防爆と耐圧防爆、どちらの保護レベルが高いか？

Flameproofing represents one of the diverse methods within the realm of explosion protection.

These methods encompass: oil-immersed ‘o’, positive pressure ‘p’, sand-filled ‘q’, flameproof ‘d’, increased safety ‘e’, intrinsic safety ‘i’ (inherently safe), special ‘s’, and non-sparking ‘u’ types. Notably, certain methods of explosion protection can be synergistically combined for enhanced effectiveness. (The letters correspond to the types of explosion protection indicated on the labels of explosion-proof devices.)