DIY PAR meter, Yeah you heard me - Page 24
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Old 05-25-2012, 07:34 PM   #346
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Let us know how the 'cup' version works out.
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Old 05-26-2012, 01:32 AM   #347
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How water tight are the first batch of sensors? It's not like I'll leave it in a tank more than a few minutes between uses.
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Old 05-26-2012, 01:36 AM   #348
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It's watertight. The cup is sealed with silicone. If it leaks in you can see it and fix it yourself.
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Old 05-26-2012, 03:22 AM   #349
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just got the meter today and ofcourse tried it right the way. but have one question, how should i hold the sensor ? if i hold it bottom up the readings are way to high for my light so looks like horizontal position is way to go. it gives more sensible readings. any tips?
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Old 05-26-2012, 03:26 AM   #350
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"Somebody" got busy with the solder again- only 10 more to go!


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Old 05-26-2012, 03:42 AM   #351
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Quote:
Originally Posted by wintu View Post
just got the meter today and ofcourse tried it right the way. but have one question, how should i hold the sensor ? if i hold it bottom up the readings are way to high for my light so looks like horizontal position is way to go. it gives more sensible readings. any tips?
Jealous, I won't get mine for at least another week! Darn customs... Darn countries and borders!

Mistergreen, maybe you could show us a few photos of how to use the meter?
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Old 05-26-2012, 03:46 AM   #352
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Quote:
Originally Posted by wintu View Post
just got the meter today and ofcourse tried it right the way. but have one question, how should i hold the sensor ? if i hold it bottom up the readings are way to high for my light so looks like horizontal position is way to go. it gives more sensible readings. any tips?


What lights do you have? What were the readings? How far away is the sensor to the light source?

It's a good chance you do have high readings.
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Old 05-26-2012, 03:48 AM   #353
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Quote:
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Jealous, I won't get mine for at least another week! Darn customs... Darn countries and borders!

Mistergreen, maybe you could show us a few photos of how to use the meter?
Yup, I had to fill out a customs form for your package.

I should print out a 1 page instruction with each package too.
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Old 05-26-2012, 04:05 AM   #354
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my light is fishneedit 2x24 sitting on top of 14 high tank and reading are: at the surface (2.5") about 240 and sustrate level (12.5")about 120 . using bottom up method
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Old 05-26-2012, 04:23 AM   #355
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Quote:
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Yup, I had to fill out a customs form for your package.

I should print out a 1 page instruction with each package too.
I really appreciate that. Hopefully it wasn't a lot of inconvenience. You and O2 have really helped me out.
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Old 05-26-2012, 04:44 AM   #356
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my light is fishneedit 2x24 sitting on top of 14 high tank and reading are: at the surface (2.5") about 240 and sustrate level (12.5")about 120 . using bottom up method
These are t5 bulbs? That sounds on the money. Do you have algae issues?
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Old 05-26-2012, 06:23 AM   #357
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seeing this make me miss the old days
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Old 05-26-2012, 02:20 PM   #358
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These are t5 bulbs? That sounds on the money. Do you have algae issues?
no algae issues which is kind of surprising because i think with 120 PAR on the substrate would be a algae farm. according to this thread http://www.plantedtank.net/forums/li...ants-need.html this light is T5NO and its got really bad reflectors so thats why is so strange to see PAR like this. i will also try to put in old bulbs to see if there is any change . (curently using GE starcoat 6500k)
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Old 05-26-2012, 02:35 PM   #359
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ok, readings with the old bulbs are about 10PAR less on both
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Old 05-26-2012, 02:39 PM   #360
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It sounds right. Bulb brand have different outputs, some much stronger than others.
I'm not sure what bulb brand they tested that's why those par charts are misleading. I found that out the hard way.
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