Animal plastics rack on herpstat: temp differences between tubs. Why??

[Dezoruba]

Hey everyone. This problem has been bugging me for a while and I've yet to find a solution to it.

I have my snakes in an animal plastics, 7 shelf, CB70 rack. It's set up with a herpstat 1 set to 88 degrees. The herpstat probe is on the middle shelf but it was the same way when the probe was on the top shelf.

I only have 4 BPs right now so not every tub is being monitored.

All temps are taken using both an acurite probe and a infrared thermometer.

The 1st tub on top has a hot spot of 94 degrees.

The 3rd tub has a hot spot of 100 degrees (why?!?!?! Was not this hot this morning)

5th tub has a hot spot of 89.

6th tub has a hot spot of 95.

No matter what I do they all have different temps and it makes no sense to me. Could it be a problem with the flexwatt in the rack? Idk what else it could be!




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[Scottywelsh]

Check the temp of the flexwatt instead of the tub.
If it's drastically different then there could be a problem with it.
Temps do tend to change from tub to tub in a rack but more likely gets slightly hotter the further up the rack you go so for it to drop on the second tub up I'm thinking it's the flexwatt.

[Dezoruba]

Check the temp of the flexwatt instead of the tub.
If it's drastically different then there could be a problem with it.
Temps do tend to change from tub to tub in a rack but more likely gets slightly hotter the further up the rack you go so for it to drop on the second tub up I'm thinking it's the flexwatt.

I just removed all the tubs and checked the tape with an infrared monitor. Just dragging the laser along the tape I get wildly different temps, but at the hottest point on each section it goes:
94
95.3
97
94

(Last 3 tubs can't be removed because my bed is in the way)

So... that seems pretty normal to me.


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[Scottywelsh]

That does seem normal. But if 1 tub is getting 95f over the hole tub that's on the flexwatt and the tub underneath is only getting 95f at 1 or 2 points and the rest is 80 then that could be the temp difference.
Reading that back doesn't make as much sense as it did when I was writing it lol. Do you get what I mean ?
Maybe leave the tub on there for a bit and then take the temp of different parts of the underneath of the tub to see if the tubs are getting consistent heat

[Alexio]

Is the bottom of the tubs completely flat or is there a slight raised section in the middle?
If your heat tape routed down into the rack so it's sitting below the rest of the top of the shelf? Is there a gap at all in-between the tape and the tubs?

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[Dezoruba]

Is the bottom of the tubs completely flat or is there a slight raised section in the middle?
If your heat tape routed down into the rack so it's sitting below the rest of the top of the shelf? Is there a gap at all in-between the tape and the tubs?

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Yeah, they're sterilite tubs so there's a little bit of a raise in the center. Do you think that would effect the even distribution of heat?

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[Dezoruba]

I think I'm just gonna replace the flexwatt regardless because I don't even know how old the thing is

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[Alexio]

That might be the safest bet, does all the wiring and plugs look the same? Are they wired in parallel or all plugged into an extension cord?

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