Sensirion SCD40

Name: Sensirion SCD40
Brand: Sensirion
SKU: scd40

Sensirion · scd40

SensirionView vendor page

Identifier

scd40

Sensirion SCD40 miniaturized photoacoustic NDIR CO2 sensor with integrated temperature and humidity sensing. Measures CO2 in the range of 400-2000 ppm at specified accuracy, with a 0-40000 ppm output range. Communicates via I2C at fixed address 0x62.

Pinout

Pin	Type	Function	Voltage
VCC	power	Supply voltage, 2.4V-5.5V; use a clean, stable 3.3V or 5V rail with enough peak-current margin	3.3
GND	ground	Ground
SDA	i2c	I2C data line; I2C address 0x62
SCL	i2c	I2C clock line

Explore other component groups

Air quality

Choose between MQ gas sensors, VOC/eCO2 indoor-air sensors, true CO2 modules and particulate sensors without treating every air-quality breakout as the same detector.

Sensors · Gas & air-quality sensors · 29 parts

Temp and humidity

DHT11, DHT22/AM2302, and DHT20/AHT20 sensors solve the same broad job, but only some are acceptable substitutes in the same circuit.

Sensors · Environment sensors · 19 parts

Environment sensors

Choose between temperature-only, temperature/humidity, pressure and indoor air-quality modules without treating every environmental sensor as a drop-in substitute.

Sensors · Environment sensors · 8 parts

Distance sensors

Compare compact I²C time-of-flight breakouts with industrial LiDAR modules without treating range, field of view, voltage or protocol as interchangeable.

Sensors · Distance sensors · 5 parts