Waterproof CO2 Sensor, 400-5000ppm, UART Output

A SUCH waterproof CO2 sensor is an NDIR gas sensor used to detect carbon dioxide concentration in wet, humid, or outdoor conditions. This sensor provides 400-5000ppm CO2 measurement, 1ppm resolution, UART digital output, and a gold-plated waterproof chamber for long-term stable operation. It is suitable for greenhouse CO2 monitoring, smart farming systems, outdoor air quality devices, and car air purifiers.

Feature

• The smart carbon dioxide gas sensor integrates NDIR detection technology with optical and electrical circuits, achieving excellent selectivity and oxygen-independent operation.
• The carbon dioxide sensor's gas chamber features gold-plated treatment for waterproofing and corrosion resistance, ensuring immunity to moisture interference and preventing sensor poisoning.
• SUCH CO2 sensors offer high sensitivity, strong anti-interference capability, and support both digital and analog voltage outputs for user convenience.

Dimension (unit: mm)

Wiring Diagram (UART Communication Interface)

Pin Definition (Pin pitch: 2.54mm)

 

Pin	Description
01 Vout	Power output 3.3V, output current < 10mA
02 RXD	UART-RXD (Data input @3.3V)
03 TXD	UART-TXD (Data output @3.3V)
04 DAC	Analog voltage (Reserved)
05 HD	Zero calibration, low level valid for more than 7s
06 Vin	Voltage input 3.7V ~ 6V
07 GND	Ground terminal
08 AOT	Reserved
09 PWM	Custom (Reserved)