I use a German made dial hair hygrometer which can be calibrated and I think is quite accurate. But I looked at the spec a.nd just had to order one of those electronic ones that Andy has for myself. I don't think there would be any need to calibrate the CEM.
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Testudo Hermanni Hermanni (Corse) tortoises
Last edited by Ozric Jonathan; 09-08-2013 at 10:40 AM.
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