Way back in the days (before BP) I used to own some of those and I say some because they are very prone to failure, you can easily run through one a year, the temps are not very stable (they allow for way too much fluctuation), most importantly when it comes to failure they fail wide open.
The very minimum t me is the intro http://www.spyderrobotics.com/index....=index&cPath=1 , yes it might be double the price but I can guarantee that you will never get 10 years out of the t-stat you posted, with Herpstat you will (I have some that have been running for 11 years now)
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