Key benefits Reliable carbon monoxide detection: Designed to monitor CO concentration and provide clear analog and TTL outputs for alarms, control systems, or data logging. Easy to integrate: Standard analog voltage output (higher voltage = higher concentration) plus TTL signal output and a visible power indicator make wiring into microcontroller or alarm circuits straightforward. Stable long-term performance: Tin dioxide sensing material and temperature-cycling operation deliver repeatable readings and long service life. Practical mounting and form factor: Double-panel design with four screw holes for secure, repeatable installation. Features and specifications Models: MO-7 sensor element and MQ-7 compatible module characteristics as described. Sensing material: Tin dioxide (SnO2), low conductivity in clean air. Detection method: High/low temperature cycle Low temperature (1.5 V heating) for sensitive carbon monoxide detection High temperature (5.0 V heating) to clean adsorbed gases and restore baseline Outputs: Analog output voltage proportional to gas concentration; TTL digital output signal available for alarm thresholds or control logic Indicators: Power indicator LED for quick visual confirmation Design: High-performance double panel layout; four mounting holes for easy positioning Sensitivity: High sensitivity to carbon monoxide; also responsive to gases such as methane and natural gas Durability: Long-term service life and reliable stability under normal operating conditions How it solves problems Early warning and automation: Converts gas concentration changes into usable analog and TTL signals so systems can trigger alarms, ventilation, or shutdowns before levels become dangerous. Reduces false readings: Periodic high-temperature cleaning reduces drift from adsorbed contaminants, improving long-term accuracy and reducing maintenance. Simple system integration: Standard outputs and mounting options let engineers and technicians install the sensor quickly into embedded systems, alarm modules, or test rigs. Typical applications Home and building safety: Integration into CO alarm units, furnace or boiler monitoring, and ventilation control in residential or commercial buildings. Vehicle and workshop monitoring: CO detection in garages, workshops, or enclosed vehicle service areas to trigger ventilation or worker alerts. Embedded systems and prototyping: Educational projects, Arduino/Raspberry Pi-based monitoring, and industrial control prototypes that require analog and digital gas signals. Installation and use notes Follow the recommended heating cycle voltages (1.5 V low-temperature detection and 5.0 V high-temperature cleaning) to maintain sensitivity and baseline stability. Use the analog output to measure concentration trends and the TTL output for threshold-based alarm actions. Mount securely using the four screw holes and ensure adequate airflow to the sensing element for accurate readings. What stands out Combined analog and TTL outputs for flexible integration Temperature-cycling method that balances sensitivity and self-cleaning Robust sensing material (SnO2) and practical mounting make it suitable for both consumer and lightweight industrial applications Compatibility and cautions Intended for use with standard microcontrollers and alarm circuits that accept analog voltage and TTL input. Do not expose the sensor to corrosive chemicals or extreme environments beyond the device specifications to avoid premature degradation.