There is a lot of ideas about probe placement. The probe on the uth is one idea it often leads to decidedly variable temps if the room temps are not stable. As the room changes the enclosure changes with it but the probe is protected against change by the uth and tape so it carries on.
The interior placement, probe placed on the bottom of the enclosure it will adjust temps based on the room temps and provide higher accuracy. The issue is the probe in either set up MUST not move and tape should never be placed inside the enclosure I usually recommend hot malt glue to fix probes.
I personally use both method they both work I have tested 'liquid' on the probe yes it dumps the temp. But it dumps the temp of everything the temp comes up equally and there is no spike and poo is not that cold out of the snake so the 'spike' is not as great as people thing I set 90º and the biggest spike I managed was 95 for 25 min. The advantage of stable temps IMO out weights the concerns abut a snake pooing exactly on top of a probe under the substrate.
I also will add that I believe a failsafe t-stat is as important as a primary T-stat. A secondary will protect against a pulled probe, t-stat failure, short circuit ect.
Reply With Quote