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kinkyllama
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Registered: 04/30/06
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hydrometer/humidity Qs
#5636257 - 05/16/06 02:15 AM (17 years, 8 months ago) |
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I'm trying to get my PMP set up before I start anything else and am having problems with humidity. I have a 125gallon air pump running two bubble wands, 3 1/2" hydroton with water 1" from the top of it, two small holes in the top of a 40qt box. The temp is at about 82degrees and my analog hydrometer shows 85-90% humidity if I leave the top on long enough and doesn’t go higher after that. I don’t think I'm doing anything wrong... my gauge also read the same with a 60gallon pump so I'm wondering if my gauge isn’t very accurate. How else can I know what the humidity is? Or is there am accurate gauge I can get without spending allots? There is so much condensation that it is almost dripping... Though I know it’s because the temp difference. I read that a gauge won’t read accurately if there’s condensation, should I turn the heat off and let the condensation go away so my gauge might read correctly?
Any advice is appreciated, Danny
*Edit: One other thing, How do you guys keep your air pumps cool? Mine is pretty hot. I have it in a box with polyfill to filter the air which probably makes it even hotter since it doesnt get much air. I turned off my heater a couple hours ago and let the pod air off/cool out and since the air pumps so hot the temp inside the pod is still 80-81degree compared to about 77outside the box.
Edited by kinkyllama (05/16/06 02:31 AM)
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RogerRabbit
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Re: hydrometer/humidity Qs [Re: kinkyllama]
#5636462 - 05/16/06 05:53 AM (17 years, 8 months ago) |
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Mechanical hygrometers are made to be adjusted. How did you go about calibrating it? RR
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Anonymous
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Post deleted by Anno [Re: kinkyllama]
#5636468 - 05/16/06 05:56 AM (17 years, 8 months ago) |
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kinkyllama
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Re: hydrometer/humidity Qs [Re: ]
#5637270 - 05/16/06 12:36 PM (17 years, 8 months ago) |
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Quote:
RogerRabbit said: Mechanical hygrometers are made to be adjusted. How did you go about calibrating it? RR
oh, so uh, how do I calibrat it? lol. I assumed it came calibrated.
Quote:
werdnaeroom8 said: You really dont need the hygrometer/humidity gauge. Usually it gives you some BS non accurate information anyways. Just know that with a PMP setup your humidity should be ideal for growing mushrooms, thats whaT ive been told and go by. as long as its bubbling out of the wands and they stay submerge it should be fine, keep the wands on 24/7 also. I dont even think you need to poke holes in the actual chamber because the PMP setup provieds the proper FAE and Humidity already
What about too much humidity? I only need like a 10 or 20 gallon pump and I went with a 125 cuz I plan on getting a bigger chamber after my first yeild.
I put two small holes in the lid for gas exchange
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euphrates
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Re: hydrometer/humidity Qs [Re: kinkyllama]
#5637357 - 05/16/06 12:53 PM (17 years, 8 months ago) |
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id go with a digital one. a bit more expensive but more accurate and easier to use.
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RogerRabbit
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Re: hydrometer/humidity Qs [Re: euphrates]
#5637376 - 05/16/06 12:58 PM (17 years, 8 months ago) |
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Digital ones are shit. Anything over 90%, they simply read 'hi'. You want to get a mechanical hygrometer and calibrate it. Wrap in a damp towel for half an hour, then unwrap and adjust the screw on the back so the dial reads 98%. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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kinkyllama
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Re: hydrometer/humidity Qs [Re: RogerRabbit]
#5638001 - 05/16/06 03:21 PM (17 years, 8 months ago) |
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Quote:
RogerRabbit said: Digital ones are shit. Anything over 90%, they simply read 'hi'. You want to get a mechanical hygrometer and calibrate it. Wrap in a damp towel for half an hour, then unwrap and adjust the screw on the back so the dial reads 98%. RR
How accurate will that make the gauge? Thanks for the info!
Edited by kinkyllama (05/16/06 03:24 PM)
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HippieChick
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Re: hydrometer/humidity Qs [Re: RogerRabbit]
#5638091 - 05/16/06 03:44 PM (17 years, 8 months ago) |
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Quote:
RogerRabbit said: Digital ones are shit. Anything over 90%, they simply read 'hi'. You want to get a mechanical hygrometer and calibrate it. Wrap in a damp towel for half an hour, then unwrap and adjust the screw on the back so the dial reads 98%. RR
Not so RR . My digital reads up to 99%.
 Peace,Love,Happiness and Harmony Hippie Chick
-------------------- Peace,Love and Happiness HC Freedoms just another word for nothing left to lose.............. I LUV My Greenhouse http://www.shroomery.org/forums/showflat.php/Number/5545848#5545848 My First Pans http://www.shroomery.org/forums/showflat.php/Number/6212058#6212058
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RogerRabbit
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Re: hydrometer/humidity Qs [Re: HippieChick]
#5638517 - 05/16/06 05:25 PM (17 years, 8 months ago) |
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Lucky you. I went through four or five and they either read 'hi' or '8888' after a week or two.
The mechanical hygrometers from a cigar shop will cost ten bucks and as long as you calibrate them monthly, will be very accurate. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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HippieChick
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Re: hydrometer/humidity Qs [Re: RogerRabbit]
#5638611 - 05/16/06 05:53 PM (17 years, 8 months ago) |
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I'm gonna be getting some mechanical myself . I was just pointing out that some digitals do read up to 99% . I've been using those Taylors for over a year now with no problems. They all salt tested within 1% of 75% also . 
Peace,Love,Happiness and Harmony Hippie Chick
-------------------- Peace,Love and Happiness HC Freedoms just another word for nothing left to lose.............. I LUV My Greenhouse http://www.shroomery.org/forums/showflat.php/Number/5545848#5545848 My First Pans http://www.shroomery.org/forums/showflat.php/Number/6212058#6212058
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Anonymous
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kinkyllama
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Re: hydrometer/humidity Qs [Re: ]
#5639037 - 05/16/06 07:25 PM (17 years, 8 months ago) |
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I'm still trying to calibrate my gauge.. its hard to move the needle and takes like 5-10mins to get it into place.. then i put it back into the cloth cuz its been out so long that it probably lost its touch then it starts reading high again at around 120-140% and I've done this like 10times now.
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RogerRabbit
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Re: hydrometer/humidity Qs [Re: kinkyllama]
#5639073 - 05/16/06 07:35 PM (17 years, 8 months ago) |
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You need a very small screwdriver, but it helps to have a large handle on it so you can make fine adjustments. See if you can wrap the handle with masking or electrical tape to give it a bigger diameter to make fine adjustments easier. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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kinkyllama
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Re: hydrometer/humidity Qs [Re: RogerRabbit]
#5640020 - 05/16/06 10:46 PM (17 years, 8 months ago) |
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Quote:
RogerRabbit said: You need a very small screwdriver, but it helps to have a large handle on it so you can make fine adjustments. See if you can wrap the handle with masking or electrical tape to give it a bigger diameter to make fine adjustments easier. RR
I have a small one.. it fits perfectly but you have to move it just right.. then you have to move it from ~130% to like 40% just to get it to move to 125%. When I finally get it back to 97% I put it back in the moist towel to make sure its work and it goes back up to 130%
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RogerRabbit
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Re: hydrometer/humidity Qs [Re: kinkyllama]
#5640077 - 05/16/06 10:55 PM (17 years, 8 months ago) |
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Sounds like you might have a defective one. RR
-------------------- Download Let's Grow Mushrooms semper in excretia sumus solim profundum variat "I've never had a failed experiment. I've only discovered 10,000 methods which do not work." Thomas Edison
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trentallica
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Re: hydrometer/humidity Qs [Re: RogerRabbit]
#5640117 - 05/16/06 11:03 PM (17 years, 8 months ago) |
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you need a hygrometer made for high relative humidity ( RH)levels. most home and garden hygrometers range from about 20-70% RH. if you cant find a range then dont get it. you can find them on ebay for not that much. if it is sauna hygrometer then that is perfect. think about saunas get right up to 100% RH.
-------------------- The only ones for me are the mad ones..........
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kinkyllama
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Re: hydrometer/humidity Qs [Re: trentallica]
#5640625 - 05/17/06 01:17 AM (17 years, 8 months ago) |
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Quote:
trentallica said: you need a hygrometer made for high relative humidity ( RH)levels. most home and garden hygrometers range from about 20-70% RH. if you cant find a range then dont get it. you can find them on ebay for not that much. if it is sauna hygrometer then that is perfect. think about saunas get right up to 100% RH.
I'm looking at either one made for cigars or one for a sauna. The cigar one is cheaper and much much smaller. How are the cigar ones compared to reptile and sauna gauges?
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cappa
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Re: hydrometer/humidity Qs [Re: kinkyllama]
#5641023 - 05/17/06 07:19 AM (17 years, 8 months ago) |
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Most of the cheap digi hygrometers use the cheaper 20%-90% rh sensors. That's why they don't work for our application. What's worse, they have poor reliability, and probably aren't calibrated very accurately at that. Taylor 1458's use a better sensor and have a resistor bus to 'tune/calibrate' the circuit. I haven't seen any way for the other manufacturers to calibrate the cheaper units at all. The automation device I'm working on uses the HS15P sensor from GE Thermometrics. 20-99%. It costs more, but it's required to have any sort of accuracy and reliability in our application.
I'm sitting next to a prototype here and the sensor has been doing the 'salt test' for 3 days now. It says that its: 11100111 rH right now. 
Unfortunately the resistance isn't linear to the rH.. That would have been nice. Yeehaw for tables and arrays!
*Goes back into his code hole*
-------------------- Their are 10 types of people. Those that understand binary, and those who don't. ~Cappa.
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slipperyPete
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Re: hydrometer/humidity Qs [Re: cappa]
#5641628 - 05/17/06 11:41 AM (17 years, 8 months ago) |
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This one is alright, but Radioshack is no longer going to carry them so you have to find them in store.
http://www.radioshack.com/product/index....rentPage=search
-------------------- read everything
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trentallica
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Re: hydrometer/humidity Qs [Re: kinkyllama]
#5647008 - 05/18/06 04:51 PM (17 years, 8 months ago) |
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pass on the cigar ones. when was the last time you saw a humador at 90% RH? stick with the sauna one. in my opinion
-------------------- The only ones for me are the mad ones..........
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