Buyers must prioritize explosion-proof certifications (ATEX, IECEx) for all electronic components. Key hardware includes high-precision flow meters with an error margin of ±0.2%, heavy-duty submersible pumps, and corrosion-resistant underground storage tanks (UST), preferably double-walled fiberglass or jacketed steel to prevent environmental leakage. Ensure the dispensing units support multi-nozzle configurations for different fuel grades (92, 95, Diesel) and are equipped with automatic shut-off nozzles and emergency breakaway couplings.