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A comment on Decreased CO2 during breathwork: emergence of altered states of consciousness. Parent comment

Re:Decreased CO2 during breathwork: emergence of altered sta... by malfist on Thursday April 17, 2025 @09:16PM (#43723976)
I don't get why they're so expensive. You can buy the ndir co2 sensor on AliExpress for around $10. And yet they want $180 for that thing. And measuring humidity and barometric pressure is a component that costs $4 or $5 for you or I to buy.
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Re:Decreased CO2 during breathwork: emergence of altered sta... by ivm on Thursday April 17, 2025 @11:20PM (#43724684)
Quality CO₂ sensors are pricey. I previously had two from AliExpress, but both were unreliable and eventually broke. I finally got an Aranet4, and it’s been flawless for over a year so far.
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Re:Decreased CO2 during breathwork: emergence of altered sta... by brians on Friday April 18, 2025 @10:09AM (#43728255)
They’re not using a $10 sensor. They’re being very careful which $40 sensor they use. And they’re calibrating the rest of the device to produce an accurate reading across its range.
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