Join our team! Watlow is hiring. No experience necessary, skilled training provided, great pay, full benefits and advancement opportunities. Click here to visit our career opportunities page and apply today.

Silicone Rubber Heater Adds Moisture To Oxygen For Patient Comfort


Moist oxygen is critical for patients requiring respiratory therapy. Humidity helps the lung absorb life-giving oxygen and greatly aids patient comfort. A problem arises with oxygen storage. It must be dry to prevent corroding the high-pressure tanks, and to prevent condensation from forming and freezing during use. To get around this "dry oxygen" problem, a medical equipment manufacturer was developed a fail-safe way to put moisture back into the oxygen by employing an electrically heated humidifier.


Watlow engineered a flexible heater with holes to accommodate a thermostat, high-limit control and support framework. Vulcanizing the heater to the humidifier's base was recommended to improve performance by eliminating a layer of mastic that would otherwise act as a thermal barrier. This complete sub-assembly, with UL® and CSA approvals, saved the manufacturer the added cost and labor associated with producing the part in-house.

 UL® is a registered trademark of the Underwriters Laboratories, Inc.