Hi Jenn, you don't need to monitor every tray. All trays on the same level should be the same temp if they are the same distance from the heat source. Routering simply means a groove was cut so that the heat rope is bebelow or flush with the surface of the shelf. This is best to prevent the tray from bashing into it, and also to prevent ware .
I actually would recommend Flexwatt over Heat rope, as it is flat and distributes the heat over a wider surface. It's not as readily available however,since it's not CSA approved, and often you need to import it yourself.
The term "Rheostat" is often used by herpers to mean "light dimmer"
It's not terribly important to most herpers but being an electronics specialist, I will just quickly state that dimmers are not Rheostats, by definition.
I Rheostat is a variable resistor, and nobody is using those in Herpetoculture. (just a minor technical point)
Dimmers are actually phase controllers, they aren't variable resistors.
They work by controlling the percentage of each cycle of line voltage that is actually applied to the load.
the "load" being your lamp, heat tape, heat rope etc.
Dimmers are actually choppers. So essentially when you are turning them down, you are simply adjusting the chopping rate, so that they are not on for the full cycle of line, and its the same effect as plugging and unplugging very rapidly.
Current only flows for the duration that the load is on, so this of course effects the heat output.
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Uncle Roy
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