Broag Thermistors
The thermistor decreases the circuit resistance as it gets hotter. The printed circuit board sends a current to the thermistor and can tell whether less or more heat is needed by the resistance in the thermistor.
BROAG S36446 THERMOSTAT TEM HIGH LIMIT 110 C L&G RAK 77.4471
Part No: 2200750 / MPN: S36446
BROAG S49297 FLUE GAS TEMPERTURE SENSOR NTC
Part No: 2201078 / MPN: S49297
BROA S6149 THERMOSTAT TEM HIGH LIMIT 110 C L&G RAK- OBSOLETE
Part No: 2200748 / MPN: S6149