Where can I find a CO2 sensor that will allow me to measure the concentration in a small space?

I'm doing an experiment where I'll be burning a candle in a closed box, and measuring the concentration of the carbon dioxide in the air. I need to be able to record a value for the concentration of the CO2. What's the best way

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alexdy6 years ago
come to http://www.tongdy.com/english/product.asp, you will find various CO2 sensors that you need to measure the concentration of CO2 in a specific space. If you want more information, contact me by emailing to alex@tongdy.com at any time. Welcome!
lemonie8 years ago
How about here: http://www.futurlec.com/Gas_Sensors.shtml ?
You'd need to calibrate it also, not going to be easy really, so best wishes.

lemonie lemonie8 years ago
Click on the "Datasheet", but it's not go the right range, and it'll read CO too. See other comments below. (No easy answers) L
suvayanr (author)  lemonie8 years ago
How/ what do I hook that sensor up to in order to get a reading?
kelseymh8 years ago
Do you know what concentration you expect? Look for "CO2 sniffer" in Google, and one of the sponsored hits is to a company that sells portable (personal safety) montors that go down to 5 per mil (5000 ppm). They've also got analyzers (static samples, not continuous monitoring) up to 60%. You will find lots of other good hits, so you can evaluate price/performance/company-relability yourself.
lemonie8 years ago
Ah no that's no good, only goes up to 10,000ppm. Using an infra-red absorption technique might be better, but you've got other problems there... L