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

High-precision home CO₂ sensor with a measurement range of 400–5000 ppm, resolution up to 1 ppm, accuracy ±(50 ppm + 5%), and response time under 100 seconds. The sensor's 3.3V interface voltage is compatible with multiple control boards, featuring dual UART/PWM output signals. Ideal for smart home systems, air purifiers, and HVAC applications.

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