Temp/ RH sensor defferences

I run three seperate temp/ rh sensors/ monitors in my tent. Right now im testing them in the same exact location. Each one gives a different reading. My inkbird controllers can be reading up to 8 degrees different than AC Infinity controller. Same with rh. It really makes it hard to decide which one to trust. I may throw an old school mechanical thermometer in there just to try and figure out which one to trust. Anyone else go through this?

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Are the 2 sensors located in the exact same location in the tent? Temp and humidity can vary quite a bit depending on where you are in the tent.

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my AC Infinty RH is different than what my Humidifier says along with my Hydrometer. its a few degrees off from each other, but uts close enough for me.

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Yes they are. Ill get a pic shortly. I actually have sensors for three seperate systems in the same location.

If it was 2-3 degrees I could live with that. But the difference is more than that and drives me nuts. Ill try cleaning the sensors again.

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Interesting. It’s normal for sensors to be off slightly, but 8F is surprising. I’d call 3 or 4 degrees max common. Inkbird and AC Infinity are both great companies.

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I have a similar issue with the crap I’ve bought too lol. Makes you wonder

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Ok so I really adjusted them so they are literally in the same spot within an inch and that got my temps close. But my rh is still off a bit which im not as concerned with right now as temp.

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Anecdotal experience, but I get more variance in RH. My sensors are typically off by 4 to 6 points. Maybe a bit more in artificially humidified or dehumidified areas.

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On a side note, anyone have a recommendation on ratchet hangers? I just ordered a new pack of Vivosun to replace a couple that are junk after a year. Two of the four new onces are junk out of the package. Done with them.

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I was having the same problem. I saw that all of my devices have to ability to be calibrated…so I looked around and found this. I followed it and now they all read the same…who knows if that is the right reading.

“Dampen a towel (not dripping wet, but good and damp), then wrap the hygrometer in the towel for 30 to 45 minutes. Then unwrap it and read the humidity (quickly). If your hygrometer is perfectly calibrated (few are) it will be reading exactly 100% humidity . Most likely, it will be reading somewhere between 80 and 90%.”

Then I just adjusted the calibration to be 100%

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While I was ordering an AC Infinity fan I got some ratchets too. The look solid and do what they are supposed to do.

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I will try some of those. Thanks

Accurately measuring RH is tough to do. Normally a wet bulb is used for accurate readings but that’s not workable in the grow space. The sensors used are a hydrophilic plastic that changes it’s resistance with changes in moisture content. They really are for reference only.

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I have had the same issues… I have found… For mine… The inkbird was most accurate… Plus I do believe it can be calibrated… My inkbird run my oil filled radiator heater for heat and a inline fan on an intake for cooling.

My ac infinity exhaust is almost always set at somewhere between 3-5 and constantly bringing in fresh air… So i don’t really need the temp reading on my ac infinity.

My inkbird humidity controller is set similar to my heat… One program… Humidifier other program is an intake inline fan.

With the light heat and the other fans circulating air… My environments are spot on…

Hope that helps some.

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Ac infinity… So far haven’t had a single one fail… Had vivosun and a few other main brands… Which I can’t remember off hand… Fail badly… Almost messed up my hlg 600Rspec.

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Im going to grab some. Thanks