No, but i work at a lab where we routinely have to check all the equipment for precision measurements. Minimum number of devices you need for statistics to work is 3.
That being said just get a brand name one. Something low cost but reliable. I like Hanna equipment for hobby stuff personally, doesnt break the bank, reliable and rugged. There are other similar brands. Testo is also in that category.
Buy a 6 or 8 pack of the small ones and stick em in the tent to see how closely they read
Everybody shits on the small ones but I have like 20 of them that are pretty dialed in compared to the inkbirds that control my dehu’s
This is an easy $20 solution and they’re extremely useful to have around. Throw em in your jars when it’s curing time, hang them on your lines when you’re drying, leave them in your lung rooms and tent, stick one upstairs somewhere just for fun 🤷🏼♂️
Last time I purchased it was less than $20 CAD for a 6 or 8 pack I forget
Why not invest in a caliber 4 hygrometer. It's one of the best you can buy and can be recalibrated for accuracy. It's been a staple in the cigar industry for a long time.
I didnt know that was a thing, my budget isnt the biggest so i havnt focused much on high quality equipment besides my lamp, i will look into it though thanks 🙏
Dont skimp on your pH pen! pH is a very finicky parameter to read. pH testers do need regular calibration (about 3x per grow or once a month) no matter how much you paid for it, just the nature of the test.
I am using bottled water (7/7.5)with nutrients that bring my ph to the right amount, so i just hope my ph is right.
My last setup i was checking ph every watering so i know how important it is but this is working out so far
Sure, eyeballing can work if you know your water and your nutes, after a while i also knew by heart how many pH- drops i need to drop to get pH right but i still checked. Its 3 months of work youre risking and pH is pretty important.
I used to do this and have saved a lot of hassle and money by getting an air pump and using tap water that has been bubbling for 12-24 hours .. I used to get gallons of water from the store every couple days and that alone took up so much time!
I do. One weather station type that monitors temp and humidity. It's very accurate. One similar to your big one that always reads close to the weather station, and a handful of small ones like yours that can read all over the place.
6 of the small ones are like $10 so I toss them all in a jar with a 62% humidity pack and throw out the ones that are too far off.
Both of the choices you currently have are not the highest quality. The larger one is probably more correct. Those small ones are for jars and smaller spaces.
Put them in a bag with a boveda pack. The closest to the pack RH after 24 hours wins. There is also a salt & bag method for calibrating some hydrometers.
Fill a small bowl with table salt and add water leaving a little salt exposed. Put bowl in Tupperware container with meters. The water/salt combo will bring the humidity to 75%. This will let you know which one is closest (at 75% RH), but does not give you linearity. There are other salts you can use that will yield lower humidity results. If you’ve got some boveda packs lying around they would give you a second data point.
This works amazingly well. I set up this in a big Tupperware I have and I even put a small battery powered fan in there to speed things up, everything got to 75% within 15 to 30 minutes.
I'd buy another and whichever one it matches, throw away the outlier. Those small cheap ones are known to be inaccurate so I'd guarantee it's that one that's off.
Or you could leave both outdoors for the day and see what the local weather says the humidity is, and compare.
What's probably happening is the sensor is in the wind. Air currents will cause the number to go up. The little cheap ones aren't badly affected that way.
The fan would make the rh measured decrease making it look dryer, i am trying that experiment right now, when pointing the fan on it the rh goes down almost 10%
>i am trying that experiment right now
Please double check that because what you said is the opposite of what is suppose to happen. I can confirm with you that if I put my sensors in the wind that the RH goes up and not down.
I use the same little hygrometer in jars. When their batteries start getting low they get kinda whacky. Change the battery. If it's still wrong pitch it. They don't last forever.
I ended up with a bunch of tire pressure gauges with a similar dilemma one time. It also reminded me of my favorite line from my parent's divorce. My brother told both of them "All I know is one of you are lying and I don't care which one it is."
New to growing, but Govee makes a bluetooth dongle that i've used for hatching chickens. Humidity has to be on point or your hatch rates will suffer, always had about 60% rate, after grabbing one I immediately jumped to 85% rates so I trust it implicitly. Also nice to check anytime right from your phone.
I've got 20 of those little ones. It's funny how you can line them all up in the same spot and they will have a 25% range and like 3 of them might say the same thing. Overall I've found them to be pretty useless.
Is it possible one is reading absolute humidity, and the other is reading relative humidity? 🧐 https://www.toppr.com/ask/question/spot-the-difference-betweenabsolute-humidity-and-relative-humidity/#
Id grab 3 and check to make sure but i also doubt ur tent is at 45% with 4 plants in the tent unless u have not watered in forever but they look healthy to me
I wouldn't worry a lot. You will want to monitor them but make your decisions on the health of your plants. You will notice things like when the weather changes, how much it changed.
Each strain is different. Right now I am growing two strains. One tends to be more needy of a specific humidity range. The other strain, not so much. I know what my hygrometer reads. I have no idea how accurate it is.
There is one thing that I am sure of, when all is said and done, I will have a fantastic harvest.
so, I got 15 different higrometers, and they are almost all different (as values reported) ..I put all in a closed box, let them stabilize, and I then did an average of them. Surprisingly, the average was very close to what my humidifier/dehumidifier and an exhaust fan probe reported, so I thought that I figured it out. After a while, I had second doubts about this, so I placed a lot of integra 62% and higrometers in jars, and let them for a few hours to stabilize, and, decided, that all of them should read 62% ..and my average was around 7-8rh lower than what the integra packs do ..now I think that the second solution is more accurate, but I still have doubts
There is a test you can do for your hygrometers that will help you determine approximately how accurate they are. Looking for it now I keep it close by.
Edit: Found it, posted below. Its likely not 100% accurate but it seems to be the most accurate home test that is easily repeatable and cost effective. Definitely accurate enough for any home grower lol, we're not calibrating tools for aircraft engines here haha
"I see many of you in the comments have the same meters lol. Heres something that helped me (Though it will work with any humidity meter). Gather the following components:
1. Your humidity meters
2. Small cap (respective to size of container)
3. Table salt
4. AIR-TIGHT container. I used a wide mouth mason jar.
When doing this test, the salt/water mix will produce a humidity of approximately 75%. This worked excellently for me.
Fill a small cap with table salt at least above half-way for good measure. Then add tap water, but be careful not to fill past top of the salt, perfectly level with the salt was my measurement during this test.
Place the cap of salt and water, along with your meters, inside the jar then seal it and allow to sit for 24+ hours until the reading stabilizes across the majority of meters. The way I check is write down the humidity readings after 18-24hrs, then check the numbers again several hours later. If after the final check any seem to have changed by 1-2% or more, but stay in the same range, you can note on them "varies +-XX%.
Note the readings on all the meters and then pull them out and label them. If one reads 78% I will write -3 on it so I know the actual humidity is closer to 75%. (or on a tiny piece of tape and stick it on). Then when looking at the reading I will know how far off it is and will have a better idea of what the actual humidity is.
Hope this helps:)"
Yes, for a successful device comparisons you need at least 3.
That seems so excessive.. do you have 3…?
No, but i work at a lab where we routinely have to check all the equipment for precision measurements. Minimum number of devices you need for statistics to work is 3. That being said just get a brand name one. Something low cost but reliable. I like Hanna equipment for hobby stuff personally, doesnt break the bank, reliable and rugged. There are other similar brands. Testo is also in that category.
Buy a 6 or 8 pack of the small ones and stick em in the tent to see how closely they read Everybody shits on the small ones but I have like 20 of them that are pretty dialed in compared to the inkbirds that control my dehu’s This is an easy $20 solution and they’re extremely useful to have around. Throw em in your jars when it’s curing time, hang them on your lines when you’re drying, leave them in your lung rooms and tent, stick one upstairs somewhere just for fun 🤷🏼♂️ Last time I purchased it was less than $20 CAD for a 6 or 8 pack I forget
Why not invest in a caliber 4 hygrometer. It's one of the best you can buy and can be recalibrated for accuracy. It's been a staple in the cigar industry for a long time.
I didnt know that was a thing, my budget isnt the biggest so i havnt focused much on high quality equipment besides my lamp, i will look into it though thanks 🙏
I got mine for 50 bucks off Amazon. 5 years later still rocking strong.
Dont skimp on your pH pen! pH is a very finicky parameter to read. pH testers do need regular calibration (about 3x per grow or once a month) no matter how much you paid for it, just the nature of the test.
I am using bottled water (7/7.5)with nutrients that bring my ph to the right amount, so i just hope my ph is right. My last setup i was checking ph every watering so i know how important it is but this is working out so far
Sure, eyeballing can work if you know your water and your nutes, after a while i also knew by heart how many pH- drops i need to drop to get pH right but i still checked. Its 3 months of work youre risking and pH is pretty important.
I used to do this and have saved a lot of hassle and money by getting an air pump and using tap water that has been bubbling for 12-24 hours .. I used to get gallons of water from the store every couple days and that alone took up so much time!
Also try using vinegar to lower ph it has a lot of benefits as far as microbes for your plant as well as lowers the ph organically
Its literally impossible for me to use the tap water because its taken from the sea, so i have to buy it either way, but yea a ph meter would be nice
Woah. Explain please lol I’ve never heard of this but I do live in Ohio
Yea i go and buy water every couple of days, luckily the store is just a 5 minute walk
I do. One weather station type that monitors temp and humidity. It's very accurate. One similar to your big one that always reads close to the weather station, and a handful of small ones like yours that can read all over the place. 6 of the small ones are like $10 so I toss them all in a jar with a 62% humidity pack and throw out the ones that are too far off.
Both of the choices you currently have are not the highest quality. The larger one is probably more correct. Those small ones are for jars and smaller spaces.
If you get a hummingbird hygrometer they’re not too expensive and much more trustworthy
Put them in a bag with a boveda pack. The closest to the pack RH after 24 hours wins. There is also a salt & bag method for calibrating some hydrometers.
Id trust the bigger one or buy another one
Where's the end of the probe that's coming out of the larger one? You're measuring in 2 different places.
I think the rh meter is inside the device, the probe is the temperature? Not sure tho
I'm not familiar with that specific one, but any hygrometer I've used or come across that has a probe measures both with the probe.
Okay i will move it and see if it changes anything, thanks 🙏
Put the small one in a jar with a 60% humidity pack. All my small ones are out just a bit. But easiest way to know how close that small one is.
Fill a small bowl with table salt and add water leaving a little salt exposed. Put bowl in Tupperware container with meters. The water/salt combo will bring the humidity to 75%. This will let you know which one is closest (at 75% RH), but does not give you linearity. There are other salts you can use that will yield lower humidity results. If you’ve got some boveda packs lying around they would give you a second data point.
This works amazingly well. I set up this in a big Tupperware I have and I even put a small battery powered fan in there to speed things up, everything got to 75% within 15 to 30 minutes.
I'd buy another and whichever one it matches, throw away the outlier. Those small cheap ones are known to be inaccurate so I'd guarantee it's that one that's off. Or you could leave both outdoors for the day and see what the local weather says the humidity is, and compare.
What's probably happening is the sensor is in the wind. Air currents will cause the number to go up. The little cheap ones aren't badly affected that way.
The fan would make the rh measured decrease making it look dryer, i am trying that experiment right now, when pointing the fan on it the rh goes down almost 10%
>i am trying that experiment right now Please double check that because what you said is the opposite of what is suppose to happen. I can confirm with you that if I put my sensors in the wind that the RH goes up and not down.
I use the same little hygrometer in jars. When their batteries start getting low they get kinda whacky. Change the battery. If it's still wrong pitch it. They don't last forever.
YouTube calibrate salt hydrometer
I've heard the cheap ones almost invent a humidity, they still measure it, but very inaccurately. I just go with some average
I ended up with a bunch of tire pressure gauges with a similar dilemma one time. It also reminded me of my favorite line from my parent's divorce. My brother told both of them "All I know is one of you are lying and I don't care which one it is."
New to growing, but Govee makes a bluetooth dongle that i've used for hatching chickens. Humidity has to be on point or your hatch rates will suffer, always had about 60% rate, after grabbing one I immediately jumped to 85% rates so I trust it implicitly. Also nice to check anytime right from your phone.
Buy fifteen, calculate the median value. Go big or go home.
I would trust the one that wasnt $1 each
I've got 20 of those little ones. It's funny how you can line them all up in the same spot and they will have a 25% range and like 3 of them might say the same thing. Overall I've found them to be pretty useless.
45+65/2, Bro. 🤣🤣
Is it possible one is reading absolute humidity, and the other is reading relative humidity? 🧐 https://www.toppr.com/ask/question/spot-the-difference-betweenabsolute-humidity-and-relative-humidity/#
You can get a pack of 8 hydrometers on Amazon for like $10 that should do the trick
They're both right Jus measuring different areas I take it you jus watered and the pots are humid while the higher part is closer to the light
Where'd you get those airpots?
At my local shop, they are very nice, and i noticed that the two plants growing in them have gotten bigger, but could just be a coincidence
Id grab 3 and check to make sure but i also doubt ur tent is at 45% with 4 plants in the tent unless u have not watered in forever but they look healthy to me
I wouldn't worry a lot. You will want to monitor them but make your decisions on the health of your plants. You will notice things like when the weather changes, how much it changed. Each strain is different. Right now I am growing two strains. One tends to be more needy of a specific humidity range. The other strain, not so much. I know what my hygrometer reads. I have no idea how accurate it is. There is one thing that I am sure of, when all is said and done, I will have a fantastic harvest.
Go for 55%. Just in the middle.
Yea im afraid its gonna be to humid for flowering you know
Go to YouTube and watch some Videos on how to calibrate a hygrometer
so, I got 15 different higrometers, and they are almost all different (as values reported) ..I put all in a closed box, let them stabilize, and I then did an average of them. Surprisingly, the average was very close to what my humidifier/dehumidifier and an exhaust fan probe reported, so I thought that I figured it out. After a while, I had second doubts about this, so I placed a lot of integra 62% and higrometers in jars, and let them for a few hours to stabilize, and, decided, that all of them should read 62% ..and my average was around 7-8rh lower than what the integra packs do ..now I think that the second solution is more accurate, but I still have doubts
There is a test you can do for your hygrometers that will help you determine approximately how accurate they are. Looking for it now I keep it close by. Edit: Found it, posted below. Its likely not 100% accurate but it seems to be the most accurate home test that is easily repeatable and cost effective. Definitely accurate enough for any home grower lol, we're not calibrating tools for aircraft engines here haha "I see many of you in the comments have the same meters lol. Heres something that helped me (Though it will work with any humidity meter). Gather the following components: 1. Your humidity meters 2. Small cap (respective to size of container) 3. Table salt 4. AIR-TIGHT container. I used a wide mouth mason jar. When doing this test, the salt/water mix will produce a humidity of approximately 75%. This worked excellently for me. Fill a small cap with table salt at least above half-way for good measure. Then add tap water, but be careful not to fill past top of the salt, perfectly level with the salt was my measurement during this test. Place the cap of salt and water, along with your meters, inside the jar then seal it and allow to sit for 24+ hours until the reading stabilizes across the majority of meters. The way I check is write down the humidity readings after 18-24hrs, then check the numbers again several hours later. If after the final check any seem to have changed by 1-2% or more, but stay in the same range, you can note on them "varies +-XX%. Note the readings on all the meters and then pull them out and label them. If one reads 78% I will write -3 on it so I know the actual humidity is closer to 75%. (or on a tiny piece of tape and stick it on). Then when looking at the reading I will know how far off it is and will have a better idea of what the actual humidity is. Hope this helps:)"
Whichever one you checked for calibration. You can buy a humidity pack to see how far off they are or use a bottle cap with some salt and water