| 摘要 |
A thermostatic heater device for liquids, in particular for the water of aquariums, comprising within a tubular casing: a rigid support (2) constructed of electrically insulating, heat-conducting material, at least one layer of electrically insulating, heat-resistant flexible film (14) wound about said tubular support, at least one resistive element (16) arranged on a dielectric film wrapped about said first flexible film, a layer of a second electrically insulating, heat-resistant flexible film (14) wound about said dielectric film already wrapped about said layer of first flexible film, means (22) for connecting said resistive element to the electrical supply, and hydraulic sealing means (4, 6) between said tubular support (2) and said casing (8).
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