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Mr. E
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PMP humidty
    #5886188 - 07/21/06 11:58 PM (17 years, 6 months ago)

grr i jsut got back from wally world with my hygrometer/thermometer put that into my pmp (perlite) and after waiting for an hour im still only at 84 degrees and 37 humidity.
37!

idk maybe im crazy, but i swear its mroe humid than that in there.


my pmp is fairly small, 14 x 9 x 11 in.

perlite is about 3 inches deep. and wat is jsut under that.
when i have the top open i hear the air bubbles coming up through the perlite, not too much, but i think its enough.

my airpump is an AQT 3001, only single output which i have a T connector for.

so basicaly, i know im not doign something right. up for any suggestions :laugh:


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Invisibleliamtheloser
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Re: PMP humidty [Re: the_END]
    #5886197 - 07/21/06 11:59 PM (17 years, 6 months ago)

try having your standing water only an inch deep, that should raise your humidity.


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Invisibleliamtheloser
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Re: PMP humidty [Re: liamtheloser]
    #5886201 - 07/22/06 12:01 AM (17 years, 6 months ago)

Oh, and also, perlite will take a bit longer than an hour to get to 100% humidity... try checking it tomorrow, don't open it!


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OfflineYamidude
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Re: PMP humidty [Re: liamtheloser]
    #5886209 - 07/22/06 12:03 AM (17 years, 6 months ago)

btw accurite hygrometers suck donkey balls


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Mr. E
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Re: PMP humidty [Re: liamtheloser]
    #5886213 - 07/22/06 12:04 AM (17 years, 6 months ago)

yea ive had the pumps on and the the thing shut for a day now actually but it wasnt until tonight when i was able to get a hold of the meters.

i shall try it with less water then?


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Mr. E
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Re: PMP humidty [Re: the_END]
    #5886223 - 07/22/06 12:07 AM (17 years, 6 months ago)

yamidude,
yea, i kind of figured that, especially coming from walmart.. but what can you do when you get there and notice you only have 10 bucks on yourslef and had to scrounge for 1 more lol.

but even if it does suck... is 37% insanely innacurate or is that a mistake of mine?


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Re: PMP humidty [Re: the_END]
    #5886237 - 07/22/06 12:11 AM (17 years, 6 months ago)

No, it's not that inaccurate.

Your humidity is low. It may be a DEFECTIVE product, but you could do a salt test to check that.


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OfflineYamidude
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Re: PMP humidty [Re: liamtheloser]
    #5886243 - 07/22/06 12:13 AM (17 years, 6 months ago)

yeah i doubt seriously it's THAT off. my accurite was 11% off though.


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Mr. E
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Re: PMP humidty [Re: liamtheloser]
    #5886253 - 07/22/06 12:17 AM (17 years, 6 months ago)

i doubt its defective.. so lets say its working perfectly, and tells no lies.

what would be some ways toget my humidity up? take out some water (which i will do tomorrow if i see no results over night) how bout a new air pump? mine is def. an older model and maybe it jsut isnt strong enough.

or possibly the bubblers? ill get a pic or lin kto them in a second.


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OfflineYamidude
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Re: PMP humidty [Re: the_END]
    #5886270 - 07/22/06 12:22 AM (17 years, 6 months ago)

Quote:

the_END said:
i doubt its defective.. so lets say its working perfectly, and tells no lies.

what would be some ways toget my humidity up? take out some water (which i will do tomorrow if i see no results over night) how bout a new air pump? mine is def. an older model and maybe it jsut isnt strong enough.

or possibly the bubblers? ill get a pic or lin kto them in a second.



you're not using bubblers? And I can ALMOST guarantee that it IS inAcurite


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Mr. E
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Re: PMP humidty [Re: Yamidude]
    #5886306 - 07/22/06 12:41 AM (17 years, 6 months ago)

no im using 2 bubbles... thes green circular ones, is the only way to describe right now i cant get a pic..gottem at walmart


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Invisibleliamtheloser
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Re: PMP humidty [Re: the_END]
    #5886311 - 07/22/06 12:44 AM (17 years, 6 months ago)

Bubble wands work much better in PMP's... Not to say those bubble stones wont work, just not as good.


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OfflineYamidude
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Re: PMP humidty [Re: liamtheloser]
    #5886320 - 07/22/06 12:50 AM (17 years, 6 months ago)

Werd, bubble wands oWn. You just need to wait a little bit buddy. Perlite alone will give you high 90%rh. Either your gauge hasn't caught up yet or it's fucked up..


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Mr. E
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Re: PMP humidty [Re: Yamidude]
    #5886325 - 07/22/06 12:54 AM (17 years, 6 months ago)

liam: it is a bubble wand.. had these 2 suction cups on either end, took those out and layed them flat across the tub .. jsut checked again, still at 37.


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Invisibleliamtheloser
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Re: PMP humidty [Re: the_END]
    #5886335 - 07/22/06 01:00 AM (17 years, 6 months ago)

Ahh, awesome. If you have perlite, water and bubble wands, you can bet your chamber will be 100% in 24 hours, unless you have giant unfiltered holes everywhere. even then it will be more than 37%.

I'd invest in a better hygrometer, or just go by intuition... intuition has been working for me ever since i dropped my hygro into a bubbling vat of h202... never check on your cakes when you're high :P


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Mr. E
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Re: PMP humidty [Re: liamtheloser]
    #5886385 - 07/22/06 01:24 AM (17 years, 6 months ago)

thanks for all the help guys, all update wahst goin on tomorrow
:laugh:

ps, never heard better advie liam... dont check while high hmm :rolleyes:


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OfflineCantiSama

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Re: PMP humidty [Re: the_END]
    #5886438 - 07/22/06 01:46 AM (17 years, 6 months ago)

calibrate your hygrometer with a little bit of salt: http://www.shroomery.org/index.php/par/7993

it works.


--------------------
Tiger got to hunt, bird got to fly;
Man got to sit and wonder 'why, why, why?'
Tiger got to sleep, bird got to land;
Man got to tell himself he understand.


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InvisibleWIZOLZ
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Re: PMP humidty [Re: CantiSama]
    #5887029 - 07/22/06 09:23 AM (17 years, 6 months ago)

Just a word of advise. Poke small pin size holes in those cheap bubble wands before they clog up, unless of coarse, perilite is moderately protective against matter buildup. I disliked having to take my PMP apart and clean it during a fruiting cycle I had going once.


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Requim for a Dream - Paul Oakenfold
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"The mis/abuse of any form of power, is the worst form of ignorance"
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WIZOLZ - Lover with a Killer's Smile


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Offlinepizzatonite
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Re: PMP humidty [Re: WIZOLZ]
    #5887096 - 07/22/06 10:07 AM (17 years, 6 months ago)

I've got a question, is the humidity sensor on the outside sensor, or is it located in the body of the hygrometer/thermometer. From your pic it looks like you leave it outside your pmp.


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OfflineTestv4n
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Re: PMP humidty [Re: pizzatonite]
    #5887108 - 07/22/06 10:14 AM (17 years, 6 months ago)

Quote:

jyipzy said:
I've got a question, is the humidity sensor on the outside sensor, or is it located in the body of the hygrometer/thermometer. From your pic it looks like you leave it outside your pmp.




Exactly what I was thinking, my temp sensor is wireless but the humidity sensor is housed in the base-unit itself.


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Re: PMP humidty [Re: liamtheloser]
    #5887110 - 07/22/06 10:14 AM (17 years, 6 months ago)

Quote:

liamtheloser said:
don't open it!




+1


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Offlineunkempt
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Re: PMP humidty [Re: FooMan]
    #5887174 - 07/22/06 10:47 AM (17 years, 6 months ago)

Just to let u know its not inaccurate...i use the same one...the thing is THE HUMIDITY METER IS FOR "INSIDE" lol.....you have to remove it and extend the humidity thing to inside the box lol...pix...




that should fix yer problems


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Invisibleliamtheloser
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Re: PMP humidty [Re: unkempt]
    #5887191 - 07/22/06 10:53 AM (17 years, 6 months ago)

ahahahaah, i didn't even SEE THAT!!! hahahaha

yeah, put the whole unit into the FC, doh!


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Mr. E
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Re: PMP humidty [Re: liamtheloser]
    #5887652 - 07/22/06 01:58 PM (17 years, 6 months ago)

hahahaha omg omg
wow ok ill put the whole damn thing in haha


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Offlineunkempt
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Re: PMP humidty [Re: the_END]
    #5887692 - 07/22/06 02:13 PM (17 years, 6 months ago)

just to let u know if u put that whole thing in its gunna go out in a few weeks...atleast my first one did since its made for "inside" use i just opened it and extended the humidity sensor and left the setup outside of my fc and put the 2 sensors inside of it


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Mr. E
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Re: PMP humidty [Re: unkempt]
    #5887724 - 07/22/06 02:21 PM (17 years, 6 months ago)

yea im going to do that in a bit too... but as of now... it decided to just say "hi" as soon as it reached 90% humidity?

edit: my post got cut off wtf?


Edited by the_END (07/22/06 02:22 PM)


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Offlineunkempt
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Re: PMP humidty [Re: the_END]
    #5887836 - 07/22/06 03:09 PM (17 years, 6 months ago)

yea on that one anything over 90% is "hi"


Edited by unkempt (07/22/06 03:09 PM)


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Mr. E
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Re: PMP humidty [Re: unkempt]
    #5887868 - 07/22/06 03:24 PM (17 years, 6 months ago)

alright, jsut extened the humidity sensore and now everything is setup... even though it says Hi, is my humidity actualy high enough?

bc all i am sure of is my humidity is 90%<


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Re: PMP humidty [Re: the_END]
    #5888047 - 07/22/06 04:23 PM (17 years, 6 months ago)

If it says high, you'll be doing just fine :laugh:  The perlite ALONE will keep it around 95, when you add the bubble wands, that'll keep it ~100% no problem.


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Re: PMP humidty [Re: liamtheloser]
    #5888055 - 07/22/06 04:26 PM (17 years, 6 months ago)

I've got a tip for you.

Take that hygrometer and baseball-bat it across the yard.

See all the water droplets forming on the sides of the tub? There's your new humidity indicator. :smile:


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Re: PMP humidty [Re: Hoss]
    #5888066 - 07/22/06 04:32 PM (17 years, 6 months ago)

Water droplets have very little to do with humidity levels.. That's condensation... That's caused by temperature difference... It's warmer INSIDE the FC, therefore the water droplets form on the inside... whereas a can of cola will form water on the OUTSIDE of the can, because it's warmer on the OUTSIDE.


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Invisibledecepticon
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Re: PMP humidty [Re: liamtheloser]
    #5888074 - 07/22/06 04:36 PM (17 years, 6 months ago)

condensation actually lowers the humidity inside.

Hoss, you are wrong.
good call liam.

the condensation also will breed bacteria and obviously
it robs moisture from the air, hense the lower humidity.

Raise the temp outside the fc.


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Re: PMP humidty [Re: decepticon]
    #5888168 - 07/22/06 05:13 PM (17 years, 6 months ago)

> Water droplets have very little to do with humidity levels..

Arrgh... Do a bit of research into humidity vs. temp and condensation. I'll save the physics lesson for later.


-FF


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Re: PMP humidty [Re: fastfred]
    #5888176 - 07/22/06 05:17 PM (17 years, 6 months ago)

So the water droplets are an indication of 100% humidity? because my FC's never have water droplets but are at 100% all the time... what are you saying freddy


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Re: PMP humidty [Re: liamtheloser]
    #5888226 - 07/22/06 05:37 PM (17 years, 6 months ago)

heat around FC raised.. i will check on condesnsation in a bit


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Re: PMP humidty [Re: liamtheloser]
    #5888230 - 07/22/06 05:38 PM (17 years, 6 months ago)

Yes, when the surface of the terrarium is cooler than the air on the inside of the terrarium, condensation occurs. However, condensation also occurs when the water vapor capacity of the air is exceeded.

When the temperature of the air falls to, or below the dew point temperature, the condensation of excess water vapor occurs.

At the dew point, your relative humidity will be 100%. I would consider condensation to be a fairly reliable indicator of relative humidity.



Edited by Hoss (07/22/06 05:45 PM)


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Invisiblemonstermitch
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Re: PMP humidty [Re: Hoss]
    #5888327 - 07/22/06 05:59 PM (17 years, 6 months ago)

:popcorn:


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Re: PMP humidty [Re: monstermitch]
    #5889535 - 07/23/06 01:22 AM (17 years, 6 months ago)

> what are you saying freddy

Thanks for the explanation Hoss.

The water holding capacity of air is directly related to the temperature. If you have condensation that means you have 100% RH at the surface of the walls.

If your walls are the same temp as the FC and you have condensation you have 100% RH in your FC. If the walls are cooler then you have 100% RH on the surface of the walls, but since the FC is warmer you will have less than 100% RH at the center of the FC.

If your inside/outside temp is stable and the same then condensation is a good indicator of RH. If you temp keeps changing this will cause condensation on the walls at less than 100% RH, and will reduce the humidity in the FC.

So if you have a stable temp then condensation is a great indicator of RH. 1-2 degrees is no big deal and will cause condensation when the walls hit the dew point of the RH in your chamber.

The only time condensation is not a good indicator of RH is when the FC is significantly warmer than the temp of the room.


-FF


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Re: PMP humidty [Re: fastfred]
    #5889700 - 07/23/06 03:39 AM (17 years, 6 months ago)

Thanks for the backup Fred :wink:.


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