Description
The CJ-702-U is a high-precision PM2.5 air quality sensor engineered for real-time particulate detection in both indoor and outdoor environments. Using optical laser scattering technology and an onboard micro-fan, it delivers stable, high-sensitivity readings ideal for air purifiers, IoT environmental monitors, HVAC systems, and portable pollution detectors. With UART digital output and long operational life, it offers reliable integration into modern smart devices.
Key Features
- High-Sensitivity PM2.5 Detection: Measures fine airborne particles ≥2.5 µm.
- Laser Optical Sensing: Ensures precise and consistent particle measurement.
- UART Digital Output: Easy communication with microcontrollers and IoT devices.
- Built-In Fan: Ensures constant airflow for accurate sampling.
- Stable Signal Processing: Embedded algorithms reduce noise and fluctuation.
- Long-Life Operation: Designed for continuous 5+ year usage.
- Compact & Integrated Module: Ideal for space-constrained embedded systems.
- Plug-and-Play Design: Minimal external circuitry required.
Specification
- Model: CJ-702-U
- Detection Type: PM2.5 (Particulate Matter)
- Measurement Range: 0 – 999 µg/m³
- Accuracy: ±10% (typical conditions)
- Output Interface: UART (digital serial communication)
- Operating Voltage: 5V DC
- Current Consumption: ~100 mA (fan included)
- Response Time: ≤ 1 second
- Working Life: ≥ 5 years continuous
- Technology: Laser optical scattering with airflow control
- Dimensions: Approx. 45mm × 40mm (varies by casing)
Application
- Air purifiers and smart filtration systems
- IoT environmental monitoring nodes
- Smart home air quality devices
- HVAC optimization and ventilation control
- Indoor pollution tracking systems
- Portable AQI meters and wearable monitors
- Safety and environmental compliance systems