Hi Terry,

I think Rolando has often stated (in other threads) that the standard encoder version can perform well in the cold winter of Illinois (if it means something to you,.. it didn't to me) but the point, I think, is rather that the low temp version is rated (hence garanteed by design / sampling) by the manufacturer (Renishaw) to work accurately through their specified operating temperature range (-40 to +80C)...

Clear skies!

Sébastien