The Planted Tank Forum - View Single Post - Convert Lux meter to PAR meter?
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post #164 of (permalink) Old 04-23-2013, 05:02 AM Thread Starter
Planted Tank Guru
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,015
Originally Posted by jerrytheplater View Post
Is this the meter you are offering for sale here?:

I just bought one from you and did not see this thread till now.
Yes, this is the PAR meter you bought. As I make more of these the mechanics of doing it get a bit easier so they tend to be more nearly exact duplicates. It is still difficult to get the photodiode mounted at exactly the same distance from the diffuser, so I am finding that I have to tweak the diffuser filter selections a bit at times. When all goes well I use the same 2 diffuser filters in all of them. (The meter calibration is done by choosing diffuser filters which also change the total amount of light passing through them.)

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