garages, and boiler rooms.

• Automotive and Marine Applications: Detect dangerous CO buildup from exhaust fumes in vehicle cabins or boat interiors.

• Air Quality Monitoring: Integrate into comprehensive air quality systems to specifically track CO levels.

• Educational Projects: An excellent component for demonstrating the principles of gas detection and creating practical safety devices.

Extra Description

Package Includes:

• 1 x MQ-7 Carbon Monoxide (CO) Gas Sensor Module

Why Choose This MQ-7 Gas Sensor? At Hitech Electronics & Hardware, we prioritize your safety and project success. Our MQ-7 sensor is a high-quality, reliable component that provides the accuracy needed for critical CO detection. Trust in our selection to deliver the performance your safety-focused projects demand.

Pro Tip: The MQ-7's unique high/low temperature cycle is key to its accuracy. For best results, power the module and allow it to run through several heating cycles to stabilize before taking critical measurements. Refer to the datasheet for specific timing on the heating cycles for advanced applications.