W&O, 0.04%__0.065% - 4%

The WIKA DPGS40 differential pressure gauges of the DELTA-line product family are primarily used for the monitoring and control of low differential pressures where there are high requirements regarding one-sided overpressure and static pressure. Typical markets for these products are the shipbuilding industry, process heating technology, the heating, ventilation and air-conditioning industries, the water/wastewater industry, and machine building and plant construction. For these, the primary function of the measuring instruments is the monitoring of filters, compressors and pumps. Wherever a differential pressure must be displayed locally and, at the same time, electrical circuits need to be switched safely dependent on defined differential pressure, the DELTA-comb finds its use. As the pressure passes above or below a defined set point, the switching operation is triggered. The switch point is accessible from the front and can be adjusted in the range of 10 … 100 % of the full-scale value. An assistant scale enables an accurate setting of the switch point and indicates the current set point. Often in these applications, alongside the display of the differential pressure, the current working pressure is also relevant. For this reason, a working pressure indication is integrated within the DELTA-comb differential pressure switch as standard. The two local, easily readable, mechanical displays need no power supply and enable the simultaneous reading of the working and the differential pressure. Furthermore, this saves on an additional measuring and sealing point, reducing additional expense for piping and mounting. The robust aluminium case and shatterproof window enable an extended service life of the product, even under harsh ambient conditions. As a result of the small measuring range of 0 ¦ 250 mbar, the instrument can also be used for applications with low differential pressures.

The SIEMENS SITRANS P320/420 is a pressure transmitter wich features remote safety handling. The instruments™ remote safety handling via SIMATIC PDM saves time during SIL commissioning: rather than manually attending to each individual device across a facility, operators can program transmitters from the control room. This reduces the commissioning time in applications requiring functional safety. Furthermore, both the SITRANS P320 and SITRANS P420 pressure transmitters have an increased proof test interval over other devices on the market. With testing periods of up to fifteen years rather than every two, they significantly lower maintenance costs.