DIY PAR meter, Yeah you heard me - Page 24 - The Planted Tank Forum
 
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post #346 of 733 (permalink) Old 05-25-2012, 08:34 PM Thread Starter
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Let us know how the 'cup' version works out.

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post #347 of 733 (permalink) Old 05-26-2012, 02:32 AM
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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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post #348 of 733 (permalink) Old 05-26-2012, 02:36 AM Thread Starter
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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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post #349 of 733 (permalink) Old 05-26-2012, 04:22 AM
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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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post #350 of 733 (permalink) Old 05-26-2012, 04:26 AM
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"Somebody" got busy with the solder again- only 10 more to go!


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post #351 of 733 (permalink) Old 05-26-2012, 04:42 AM
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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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post #352 of 733 (permalink) Old 05-26-2012, 04:46 AM Thread Starter
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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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post #353 of 733 (permalink) Old 05-26-2012, 04:48 AM Thread Starter
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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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post #354 of 733 (permalink) Old 05-26-2012, 05:05 AM
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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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post #355 of 733 (permalink) Old 05-26-2012, 05:23 AM
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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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post #356 of 733 (permalink) Old 05-26-2012, 05:44 AM Thread Starter
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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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post #357 of 733 (permalink) Old 05-26-2012, 07:23 AM
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seeing this make me miss the old days
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post #358 of 733 (permalink) Old 05-26-2012, 03:20 PM
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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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post #359 of 733 (permalink) Old 05-26-2012, 03:35 PM
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ok, readings with the old bulbs are about 10PAR less on both
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post #360 of 733 (permalink) Old 05-26-2012, 03:39 PM Thread Starter
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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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