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.
Thank you for the hygrometer recomendation. What do you mean by deleting some PM's? I'm not close to the limit?......
12-09-2012, 12:34 AM
martin82531
Re: hygrometer
Quote:
Originally Posted by kitedemon
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.
I would suggest buying a handful ideally 10 or so then check them against each other. Often there are a few that are different than the pack. The ones differing are likely off and the pack are likely close. There are very accurate digital thermometers on the market but they often come with a remarkable price tag.
