Variohm EuroSensor has extended its range of intrinsically safe sensing and switching components with new Ex-approved pressure switches, level sensors and pressure transmitters from sensor manufacturer ADZ Nagano.
The DPX9I and DPSXU electronic pressure switches, respectively equipped for current or voltage output from a 14-32V DC input, comprise an intrinsically safe and detachable measuring cell with a cable connection to the separate panel-mounted evaluation electronics, which is mounted outside the hazardous area. The measuring cell is available in several nominal pressure ranges from 0-5 mbar up to 0-2,000 bar with generous overload and burst pressure ratings. Silicon membrane technology is used for pressures below 500 mbar, while stainless steel membrane and wetted materials are used in the upper ranges to suit gases and solid media at temperatures from -40°C to +100°C.
With Ex-approval II 1G Ex ia IIC T4 (ATEX), the cell design includes a choice of pressure connections and features protective circuits for reverse polarity, excess voltage resistance, and limitation of performance loss in case of failure. The evaluation electronics includes two pnp high-side switch-signal outputs that are set within a 4-20mA or 0-10VDC range depending upon the cell output type. Setup is made easy via input keys and an LCD readout display on the evaluation electronics.
February 17, 2016
