Bulletin 700-R and 700-RM Sealed Switch Relays work in extremely harsh, dirty environments and hazardous locations. The tungsten-tipped, hermetically sealed contacts provide high-reliability switching of low voltage circuits. The 700-R has an extremely long life because there is no moving armature used to change contact state. The 700-RM is a magnetic latching relay with bi-stable contact cartridges. The coil module for Bulletin 700-RM relays contains two coil windings—one to latch the contacts and the other to reset the contacts.