100 percent humidity??

Do a salt test to check the accuracy - http://www.youtube.com/watch?v=d7Ap96SlGZA

The ones at walmart are complete crap.

I own 14 brass ones they are all with in 1% of each other and can very easily be calibrated, I do so every 6 months. I have a bunch of digital ones that are all manufactures and run from 18% to 99% when placed in a 70% environment. they may start ok but quickly go off. Digitals that use a resistive sensor go off quickly and are very fragile they do not handle dirt or dust well. The accuracy in my experience of digitals is only good for 6-8 months then it is hopeless (beyond 10% off) I save a ton of cash with calibratable analogue. The digital units that can be adjusted are costly and the dial easily moved I have found the two I have to be fine in the evening and completely incorrect in the morning. I believe my snakes in exploring 'adjust' them.

I calibrate and check every unit every 6 months and it is rare for me to need to adjust more than 3-5% the digitals are all over the place and the test kits are expensive.

hm i never realized the fight to figure out the correct temperature was so hard haha

And just thing.... When you finally get it right for the summer, fall will change everything and the of course winter. I, for one, won't be bored anytime soon.

Thats the one good thing about where I live... We have two seasons: hot and cold.

That is funny so do we winter and summer with a couple days of fall and spring.

In my experience, hygrometers aren't great, and it's just something you have to make do with.

I've used some of the analog hygrometers (including the one kitedemon linked, purchased from the exact same place). I've never found one that was decent, and the calibration on them always slipped shortly after calibrating them.

There's lab grade hygrometers, but they're pretty expensive. I've never used one so I can't comment on them.

For myself I've settled on a cheap digital unit from the hardware store. Every time I've checked its accuracy against the humidity reported by the weather station, it's always been close enough, frequently enough, that I'm confident that my enlcosure is within the acceptable range, and so far I've seen no indications from the snake that it isn't.

At work we have a lab grade hygrometer they could never be used in an enclosure! They need very careful attention and care to be kept clean. There is no way it could ever be made to work. Unless you were ready to replace it often. ;) (700$ a unit)



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Yup, that's even more expensive than the ones I was thinking of. Seen some analog ones claiming to be "lab grade" starting at ~$80 online. Still probably not well-suited for using in an enclosure though.

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Originally Posted by Drift

Yup, that's even more expensive than the ones I was thinking of. Seen some analog ones claiming to be "lab grade" starting at ~$80 online. Still probably not well-suited for using in an enclosure though.

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Ahhh I think those ones are often hair types they actually use hair as a movement. They are too fragile.

It is always a balance between durability and accuracy. The brass ones I have (the one I linked) are reasonable accuracy and exceptionally robust. I check mine ever 6 months and I have yet to have one more than 5% off. I don't know why you had so much problems with them I have a lot of them and never had any issues. I have a box of dead digital ones I have never had much luck with them.