Carbon Dioxide (CO2) Sensor for Home, 400-5000ppm

This CO2 sensor for home is a compact indoor air quality sensor for real-time carbon dioxide monitoring. It measures 400-5000ppm CO2 levels with 1ppm resolution and UART/PWM output for easy connection to smart home and HVAC systems. Suitable for bedrooms, living rooms, air purifiers, ventilation devices, and home environmental monitoring.

Feature

• SUCH CO₂ Sensor features a high-sensitivity detection design with a 400~5000ppm measurement range, enabling real-time monitoring of atmospheric carbon dioxide concentrations.
• Operating at low power consumption with an average current below 60mA, it supports 4.5V~5.5V DC power supply, meeting requirements for smart home and commercial applications.
• Compatible with both UART and PWM interfaces for multi-signal output, it integrates seamlessly into ventilation systems, air conditioners, or air monitoring modules.

Dimension (unit: mm)

PWM Output

• PWM period: 1004ms
• Calculation formula for obtaining the current CO2 concentrationvalue by PWM: Cppm=5000 x (TH-2ms)/(TH+TL-4ms)
• Cppm is the C02 concentration value obtained by the calculationin ppm.
• TH is the time when the output goes high in one output cycle.
• TL is the time when the output goes low in one output cycle.

Pin Definition

 

Pin	Description
Vin	Positive pole of power supply (Vin)
GND	Negative pole of power supply (GND)
PWM	PWM Output
HD	HD (Zero Calibration, low level valid for more than 6s)
RX	UART (RXD) TTL Data Input
TX	UART (TXD) TTL Data Output