A heating mantle, or isomantle, could be a piece of laboratory instrumentality accustomed apply heat to containers, as an alternate to alternative kinds of heated bathtub. In distinction to alternative heating devices, like hotplates or Bunsen burners, glasswork containers could also be placed in direct contact with the heating mantle while notconsiderably increasing the chance of the glasswork shattering, as a result of the constituent of a heating mantle is insulated from the instrumentality therefore on stop excessive temperature gradients. Heating mantles could have varied forms. in a very common arrangement, electrical wires area unit embedded at intervals a strip of cloth that may be wrapped around a flask. this equipped to the device, and thus the temperature achieved, is regulated by a variable resistor. this kind of heating mantle is kind of helpful for maintaining associate supposed temperature at intervals a separatory funnel, as an example, once the contents of a reaction are far from a primary heat supply.
Another style of heating mantle could gibe a paint will and is built as a "basket" at intervals a cylindrical canister (often product of plastic or metal like aluminium). The rigid metal exterior supports a "basket" product of cloth and includes heating parts at intervals the body of the heating mantle. To heat associate object, it's placed at intervals the basket of the heating mantle. In more distinction to alternative ways of applying heat to a flask, like associate oil bathtub or water bathtub, employing a heating mantle generates no liquid residue to drip off the flask. Also, heating mantles typically distribute heat equally over the surface of the flask and exhibit less tendency to get harmful hotspots
