Temperature and humidity meter
Login
User Name
Password   


Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Sponsor
Donate Now
and become
Forum Supporter.

Temperature and humidity meter
Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
  #1  
Old 01-08-2021, 11:02 PM
Orchidtinkerer Orchidtinkerer is offline
Senior Member
 

Join Date: Sep 2020
Posts: 441
Temperature and humidity meter
Default Temperature and humidity meter

Hello everyone,
I wanted to start a topic on temperature and humidity meters. I think it is an under-reported subject. I know when it comes to sensors you can get manual and digital ones. Then you can get high precision and budget ones.
I've seen some people say that budget ones are not worth it - maybe but I think this century sensors have become better than they used to be and cheaper. The high precision ones will always be very expensive.

I started as probably many did with a thermopro monitor like this one Amazon.com

but after owning it and comparing it to others I have decided it is the slowest to react to changes and the most inaccurate sensor I have.

I have tried these Amazon.com

they are very good value and accurate but they are rather small and don't have a max -min storage

the best one I have tried and wanted to share with you today is this one Amazon.com

It has max-min values, a very sharp display, seems accurate and responsive to changes, my favourite budget monitor I have tried so far.

I'm not affiliated with any of these, I just thought I'd share my findings since I know lots trust the number 1 best seller which to me is the most inaccurate one and it is hard to know out of the other 1000's of chinese brands which ones to trust.

I cannot comment on how they would last with water or very high humidity. I've heard people break theirs if they get them wet too much which I suppose can be an issue with any sensor and maybe a manual one would be better suited.

The manual ones can be more reliable than the digital ones and don't use any batteries so there is plenty of good choices but also plenty of bad ones out there.

I recently tried a weather station that had all unnneeded additional features, barometer, alarm, usb phone charger and an animated screen but the sensors were rubbish which to me is the most important, some people just want something nice to look at since it only had glowing reviews.

Hope this helps someone.

Happy growing.

Last edited by Orchidtinkerer; 01-08-2021 at 11:06 PM..
Reply With Quote
Post Thanks / Like - 3 Likes
  #2  
Old 01-09-2021, 12:11 AM
SouthPark's Avatar
SouthPark SouthPark is offline
Senior Member
 

Join Date: Dec 2018
Member of:AOS
Location: Australia, North Queensland
Posts: 4,712
Default

I haven't used temperature and/or humidity sensors for my plants before. But I do like to tinker with sensors. I ordered some HCZ-H8-B humidity sensors just a moment ago, after reading your post ----- and planning to see how these perform ----- as in see how long they just keep working for.

For temperature measurements ----- the waterproof version of the ds18b20 might be ok. The ones housed in a cylindrical metal can thing.
Reply With Quote
  #3  
Old 01-09-2021, 07:58 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Member of:AOS
Location: Oak Island NC
Posts: 13,015
Temperature and humidity meter Male
Default

Orchidtinkerer, your choice looks like a decent one, assuming they're reasonably accurate.

Last June I bought this one from Govee, also through Amazon, at another grower's recommendation, and it seems pretty solid, too.

For remote monitoring that I can monitor from my phone, I am a big fan of the Sensorpush line, although they are a lot more expensive.
__________________
Ray Barkalow, Orchid Iconoclast
FIRSTRAYS.COM
Reply With Quote
Post Thanks / Like - 1 Likes
Likes Fuerte Rav liked this post
  #4  
Old 01-09-2021, 11:19 AM
WaterWitchin's Avatar
WaterWitchin WaterWitchin is offline
Super Moderator
 

Join Date: Feb 2011
Zone: 6a
Location: Kansas
Posts: 3,931
Default

Interesting. I have two of the very first one you showed OrchidTinkerer. Had for years. I think perhaps I'll get the third one you show, or Ray's latest and give one a whirl. I used to use them mainly for the humidity reading because I wasn't worried about temperature that much.

In my new grow space, low temps are a concern if my heater goes out. (Formerly were in basement, which never got cold enough to actually kill anything even if heater went on the fritz.) I like the idea on Ray's of being notified on my cell if it goes outside a preset range.
Reply With Quote
  #5  
Old 01-09-2021, 02:33 PM
Orchidtinkerer Orchidtinkerer is offline
Senior Member
 

Join Date: Sep 2020
Posts: 441
Temperature and humidity meter
Default

Ray yours looks amazing and so cheap.

From what I have gathered there seem to be two different kind of humidity sensors, the old fashioned type had a +-5% discrepancy and the new ones have a +-3% accuracy. They seem to be faster to pick up changes than 5% accurate ones too.

I will see if I can find a govee here. Good find
Reply With Quote
  #6  
Old 01-10-2021, 08:01 AM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Member of:AOS
Location: Oak Island NC
Posts: 13,015
Temperature and humidity meter Male
Default

When I first got out of school, we did a lot of investigation around how ambient conditions can affect a molten ceramic at 2000C, so knowing the water content of the air was pertinent.

Back then, the humidity was best measured with a sling psychrometer (probably still is), but a certified gauge was a reasonable substitute, and the sensor consisted of human hair that would shrink or elongate with the RH.

Nowadays, there are capacitive (metal oxide between metal electrodes; the capacitance changes with RH), resistive (similar mechanical setup, using a salt in between metal electrodes; conductivity of the salt changes) and thermal, where the conductivity of two identical pieces of metal are compared, one being in dry nitrogen.

My guess is that all of the less-expensive ones we get are the salt conductivity type, as they are cheap and donít require the constant recalibration of the capacitive ones.
__________________
Ray Barkalow, Orchid Iconoclast
FIRSTRAYS.COM
Reply With Quote
Post Thanks / Like - 2 Likes
Likes Fuerte Rav, Chemtiger liked this post
  #7  
Old 01-12-2021, 08:03 AM
Orchidtinkerer Orchidtinkerer is offline
Senior Member
 

Join Date: Sep 2020
Posts: 441
Temperature and humidity meter
Default

right I got myself a govee too and I am happy with the responsiveness, screen is just average, ie in the wrong light it is hard to read but that is minor.

What I am abit annoyed about trying to set it up is that they want to know my location, my phone number and my email address before I can set up the home app. This was not mentioned anywhere and why do they need all my info?
Is this correct? The app I downloaded and all I could find was only downloaded 200 times so something doesn't seem right...

I was going to post a side by side comparrison after letting them set for an hour but I want to know if I have downloaded the right app now so here is a quick picture of what you can expect after 10 minutes. Note these will not be accurate measurements as the meters need to adjust first but it gives you a good idea, most are withn +-5% - now look at the thermopro (the white one on the right). More than 20% off on humidity and it takes over an hour to change by like 10%
Attached Thumbnails
Temperature and humidity meter-img_5943-jpg  
Reply With Quote
  #8  
Old 01-12-2021, 09:17 AM
camille1585's Avatar
camille1585 camille1585 is offline
Administrator
 

Join Date: Oct 2007
Location: middle of the Netherlands
Posts: 13,173
Default

Quote:
Originally Posted by Orchidtinkerer View Post
What I am abit annoyed about trying to set it up is that they want to know my location, my phone number and my email address before I can set up the home app. This was not mentioned anywhere and why do they need all my info?
Is this correct? The app I downloaded and all I could find was only downloaded 200 times so something doesn't seem right...
Try getting to the app directly from the website. That way you are sure to have the brand's app, and not some knockoff. I'm paranoid and usually do that when I need the app for a product. I just tried it for govee, and they have one app for all their products called govee home, with 500k+ downloads...(Android version)
__________________
Camille

Completely orchid obsessed and loving every minute of it....

My Orchid Photos
Reply With Quote
Post Thanks / Like - 2 Likes
Likes WaterWitchin, Chemtiger liked this post
  #9  
Old 01-12-2021, 09:49 AM
Orchidtinkerer Orchidtinkerer is offline
Senior Member
 

Join Date: Sep 2020
Posts: 441
Temperature and humidity meter
Default

Final results after settling for one hour
Attached Thumbnails
Temperature and humidity meter-img_5946-jpg  
Reply With Quote
Post Thanks / Like - 2 Likes
Likes WaterWitchin, camille1585 liked this post
  #10  
Old 01-12-2021, 10:03 AM
WaterWitchin's Avatar
WaterWitchin WaterWitchin is offline
Super Moderator
 

Join Date: Feb 2011
Zone: 6a
Location: Kansas
Posts: 3,931
Default

Things that make ya say Hmmmmmm. Gonna get a Govee and give this a whirl!

---------- Post added at 09:03 AM ---------- Previous post was at 09:01 AM ----------

Okeydoke! Should be here Thursday!
__________________
Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.
Reply With Quote
Post Thanks / Like - 1 Likes
Likes camille1585 liked this post
Reply

Bookmarks

Tags
budget, humidity, manual, people, sensors


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Phal - issues with fertilizer, pots, and environment, mainly - just issues... acaldwell3590 Beginner Discussion 45 09-23-2017 01:13 AM
Rel. Humidity vs dew point nogreenthumbs Beginner Discussion 6 06-19-2017 09:17 PM
Temperature and humidity meters Selmo Parts & Equipment 8 03-12-2016 03:09 PM
Growing Phals in a growth chamber with temperature, lighting and humidity control OzPhal Hybrids 1 05-10-2011 01:10 AM

All times are GMT -4. The time now is 11:32 PM.

© 2007 OrchidBoard.com
Search Engine Optimisation provided by DragonByte SEO v2.0.37 (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.

Clubs vBulletin Plugins by Drive Thru Online, Inc.