Posted by:
markg
at Mon Dec 1 12:20:21 2003 [ Email Message ] [ Show All Posts by markg ]
Rancos are ON/OFF (not proportional) controllers with adjustable differential (diff between ON temp and OFF temp.) They are high quality and have high capacity. When the heat tape is in a position where it doesn't lose heat quickly (like under a wood cage), the Ranco's control may seem to hold the heat tape constant, when in fact it is slowly cycling to the difference of the differential. You would see it more if the room was cold. Anyway, you're right, Rancos are higher-quality than those $30 jobs.
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