They differ in their remarks by automatic controllers at rising temperature opening or closing, both as change-over switches, as guards keep them simultaneous the temperature on a firmly stopped temperature level, protection limiter release at reached temperature and do not restart not automatically. Capillary tube automatic controllers can separate-end many brush tracks to switch, differ by lengths of the capillary tube with and without isolation, by liquid-sealing screw connections on the pipe and by differently large feelers in length and diameter. Automatic controllers can be adjusted on different temperature levels, stood however only fixed high temperatures at the housing and feeler.