Air Quality Monitor (PM 2.5, Formaldehyde, Temperature Humidity Sensor)

A multifunction air quality monitor that measures particulate matter (PM2.5), formaldehyde concentration, temperature, and humidity. It uses laser scattering to detect suspended particles in the air, an electrochemical probe for formaldehyde detection, and an integrated sensor for temperature and humidity readings.

The sensor outputs data via serial interface at 9600 bps and operates at 3.3V logic levels, making it compatible with most microcontrollers. Its six-sided shielding design provides high anti-interference performance, and the air inlet/outlet direction can be adapted to different enclosure designs.

Key Features

• PM2.5 Detection – Laser scattering measurement for particles 0.3–10µm
• Formaldehyde Sensor – Electrochemical probe, 0–1 mg/m³ effective range
• Temperature Sensor – -20°C to 99°C range, ±0.5°C accuracy
• Humidity Sensor – 0–99% range, ±2% accuracy
• Fast Response – Total response time ≤10 seconds
• Zero False Alarm Rate – Reliable real-time readings
• Six-Sided Shielding – Patent structure for high anti-interference performance

Specifications

• Operating Voltage – 5.0V DC
• Active Current – 100mA
• Standby Current – ≤200µA
• Interface Level – 3.3V logic (L <0.8V, H >2.7V)
• Baud Rate – 9600 bps (default)
• Particle Range – 0–500µg/m³ (effective), up to 2000µg/m³ (max)
• Particle Resolution – 1µg/m³
• Minimum Particle Size – 0.3µm distinguishable
• Counting Efficiency – 50% at 0.3µm, 98% at ≥0.5µm
• Operating Temperature – -10°C to +60°C
• MTTF – ≥3 years
• Weight – 50g
• Dimensions – 50 × 38 × 21mm

Ideal For

• Indoor air quality monitoring stations
• Environmental sensing and data logging
• Smart home air quality systems
• HVAC and ventilation monitoring

Package Contents

• 1× Air Quality Monitor sensor
• 1× 8-pin cable
• 1× PM2.5 adapter board