hygrometer

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Originally Posted by martin82531

Is there a relatively inexpensive hygrometer you recommend.

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http://www.amazon.com/Analog-Hygrome...rds=hygrometer

Accurate robust and can be calibrated using a cheap easy salt test.

http://www.cigarsinternational.com/html/cig101_12st.asp

The salt test is accurate to about 1% RH few digitals are accurate to better than 5% and many are 10% some truly horrible poor quality are 15 or 20%.

The down side of this hygrometer is the metal plate on the back and the magnet. The plate is not well glued (I re glue with hot melt) the magnet is useless I use a rare earth one I actually place the magnet on the outside and hold through the enclosure. I use a strong 1/2 inch by 1/8 one personally.

http://www.ebay.ca/itm/10-Neodymium-...ht_2209wt_1398

martin82531 you need to delete some PMs!
A

I just got 4 of these the other day. They are all within 2% of each other.
They don't feel cheap at all, robust is right. I'm glad I picked them up, thanks to you

I'll have to try that salt test. Thanks for the link

http://www.acurite.com/weather/therm...red-probe.html

many people use this one. can be found at walmart for $12. takes hot side, cold side and humidity on the cold side. food for thought much more acurate and cheaper than those.

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Originally Posted by nick654377

http://www.acurite.com/weather/therm...red-probe.html

many people use this one. can be found at walmart for $12. takes hot side, cold side and humidity on the cold side. food for thought much more acurate and cheaper than those.

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I like this idea, I use 2 of them, 1 for my rack and 1 for my boas!


0.3 Normals (Coilette, Athena and Mary Jane)
1.0 Pastel (De Sol)
1.0 Spider (Zeus)
1.0 Mojave (Prometheus)

0.1 Brazilian Rainbow Boa (Stella)
0.1 BCI (Kiyoko)

Quote:

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Originally Posted by nick654377

http://www.acurite.com/weather/therm...red-probe.html

many people use this one. can be found at walmart for $12. takes hot side, cold side and humidity on the cold side. food for thought much more acurate and cheaper than those.

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Acurites are inaccurate. I've owned 4 and half of them were off 10 degrees F and/or 10% humidity.
While the sample size is small, 50% success rate for me isn't accurate or ideal....

For accurate hygrometers, I use a musical instrument grade dial. (same type I keep in my violin case)

I got mine for $6 each and free shipping.

Accurite specs are Temp +/-2ºC and +/- 15% RH (some are 20%RH) if it is reading 90ºF and 60% it could actually be anywhere between 86ºF and 94ºF and 45%RH and 75%RH some call this accurate, I do not. Every one has their own feelings of what acceptable is I have come to accept 1ºF up or down of correct and 5%RH up or down. Accurites the three I have own two were beyond the specs and returned for replacement. (more than 4ºF off of correct :O ) The third was just inside the 4º tolerance. I refused to use it and gave it to my dad to keep track on the temp outside the kitchen window he believes it is off as well just by feel. (It is off by 3.5ºF the last time I measured it)

I dislike them and NEVER recommend them, too expensive to buy enough to average them out to get a decent baseline and find the 'wanderers' (5 or greater units ten would be best) and I also do not like batteries INSIDE an enclosure they can leak battery acid and a grab bag of acid gasses. neither of which I want in my enclosed system my snake lives in.

mine is within 5% RH of my analog gauge and temp is within 2* using an infared gun. id say for mine is pretty close.

My point exactly and the specs on your IR gun are? +/-2ºF ? so potentially it is 4ºF from correct.