Posted by liai on 3/3/2004, 7:41 pm159.226.96.142 I want to use 3.4um IR LED to make ethanol sensor . So, should I use the cooler? Message Thread: If I use IR LED, I must use cooler? - liai 3/3/2004, 7:41 pm Re: If I use IR LED, I must use cooler? - Fred Perry 3/5/2004, 11:34 am « Back to thread
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