[CoolhandJo (Paul)]

Originally Posted by atalas

Hey Paul,I thought I remembered reading somewhere that the Atik 4000 had two stage peltier cooling so I looked this up.

http://www.optcorp.com/product.aspx?...695-15106&tb=2

Is there something different about your model?

Yes. I have that model. It has 2 stage peltier cooling but from what I know and have read it can only reach 40 deg below ambient. The single stage only reaches 20 deg below. Further cooling from there requires water assist.

Therefore if it's 25 deg c outdoors then two stage can get to - 15 deg sensor temp