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FooMan



Registered: 02/02/05
Posts: 8,957
Loc: Earth
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Quote:
liamtheloser said: don't open it!
+1
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Quick WBS Prep
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unkempt
Im unkempt

Registered: 05/21/06
Posts: 219
Last seen: 2 years, 4 months
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Re: PMP humidty [Re: FooMan]
#5887174 - 07/22/06 10:47 AM (17 years, 6 months ago) |
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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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liamtheloser
Advanced Idiot

Registered: 06/07/06
Posts: 1,453
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Re: PMP humidty [Re: unkempt]
#5887191 - 07/22/06 10:53 AM (17 years, 6 months ago) |
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ahahahaah, i didn't even SEE THAT!!! hahahaha
yeah, put the whole unit into the FC, doh!
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the_END
Mr. E



Registered: 07/05/06
Posts: 241
Last seen: 6 years, 4 months
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hahahaha omg omg wow ok ill put the whole damn thing in haha
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unkempt
Im unkempt

Registered: 05/21/06
Posts: 219
Last seen: 2 years, 4 months
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Re: PMP humidty [Re: the_END]
#5887692 - 07/22/06 02:13 PM (17 years, 6 months ago) |
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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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the_END
Mr. E



Registered: 07/05/06
Posts: 241
Last seen: 6 years, 4 months
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Re: PMP humidty [Re: unkempt]
#5887724 - 07/22/06 02:21 PM (17 years, 6 months ago) |
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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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unkempt
Im unkempt

Registered: 05/21/06
Posts: 219
Last seen: 2 years, 4 months
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Re: PMP humidty [Re: the_END]
#5887836 - 07/22/06 03:09 PM (17 years, 6 months ago) |
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yea on that one anything over 90% is "hi"
Edited by unkempt (07/22/06 03:09 PM)
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the_END
Mr. E



Registered: 07/05/06
Posts: 241
Last seen: 6 years, 4 months
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Re: PMP humidty [Re: unkempt]
#5887868 - 07/22/06 03:24 PM (17 years, 6 months ago) |
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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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liamtheloser
Advanced Idiot

Registered: 06/07/06
Posts: 1,453
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Re: PMP humidty [Re: the_END]
#5888047 - 07/22/06 04:23 PM (17 years, 6 months ago) |
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If it says high, you'll be doing just fine 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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Hoss
Stranger


Registered: 06/13/05
Posts: 297
Last seen: 12 years, 1 month
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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.
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liamtheloser
Advanced Idiot

Registered: 06/07/06
Posts: 1,453
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Re: PMP humidty [Re: Hoss]
#5888066 - 07/22/06 04:32 PM (17 years, 6 months ago) |
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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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decepticon
someone abovethe crowd

Registered: 07/10/06
Posts: 113
Loc: europa
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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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fastfred
Old Hand



Registered: 05/17/04
Posts: 6,899
Loc: Dark side of the moon
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> 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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liamtheloser
Advanced Idiot

Registered: 06/07/06
Posts: 1,453
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Re: PMP humidty [Re: fastfred]
#5888176 - 07/22/06 05:17 PM (17 years, 6 months ago) |
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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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the_END
Mr. E



Registered: 07/05/06
Posts: 241
Last seen: 6 years, 4 months
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heat around FC raised.. i will check on condesnsation in a bit
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Hoss
Stranger


Registered: 06/13/05
Posts: 297
Last seen: 12 years, 1 month
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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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monstermitch
Growing in Bags Doesn't Work


Registered: 02/10/06
Posts: 3,911
Loc: Arizona Bay
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Re: PMP humidty [Re: Hoss]
#5888327 - 07/22/06 05:59 PM (17 years, 6 months ago) |
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fastfred
Old Hand



Registered: 05/17/04
Posts: 6,899
Loc: Dark side of the moon
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> 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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Hoss
Stranger


Registered: 06/13/05
Posts: 297
Last seen: 12 years, 1 month
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Re: PMP humidty [Re: fastfred]
#5889700 - 07/23/06 03:39 AM (17 years, 6 months ago) |
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Thanks for the backup Fred .
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