Patent ID: 8303173

Claim:
A respiratory system comprising: a heater adapted to heat a container of water through which gas passes and becomes heated and humidified; a controller operatively coupled to the heater; and a temperature probe operatively coupled to the controller, the temperature probe comprising: a housing having an external wall defining a closed end made of thermoplastic resin and an internal cavity, a distal aspect of the internal cavity being surrounded by the thermoplastic resin closed end; a temperature-responsive device positioned in an area within the distal aspect of the internal cavity; a first potting compound in the area holding the temperature-responsive device therein, the first potting compound touching the thermoplastic resin closed end thereat and having a first thermal conductivity; and a second potting compound in an area of the cavity defining a proximal aspect of the internal cavity behind the first potting compound, the second potting compound having a second thermal conductivity lower than the first thermal conductivity, wherein the temperature probe is adapted to sense the temperature of the humidified gas and the controller is adapted to control output of the heater based on the sensed temperature from the temperature probe.