Model number TR115SN.
NEMA 4 Digital Chiller Controller with titanium probe. 115 volt.
Can control a chiller (1/6 power) or heater. More info here:
http://www.customaquatic.com/customa...dexid=ch-ch-ca
This is handy to have if your heater decides to malfunction and NOT turn off, whereby boiling your tank. With this controlling it, it is nice added security.
$70
Jim