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 reality_check
Demilitarized Psychonaut
 
Registered: 01/12/09
Posts: 152
Last seen: 4 years, 11 months
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 digital humidity gauge test . 
#9750330 - 02/06/09 03:24 PM (15 years, 2 months ago) |
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i have used digital humidity gauges in my snake cages for years. reading info on this site said that they were inaccurate. So I put 3 of my humidity gauges in the corner of my FC an left them in there all day. This is the results:
that is enough proof for me. Looks like its time to go shopping for some mechanical ones.
thanks for bringing it to my attention shroomery
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 West
Stranger
Registered: 01/02/09
Posts: 58
Loc: Highway 2 Heaven
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Re: digital humidity gauge test . [Re: reality_check]
#9750481 - 02/06/09 03:50 PM (15 years, 2 months ago) |
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I was curious if you can re calibrate them by remove replace batteries and wrapping them in a wet towel for a while ? By the way this a great teaching aid for potential digital hygrometer buyers!
Edited by West (02/06/09 03:57 PM)
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Shroominit
Part Time Mycologist
Registered: 11/29/08
Posts: 4,662
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Re: digital humidity gauge test . [Re: West]
#9750505 - 02/06/09 03:54 PM (15 years, 2 months ago) |
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Quote:
West said:
I was curious if you can re calibrate them by remove replace batteries and wrapping them in a wet towel for a while ?
Even if you do that, how will you know when it's out of calibration again?
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veda_sticks
Cultivator
Registered: 07/29/07
Posts: 14,191
Loc: UK 
Last seen: 4 years, 3 months
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Re: digital humidity gauge test . [Re: Shroominit]
#9750542 - 02/06/09 04:03 PM (15 years, 2 months ago) |
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I tested mine took some pictures but never wrote up on it.
I measured my living rh
soaked the external sensor in water to cleanm
dryied it on a heater
wraped it in damp towel for 1 hour - 96%
Read the rh of my living room again, and it was different by quite a bit.
--------------------
PF TEK - writeup by EvilMushroom666
Lets Grow Mushrooms - RogerRabbit & RoadKills website with sample videos plus the full PF TEK video series. Alot of great information - BUY THE DVD
Cakes can and will pin! - So you think cakes suck for pins. Your wrong
Franks Simple Coir/Verm Tek
Franks Proper Pasturisation Tek
Franks Spawning To Bulk - Monotub
Professor Pinheads RTV Injection Port Tek
Foo Mans No Soak WBS Prep Tek
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veda_sticks
Cultivator
Registered: 07/29/07
Posts: 14,191
Loc: UK
Last seen: 4 years, 3 months
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Re: digital humidity gauge test . [Re: veda_sticks]
#9750555 - 02/06/09 04:04 PM (15 years, 2 months ago) |
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Just had a thought, did you put fresh batteries in them??
--------------------
PF TEK - writeup by EvilMushroom666
Lets Grow Mushrooms - RogerRabbit & RoadKills website with sample videos plus the full PF TEK video series. Alot of great information - BUY THE DVD
Cakes can and will pin! - So you think cakes suck for pins. Your wrong
Franks Simple Coir/Verm Tek
Franks Proper Pasturisation Tek
Franks Spawning To Bulk - Monotub
Professor Pinheads RTV Injection Port Tek
Foo Mans No Soak WBS Prep Tek
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West
Stranger
Registered: 01/02/09
Posts: 58
Loc: Highway 2 Heaven
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Re: digital humidity gauge test . [Re: Shroominit]
#9750594 - 02/06/09 04:09 PM (15 years, 2 months ago) |
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Hopefully with your brand new shiny freshly calibrated analog hygrometer . Ebay has great glass faced bronze analog hygrometers for 5.00 including shipping I received mine within 5 days.
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Moe Caps
Please!
Registered: 02/02/09
Posts: 66
Loc: Estonia
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Re: digital humidity gauge test . [Re: West]
#9750814 - 02/06/09 04:33 PM (15 years, 2 months ago) |
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Thanks for doing this, I was a bit suspicious of my $12 Accurite lol. Good to see that the temps are the same 2/3. Already have an analog hygrometer that I will use in my FC so good stuff!
Almost got the one West^ is talking about but just ended up picking one up at a pet store for 6 bucks.
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Disclaimer: All posts made by Moe Caps are complete bullshit.
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veda_sticks
Cultivator
Registered: 07/29/07
Posts: 14,191
Loc: UK
Last seen: 4 years, 3 months
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Re: digital humidity gauge test . [Re: Moe Caps]
#9750856 - 02/06/09 04:38 PM (15 years, 2 months ago) |
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ACtually the temps arnt the same, while the current reading is only 1 degree out look at the min max on each guage
1 - 64 76
2 - 63-87
3 - 54-67
and the min max rh
1 - 46 99
2 - 48-99
3 - 43-88
I reckon the batteris are going in the 3rd one. Those work off of voltages, as the batteries run down the voltage drops and this can affect the readings
--------------------
PF TEK - writeup by EvilMushroom666
Lets Grow Mushrooms - RogerRabbit & RoadKills website with sample videos plus the full PF TEK video series. Alot of great information - BUY THE DVD
Cakes can and will pin! - So you think cakes suck for pins. Your wrong
Franks Simple Coir/Verm Tek
Franks Proper Pasturisation Tek
Franks Spawning To Bulk - Monotub
Professor Pinheads RTV Injection Port Tek
Foo Mans No Soak WBS Prep Tek
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RogerRabbit
Bans for Pleasure
Registered: 03/26/03
Posts: 42,214
Loc: Seattle
Last seen: 1 year, 1 month
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Re: digital humidity gauge test . [Re: veda_sticks]
#9751172 - 02/06/09 05:19 PM (15 years, 2 months ago) |
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Digital hygrometers are not suitable for upper 90% humidity. Moisture gets on the transducer and you can't trust the reading. They're not worth the hammer it takes to smash them to bits. Get mechanical hygrometers and calibrate weekly, because the damn things are all made in china now and only slightly less worthless than digitals.
RR
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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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reality_check
Demilitarized Psychonaut
Registered: 01/12/09
Posts: 152
Last seen: 4 years, 11 months
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Re: digital humidity gauge test . [Re: veda_sticks]
#9752869 - 02/06/09 10:49 PM (15 years, 2 months ago) |
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Quote:
veda_sticks said:
ACtually the temps arnt the same, while the current reading is only 1 degree out look at the min max on each guage
1 - 64 76
2 - 63-87
3 - 54-67
and the min max rh
1 - 46 99
2 - 48-99
3 - 43-88
I reckon the batteris are going in the 3rd one. Those work off of voltages, as the batteries run down the voltage drops and this can affect the readings
I replaced all the batteries in the last month. the temps you quoted are the high/low readings for the last 24 hours. I only had them in the chamber for 10 hours or so when i took the pic. before that they were in different snake racks. these units cannot be calibrated as far as i can tell.
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Juves
Stranger
Registered: 04/27/07
Posts: 19
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Re: digital humidity gauge test . [Re: RogerRabbit]
#9753640 - 02/07/09 06:10 AM (15 years, 2 months ago) |
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Quote:
RogerRabbit said:
Digital hygrometers are not suitable for upper 90% humidity. Moisture gets on the transducer and you can't trust the reading. They're not worth the hammer it takes to smash them to bits. Get mechanical hygrometers and calibrate weekly, because the damn things are all made in china now and only slightly less worthless than digitals.
RR
Yep, but the real truth is even worse. Putting a electronic meter in 99% RH is just a bit short from just submerging it in to water. 99% RH will penetrate every material that was used to make that digital meter and fuck up every component inside it. After a week, you cant really trust anything that meter says, all the electric components inside have absorbed so much water that the values are way off and recalibrating the meter can no longer help. Most of the cheap electronics was never designed to work long times at more than 60%-80% RH, you get what you pay for.
Actually, if you are using a digital meter inside fc or any place with above 90% RH, you should often move it to place with much lower RH, that way you crack the ceramic components and it goes dead. That way you realize how crappy those are and get some analog meters for this analog world. Well, unless you get very good digital one with outer probes and warranty that it works at 100% RH, but you shouldn't, unless it's a part of an automated system.
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Sebastien
Don't look!
Registered: 01/12/09
Posts: 759
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Re: digital humidity gauge test . [Re: Juves]
#9753691 - 02/07/09 07:14 AM (15 years, 2 months ago) |
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All this talk about how easy to mess up humidity gauges has got me worried. Are all computerized gauges prone to 'breaking' at one point? 
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Juves
Stranger
Registered: 04/27/07
Posts: 19
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Re: digital humidity gauge test . [Re: Sebastien]
#9753780 - 02/07/09 08:03 AM (15 years, 2 months ago) |
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Would you like to put your computer case in a large shotgun fc? If not, then I suggest that you keep your smaller computers away from smaller fc's too. The gauge probably needs to be designed to work under water for long periods of time to work reliably in fc conditions for years. One with good remote probe is best if you need digital meter.
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Stedanko
Butter Churner
Registered: 02/27/08
Posts: 269
Loc: Syracuse
Last seen: 10 years, 1 month
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Re: digital humidity gauge test . [Re: Juves]
#9753829 - 02/07/09 08:27 AM (15 years, 2 months ago) |
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I got an Exo-Terra digi rh meter and it has a remote probe that goes in the FC...thus not exposed to the high humidity levels, the thing has worked fine for months...and it DOES go up to 99%
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