Abstract: A humidistat including an air inlet defining a beginning of an airflow path through the humidistat, a humidity sensor for enabling measurement of the humidity of air flowing along the airflow path, a baffle, a heat source for heating air along a portion of the airflow path, the baffle and the heat source cooperating to define two zones in the humidistat, and an air outlet defining an end of the airflow path. During operation of the humidistat, the air temperature is higher in one zone than in the other zone, and the higher air temperature zone is downstream from the lower air temperature zone in the airflow path.

Abstract: There is provided a humidifier control system including a water reservoir having a top opening. A pair of wicking pads extend into the reservoir and around a tube which extends over the top opening. An electrical heating element is received inside the tube. First and second spaced apart moisture sensor elements are attached to the tube and are in contact with the wicking pads. The sensor elements conduct electricity in the presence of moisture on the wicking pads and do not conduct electricity in the absence of moisture on the wicking pads. The sensor elements are attached to an electrical circuit which includes a switch and an alarm. When there is moisture on the wicking pads, the switch is on and normal current flows through the heating element and the switch. When there is not moisture on the wicking pads, the switch is turned off and the current through the heating element is reduced to a minimal level, and the alarm is turned on.

Abstract: The contacts of a conventional molded case residential circuit breaker are opened and closed in relay fashion by a remotely controllable operator module. The operator module, utilizing the compliance of the breaker operating mechanism in its ON condition, acts directly on the breaker movable contact arm to effect a separation of the movable contact from the stationary contact sufficient to switch rated current.