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Tube element of acid-resistant steel (AISI 316L). Brass head 1¼” and 2” has a protective tube with an internal diameter of 9 mm. for thermostat and/or temperature limiter.
Backer immersion heaters are the most common option for liquid heating. It is used as a heat source in e.g. water heaters, boilers, in oil plants and for industrial liquid heating.
The heaters consist of Backer pipe elements that are soldered or welded to flanges, element heads or nipples. They are combined with thermostats, temperature limiters and junction boxes. Alternatively, immersion heaters can be made from ceramic elements inserted in protective tubes.