The diy heat stick is so inexpensive to build compared to the one in the link below...but the one in the link has an adjustable thermostat. I could use this in RIMS. Does anyone have one of these?
http://www.northernbrewer.com/brewing/brewing-equipment/burners/electric-brew-heater-15.html
http://www.northernbrewer.com/brewing/brewing-equipment/burners/electric-brew-heater-15.html