1.TZ limit switch with CE certificate, 2. Double circuit ... oil-proof. Features Double circuit type of limit switch Highly rigid construction, consists of intensive plastic and ... proof and oil-proof construction Built-in basic switch with double spring mechanism, longer mechanical life Smooth ... . (at 500VDC)Dielectric strength1000VAC, 50/60HZ for 1 minute between terminals of the same polarity1500VAC, 50/ ...