Surge arrester, Measurement signal: 0/4-20 mA (0–66 V/80–230 V), 500 mA, PFM, Profibus PA, Foundation fieldbus, Communication protocol: HART, Enclosure: screw-through version M20, Enclosure material: stainless steel (1.4305), Operating temperature: -40–80 °C, Protection rating: IP67, ATEX approval