What kind of thermostat can power two heat sources?

What kind of thermostat can power two heat sources? I want to double up on heat cable in my vision rack. I currently use the herpstat1 for both my racks, but the herpstat1 only has one input.

The Herpstat 2 has two probes. If it's the same type of heat cable though, you could probably just plug both cables into a strip and plug that into the Herpstat 1 as long as you're within the wattage I'd imagine.

Vivarium 300x2. I run two different racks with it and love the thing.

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I second the Herpstat 2! I've got one running my juvenile rack and the other running my incubator.

I use herpstat pro, it does up to four different heat sources.

Herpstat 2 and Vivarium Electronics VE300X2 each have 2 probes and outputs, whereas a Herpstat 4 has 4 of each.