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Par Meter

Discussion in 'General Plant Topics' started by ubr0ke, Jan 12, 2011.

  1. ubr0ke

    ubr0ke Prolific Poster

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  2. Biollante

    Biollante Lifetime Charter Member
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    See No Reason Why Not

    Hi,

    As long as it is water proof, I see no reason it should not work.

    Actually it looks kind of cool. :cool:

    Biollante
     
  3. ubr0ke

    ubr0ke Prolific Poster

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    The water proofing is a must of course. The price is nice and it can't weigh very much so shipping should be low.


    Biollante..Buy it and tell me how it works..hah
     
  4. Biollante

    Biollante Lifetime Charter Member
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    To Meter Or Not to Meter...

    Hi,

    Oddly enough I was going to suggest you do the same. :p

    I am pretty well invested in my Apogee meter and now sensors.

    Though to tell the truth, as far as I am concerned, the jury is still out on the usefulness versus cost and just what all the data mean. :confused:

    If you have a large operation, a dozen or so people to use it (share the cost, as in a club) or in addition to planted tanks you are a gardener especially with a greenhouse, I think I could recommend these products. :)

    In my ever-humble-potted-plant opinion, most people setting up a tank can probably better spend the money elsewhere.

    Biollante
     
  5. pepetj

    pepetj Lifetime Members
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    I'm concerned on four issues:

    1) Its real waterproofness, the manual states that water may go through the screws if in contact with water (p.3 "...irrigation water can gather in the screw holes, enter the unit and damage the circuit board")
    2) Also the lack of leveling will likely induce errors of measurements as far as I understand Quantum meters.
    3) This unit "measures" in ranges and only up to 30 mol*m(-2)*sec(-1).
    4) The reliability of the readings. How accurate are indeed the ranges measured?

    That said, for 90USD one unit, if a safe modification is found to ensure waterproofness, as a screening measure this looks interesting.

    Pepetj
    Santo Domingo
     
  6. Biollante

    Biollante Lifetime Charter Member
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    Apogee MQ-200

    Hi,

    I am pretty sure as far as the waterproofing goes, silicon aquarium goop should work.

    I am an Apogee MQ-200 quantum meter user. :rolleyes:

    Leveling and orienting to true north (or true south in the southern hemisphere) is an issue with the angle of the sun throughout the day in locations (mounted sensor) where information is being logged throughout a season or year. :gw

    Consistency in sensor orientation is an issue for repeatability, building and using a jig, part sensor mount, part story stick, part angle mount without affecting the reading.

    Using the jig, then reliably moving the sensor so that readings can be taken vertically to gain accurate point measurements at various levels to get repeatable measurement is trickier then it might seem.:confused: (Not unlike this sentence.:eek:)

    I find it easier to get proper readings in ponds and lakes then aquariums.:)

    Then correcting for the particular sensor is important. Knowing what part of the spectrum is over or underestimated.:eek:

    The LI-COR meters are more accurate and auto correcting and so forth, but are also much more expensive.

    Biollante
     
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