Tks

Here you are wrong… Calibrating a hygrometer with salt, specifically using a saturated salt solution, is a common method, but it has its limitations. Here are some reasons why it might not be accurate: 1. **Environmental Variations**: Temperature and air pressure can influence the humidity level, which can affect the calibration process. 2. Volume of container matters, the smaller the better as there might not be enough time to saturate the air inside if volume of it is too big. In order for this to work somewhat accurate you need to have the temperature at around 25 Celsius. There is a reason why airports give humidity readings with temperature/dew point not relative humidity. The reason is because as air gets hotter it can contain more water vapour before it becomes saturated (100%). If it is colder the air gets denser and cannot hold as much vapour as there is no room for water molecules. So in order for you to have an accurate reading you need your temp to be 76F or 25C. You cant control pressure but using only temp will get you close enough. Watch a video on relative humidity vs dew point and you will get the picture.

Surprisingly nobody talking about temperature it's super important to have a temperature... make sure when you do humidity test your environment supposed to be 70%

It's not pronounced hyDROmeter! *hy GRO meter*

do not fall , it will kill the LCD and Zebra connector

Here are my finding on the subject of humidity. Humidity is directly affected by temperature. Ever notice when its cold out you have a higher humidity reading versus when its warm/hot the humidity is lower? When it is hot there is less moisture in the air. When its cold more moisture. I have played the game of chasing dialing in hygrometers. IMHO its a waste of time. Buy Boveda packs with the humidity % you want, and call it done. Even Boveda states on the back of their 10 pack of 60g, 65% packs the range is 60-69%.

Bro Tupperware would’ve been fine in a closet

middle button, 75%, doesn't seem to do anything... Are there really Digital Hygrometer that ment to be callibratet at all !?

1.11.....normal salt.

This works with pretzel salt

Merhaba Mükemmel Uygulama Aynı Formülü Kullanmaktayım..

Use distilled water

Lol, other videos say 8-12 hours!

I don’t understand why mine isn’t working. The humidity keeps dropping every time I put it in the ziplock bag. Like wtf? I take it out and it says 65… I put it in the bag with the salt and it drops to 54…

1:37 so salt in the container will make the humidity in it exactly 75%, and we compare it with the actual reading on the hygrometer, and since it shows 71%, does that mean we have to offset it with +4% ?

Warning! A better way: fill the tub with thin layer of water, add enough salt so that no more salt dissolves, then add still somemore salt. Use the cap as a platform and put your hygrometer on it. If you fill the cap with salt and water, there is just no enough surface area for equilibrium to be reached after 24 hrs.

i did that and it stoped at 60% after 24hs, after that i place in a tupperware with a small container full of just hot water and it went to 69% after a few hours, could i ve got a faulty hygrometer ? very strange that i cant get it to pass 70%

useless

Hi Grow Meter....LMAO

"in 2019, this list helped me decide for the best humidity monitor *scafe.shop/tbhm2019?nZ* hope it helps you out too!"

don't the digital hygrometers come calibrated already

Is this traceable to NIST???

Why can't you have free standing water on top? I believe as long as there's undissolved salt at the bottom humidity equilibrium will be reached

how much space can one bottle cap with salt "cover"? What should be the volume of the zip bag or container?

Learn to spell your own language, mr. cigar man

will it work with sea salt?

What sort of accuracy for humidity is required for cigars?

For information the salt solution should have some liquid solution on top of the salt. This will be a saturated salt solution and will adsorb moisture if the atmospheric relative humidity is above 75%.

For those that asked why this works, and how to get more accuracy: In pure water the molecules, energized by their temperature, jump into the air until the rate at which they jump into the air (fighting against their Van der Waals attraction to the other water molecules in the liquid phase) and fall back into the liquid are equal, which depends on the density of water molecules in the air. (The more water molecules in the air the more likely they will hit the water and stick. That rate has to equal the rate of leaping off.) That fixes the relative humidity, for pure water that is 100% RH. The water molecules in the salt paste are bound by much stronger Van der Waals forces to the salt molecules. It is harder for them to leap into the air. Lower density of water molecules in the liquid phase balances the rate at which they leap into the air (due to thermal energy fluctuations). if there is a higher density of water molecules in the air then they will land more than they leap until the two rates are equal, and similarly if there is less than the equilibrium value. If you wait long enough, and it may take a while since the surface area of the paste is very small compared to the size of the container, the RH will reach the equilibrium value determined by the degree of binding of the water molecules to that particular salt at that temperature (and perhaps pressure.) For each type of salt the molecular binding / Van der Walls force is different and that causes a different relative humidity (at the same temperature). There may be other forces involved than Van der Waals. Some water molecules are probably bound by strong dative / covalent bonds to some salts (even some dry salts have water molecules in their crystals), but in a paste others may be glued by Van der Waals. My guess would be only the weaker bound water molecules contribute to the RH. For example MgCl salt gives about 33.3% RH and Na,2Cr20 gives about 55% RH at room temperature. NaCl is just over 75.5%. (pure water = 100% RH, desiccators could give 0% RH). It would make sense if you can only calibrate one value to pick one near the desired RH. nvlpubs.nist.gov/nistpubs/jres/53/jresv53n1p19_a1b.pdf What I do is use several references and put marks on less expensive analog meters to show the correct values. For digital meters that don't calibrate, or if you want accurate values over a larger range, you can make a table of the true readings vs. the nominal readings. If you want high accuracy, the reading can change quickly when you open the bag. For analog meters you can remember where to put the mark. For digital meters you can hit the buttons through a flexible bag. I have read in some places that you should not calibrate some digital meters. However I don't think digital meters with calibration work differently than ones that don't have built in calibration, and I can't imagine how it could harm a digital meter to stick it in a bag with known RH.

According to this US government study, from 15 deg C to 42 deg C it's closer to 75.5% or higher, with a max of 75.8% at 25 deg C. From 20 - 35 deg C (covering most room temperatures) it would be more accurate to set 76% if you can't do tenths. I know this makes absolutely no difference for this particular application, but for anyone wanting more accuracy: nvlpubs.nist.gov/nistpubs/jres/53/jresv53n1p19_a1b.pdf

I'm ignorant. Why does this method give exactly 75% of humidity, not less, not more ?

HY GROM EAT ERR

can i use this test with analog hygro???

I have two xikar non adjustable hygrometers. I did a standard salt test on them,and they were off. I called xikar,and they said the standard standard salt test was wrong.

my instruction manual tells me to take my brain out before calibration :O

It is best to wait between 4 to 24 hours.

Good Fellas Cigars, you had a pronounciation error on the word "hygrometer". You said the humidity was around 82%. You turned right to make it read 75%. Turning left will bring the humidity up, for example let's say the humidity was 66%. You turn left. Pronounciation error: "hy-gro-mee-ter". Correct pronounciation: "hy-groh-meter".

Good Fellas Cigars, you didn't pronounce the word "hygrometer" correctly. You also forgot to press the "Calibrate" button on your hygrometer. It read 71%! Pronounce it like this: "hy-groh-meter". Not like this: "hy-gro-mee-ter"! :)

thank you for the information but my hygrometer is too big can i use big sealed container 30x20x20 cm if yes for this container i have to use only cap amount salt and water? or i have to get jar head to fill with water and salt?

That's not how you do it. You put the analog Hygrometer into a wet cloth and leave it there for 1 hour. Now the hygrometer is supposed to show 100 % humidity obviously. If not, adjust it to 100%. And that's it.

Hi-grom-iter :)

If I have a Hygrometer that has 3 buttons 1) C/F (Celsius &Fahrenheit) 2) Min/Max 3) Reset what would I press after 24 hours in the container with the salt paste?

OK three easy questions. 1) In the first step for the base reading, do you close the humidor or leave it open for those 10 minutes? 2) By my count, there are 4 bead tubes used in this process? Two on the bottom level, two on the top? 3) In reading the comments, it's unclear if I'm supposed to hydrate the first two bead tubes? You explicitly mention that on the ones on the top but not for the ones on the bottom. Other than that, great video, been looking for something like this - thanks!

Why do I feel like starting up smoking now? Is this the hygrometer that most dentists use?

okay , thanks anyway missle :)

send it back! if you we're talking about maybe a 3%-4% difference then I wouldnt care, but that much difference? Somethings bad with your Hygro! Happens every day!

there is no button to calibrate in my digital hygrometer.. Iam also have do the "salt test" before , and the results was 99% RH... so what can i do man?

po-tay-to, po-tah-to. Look it up.

I was watching a tv show and it said kafjdifaidfj

Troloolololololol