Shut Off Device for Overheating?

I recently added a co2 burner and cap controller to my room. Amazed at the effects it's had on my plants. I am concerned with malfuction and was wondering what type of device I need to buy that shuts my system (lights and co2 not pumps) down in the event temps get too hot.

[h=1]Lux WIN100 Heating & Cooling Programmable Outlet Thermostat[/h]

Yup, there are thermostats that you can simply put inline with the "trigger" cord to most cap light controllers I know at least. It's really only for an emergency but once the temp. has reached the set point, it will kill power to the cap controller and obviously anything that it's hooked up to. The trigger cord is key here as it some how(not an electrician here) makes it so that your "High temp. kill switch" thermostat isn't taking all of the load of amps that your cap controller may be.

Maybe someone here can elaborate or help you better but if you have a trigger cord, that's a pretty key element right there.

this is what i use.

it is a great tool and very cheap and uses the atmosphere or liquids for temperature with a 3 metre long external probe.

you can set it at 26c if it goes above it will switch on a cooler, if it goes below it can switch on a heater.

i used it to switch off my fans at night when my temps went below 19c.

ebay uk. http://www.ebay.co.uk/itm/ATC-800-Digital-Auto-Aquarium-Temperature-Controller-Cooler-and-Heater-Temp-UK-/160873628031?pt=UK_Pet_Supplies_Fish&hash=item2574d0c17f

ebay usa. http://www.ebay.com/itm/ATC-800-Aquarium-Auto-Digit-LCD-Temperature-Controller-/251084388493?pt=LH_DefaultDomain_0&hash=item3a75cbb88d

these ones are smaller and cheaper :
http://www.ebay.co.uk/itm/All-purpose-Digital-temperature-controller-with-Sensor-thermostat-2-Relay-/220961392407?pt=UK_Home_Garden_Hearing_Cooling_Air&hash=item3372534717

sentinal hd-2 has a high temp shut off.you can set your own temps.also has built in timer with battery back up,for your cap trigger cord.plus a second programable outlet.saved me a couple times when vent fans shut off.

CAP HLC-1e is a piggyback plug. plug your ballast into it and set the temp. if your temps go above your setpoint it turn off your light(s) $60

CAP HLC-3e does the exact same thing as the HLC-1e but will also prevent your ballast from hot striking your buls in the event of a voltage drop or power outage. $80