🦊

CO2 Sensor SCO2-1(SCD40)

Available For Purchase

Screek Store

https://shop.screek.io/products/sco2-1

eBay Store

https://www.ebay.com/itm/187926693560

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For Singapore, China, Hong Kong, Taiwan and Vietnam, the alternate choice is Taobao:

News

Title	Sensors	Date
🦥 CO₂ readings—a lovely curve.	SCO2-1SCO2-1SSCO2-30ENV-CP	Jun 29, 2026 10:42 PM
The World of CO2	SCO2-1SCO2-1SSCO2-30ENV-CP	Jun 24, 2026 4:09 AM
😇 Performance of the CO₂ sensor(SCO2-1, SCO2-1S, ENV-CP, SCO2-30)	ENV-CPSCO2-1SCO2-1SSCO2-30	May 9, 2026 12:49 PM

Name	Tags
🧛 [SCO2-1][Tips]Some custom cards that can be used for CO2 display	Cards
🦕 SCO2-1 No-ASC(automatic calibration) Version Firmware
🎇 SCO2-1 Shell Deviation Optimization
🪄 Daily CO₂ Observations
🪄 SCO2-1 And Env-CP Automatic Calibration, Manual Forced Calibration Guide	Guide
🪄 SCO2-1 Sensor Source Code
🪄 SCO2-1 Temperature and Humidity Properties of Carbon Dioxide Sensors Explained
🪄 [FAQ]It is safe to put sensor surface outside cover? It is not fragile and sensitive?	FAQ
🪄 CO2 Sensor SCO2-1 Released	News

Firmware

Beta Firmware

SCO2-1 Beta Firmware

Help

⛏️Fix firmware update failures

SCREEK CO2 Family Sensor Size Comparison

Thanks to everyone's help, we explored these highly specialized and fascinating CO2 sensor components from Switzerland and gained valuable insights about them. While we may not have detailed their dimensions earlier, here is a size comparison:

SCO2-30 (SCD30): 60.2 x 34.5 x 16.5mm
SCO2-1 (SCD40): 54.7 x 27.9 x 16.3mm
SCO2-1S (SCD41): 54.9 x 27.9 x 18.4mm
ENV-CP (SCD40 + SPS30): 56.0 x 47.1 x 30.6mm