A mechanical switch hides its state until the moment it trips, and after a few hundred thousand cycles its spring no longer trips where it used to. The DS 200 P replaces the spring with a welded 316L piezoresistive cell and puts the number on display instead.

Why does contact count matter on a machine retrofit?

One alarm point rarely covers a real process: engineers want a pre-warning, a shutdown and a separate signal to the PLC. The DS 200 P ships with one PNP contact as standard and takes two or four independent contacts, each freely configurable anywhere in the measuring range, switching 125 mA with short-circuit protection. The rotatable display module turns through 300 degrees so the reading faces the operator regardless of mounting orientation. Compared with a mechanical switch plus a separate gauge, one DS 200 P occupies a single 1/2 NPT port and does both jobs.

Where does the accuracy conversation land?

Contact accuracy runs 0.35% FSO standard and 0.25% FSO on the option, with repeatability of 0.1% FSO and a switching life beyond 100 million cycles, so the setpoint stays where it was commissioned. Ranges span -1 bar vacuum to 600 bar with level-scaled mH2O versions, and an optional 4-20 mA or 0-10 V analogue output turns the same unit into the loop transmitter as well. Compared with the intrinsically safe DS 200 IS variant for zone 1 gas areas, the standard PNP version suits general machine and HVAC panels, and the BD SENSORS GmbH ranges share accessories and configuration logic across the DS family.