Selecting an Immersion Heater on Amazon.com
An immersion heater is a heating element that provides direct-contact heating of liquids, air and gasses. Used in laboratories, research facilities, and petrochemical applications, immersion heaters are used to ensure that substances are kept within a specific temperature range. Some immersion heaters also circulate fluids, eliminating hotspots and preventing separation during processing. Models with variable temperature settings enable users to fine-tune the temperature, and those with built-in safety guards prevent temperatures from reaching levels at which containers might combust or be damaged. Some heaters have a pilot light that provides visual verification that the heating element is operating as intended. An immersion thermostat regulates and monitors fluid temperatures.
The shape of the heating element and mounting style also affect how the liquid is heated. Mounting styles include over-the-edge, screw-type, and flange. Over-the-edge mounts are attached to the side of an open-top container or to an external stand. Flange mounts are used in high-pressure tanks for heating air, gasses, and liquids. Screw-type mounts are designed for use with specially designed containers and are most often used in industrial water tanks and petrochemical applications. A variety of sheath materials cover the element to protect it from damage by the heated substance. For example, copper sheaths are commonly used for water tanks, protection from freezing, and other water-type applications.
An immersion bath is a container that is designed for use with an immersion heater or circulator that will be used with liquids. A clear bath enables users to view the contents while an insulated bath keeps the sides of the container cool to the touch. While the heating element of an immersion bath comes into direct contact with the liquid being heated, the heating element of a water bath is behind an insulated surface.
When selecting an immersion heater consider the type of container, mounting style, fluid depth, the volume of the fluid to be heated or circulated, temperature range, element shape, and the fluid with which the heater will be used and the corresponding sheath material. Heaters are available for 120VAC or 240VAC power sources.