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Adafruit SCD-40 - True CO2, Temperature and Humidity Sensor - STEMMA QT / Qwiic

Marsoni M251S
Sale price$63.00
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Adafruit SCD-40 - True CO2, Temperature and Humidity Sensor - STEMMA QT / QwiicThe SCD 40 is a photoacoustic "true" CO2 sensor that accurately measures the concentration of carbon dioxide (CO2) in ambient air. Unlike sensors like the SGP30, which approximate CO2 levels from VOC gas concentration, the SCD 40 directly measures CO2 in parts per million (PPM), making it a reliable tool for environmental sensing, air quality monitoring, scientific experiments, and ventilation studies. While it is larger and more expensive than some
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4.7 ★★★★★
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Kassidi
Grantham, US
★★★★★ 5
Lots of storage but compact look
Color: Mocha Brown
I was looking for something for my corporate 9-5 and was over a tote bag. This is perfect! It fits so much without it feeling or looking bulky. Love the amount of storage it has and I think it would even be a good travel bag
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 13, 2026
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Verified Purchase
Kari
Lowell, US
★★★★★ 1
Defective
Super cute bag, unfortunately it was less than functional. The main zipper cannot zip up completely, as it has been sewn incorrectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 17, 2025
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Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Leather Backpack
Great backpack for the price. It’s not too bulky and it’s stylish.
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Reviewed in the United States on January 8, 2026
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Lala29
Grantham, US
★★★★★ 3
My bag strap pulling out.
Color: Camel, Color: Camel
I got this bag as a gift from July and started using it in the middle of September for work. I love it but the left strap is pulling off. I am very disappointed.
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Reviewed in the United States on September 28, 2025
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Verified Purchase
Gator
Whiting, US
★★★★★ 5
Looks great and comfortable
Color: Mocha Brown
Perfect for a business situation and still convenient since it’s a backpack
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Reviewed in the United States on September 18, 2025

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