3 Wire Proximity Switches

We are offering 3 wire proximity switches.
protocontrol offers variety of proximity sensors & switches for automation. More than 3500 varieties of switches are offered under one roof. These include tubular threaded switches from m5 to m 80, square rectangular, slot types. The supply voltage available is ac, dc and ac-dc universal. Special namur switches are certified for use in hazardous area. Models with quick disconnect plug are offered for ease of wiring. Switches can directly be connected to load like plc.
these are three wire switches (+ ve, -ve and output) working on 10-40 v dc. And directly drives dc relay. These switches are compatible with plc modules because of its insignificant leakage current (50 ua max) dc switches are divided into two categories according to load connection1) load connected between supply wire & output wire: os (npn)
2) load connected between ground wire & output wire: og (pnp)
please specify logic whether no or nc. Special switches withchange-over logic are also available. Special switches with high operating frequency are available for applications of speed sensing.special protection incorporated within the switch against damage due to back emf generated by inductive loads like relay.