...al resistance Sealing details Basic model (without seal) --- --- Z, A, D2D, DZ, D2MV, D3C, D2X, D2T, J, D2F, D2MQ, D2MC, X, V, VX, K, SS, D2S, TZ Resists penetration of dirt and dust into the...https://www.ia.omron.com/support/faq/answer/29/faq02189/