... size 3.Simple to mount 4.High switching performance KTO 011: Thermostat(normally closed), contact breaker for regulation heaters.KTS ... (normally closed), contact breaker for regulating hearters.KTS 011: Thermostat (normally open), contact maker for regulating of filter fans ... ,stego thermostat,thermal controller, temperature controller,bimetal thermostat,Thermostat KT 011