Honeywell L8148E1265 Immersion-type Controller Click below to buy on Amazon: http://www.amazon.com/gp/product/B0009726K6?tag=sukses2015-20 High limit opens burner circuit only Include transformer and accessory terminals for adding a remote low limit controller Case available for horizontal or vertical mounting Requires a 24 Vac thermostat with heat anticipator set at 02A 180 F to 240 F