Are PAR meter's expensive ? - The Planted Tank Forum

 
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post #1 of 10 (permalink) Old 02-05-2013, 03:17 AM Thread Starter
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Are PAR meter's expensive ?

Im sorry if this should be in the lighting thread.
Ive always assumed that PAR meters are very expensive , which is why hardly anybody owns one. A quick look on Amazon is showing them from $30 + , am i looking at the wrong things or what ?

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post #2 of 10 (permalink) Old 02-05-2013, 03:26 AM
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Hi stevenjohn21,

Those inexpensive ones seem to be lux meters. A quality PAR meter by Apogee Insturments with a waterproof sensor costs about $379.00.

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post #3 of 10 (permalink) Old 02-05-2013, 03:29 AM
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post #4 of 10 (permalink) Old 02-05-2013, 03:29 AM Thread Starter
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I figured it had to be the wrong item. What about a PAR meter without a waterproof sensor, would they be a lot cheaper ?

“We didn’t underestimate them. They were just a lot better than we thought.” -Bobby Robson

“Football is a simple game; 22 men chase a ball for 90 minutes and at the end, the Germans win.” -Gary Linekar

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post #5 of 10 (permalink) Old 02-05-2013, 03:31 AM
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Re: Are PAR meter's expensive ?

Check out the seneye... Pretty cool and doubles as a PAR meter

Gm

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post #6 of 10 (permalink) Old 02-05-2013, 04:07 AM
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I have a seneye, it was working great, until I got a mac...
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post #7 of 10 (permalink) Old 02-05-2013, 04:15 AM
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Quote:
Originally Posted by IWANNAGOFAST View Post
I was on top of the world, it was going great, until I got a mac...
Fixed that for you,

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post #8 of 10 (permalink) Old 02-05-2013, 04:58 AM
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Hoppy's got a DIY PAR sensor thread somewhere.
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post #9 of 10 (permalink) Old 02-05-2013, 06:29 PM
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Although I have not joined a local club, which I should, that's how a lot of people get their hands on one. Their club has one and once you get involved, you are able to borrow it. Another option is to rent one but you will find they have an insanely high deposit, which makes sense because that's how much the things cost.

I haven't looked into DIY options myself but they do exist. My main reason for not doing so is it's a bit overwhelming, especially if you haven't used a real one before and have nothing to compare to. I may make a DIY par meter at some point but I feel I need to at least have a popular light fixture to compare it too. I do have one but I would have to replace the bulbs, making it not too cost effective to me at the moment.
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post #10 of 10 (permalink) Old 02-05-2013, 10:53 PM
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Here's Hoppy's thread about converting a Lux meter into a cheap PAR meter: Convert Lux meter to PAR meter?

You can also use the Lux meter in open air .. NOT in water .. to get an idea of the PAR for your fixture and to find the optimal height it needs to be for your situation (such as if you want high light or low light). You take the lux reading and divide by 76 to get PAR. Then add about 10% more due to the slight focusing effect of the air to water interface. The Mastech Lux meter on Amazon runs about $15-20.
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