Uwell has developed several independent replacement-coil ecosystems, including Crown, Caliburn, Aeglos, Valyrian, and older Rafale products. Artisan Vapor currently lists uwell coils such as Crown 3 replacement heads, Caliburn G and G2 coils, Aeglos UN2 mesh coils, and Crown M coils.

The uwell crown 3 coils are specific for the Crown III tank generation. Compatibility references list multiple Crown 3 resistances, including 0.25Ω, 0.4Ω, 0.5Ω, and later mesh options. Do not assume these coils are compatible with Crown IV or Crown V tanks.

Uwell crown coils are therefore too broad to determine compatibility on their own. The exact Crown generation matters. Similarly, uwell crown 4 coils are a separate platform developed for the Crown IV tank, with documented options including 0.2Ω and 0.4Ω SS904L coils as well as later mesh variants.

The uwell caliburn coils listed by Artisan belong to an entirely different low-power pod ecosystem. Caliburn G replacement coils are commonly available in 0.8Ω mesh and 1.0Ω MTL configurations, with later G/G2-family resistances adding more options. These do not fit Crown tanks.

When replacing a Uwell coil, confirm the full device generation first. Then match the printed resistance and recommended operating range to that device. New cotton-based coils should be saturated before normal use and replaced when flavour or vapor performance declines noticeably.