DPGT40 Differential Pressure Sensor

The WIKA DPGT40 differential pressure gauges of the DELTA-line product family are primarily used for the monitoring 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 main function of the measuring instruments is the monitoring of filters, compressors and pumps. Wherever a signal transmission is needed and, at the same time, a differential pressure must be displayed locally, and the DELTA-trans differential pressure sensor finds its use.

An electronic angle encoder, proven in safety-critical automotive applications, determines the position of the pointer shaft – it is a non-contact sensor and therefore completely free from wear and friction. From this, the electrical output signal proportional to the pressure, e.g. 4 … 20 mA, is produced, which then acts to transmit the signal to the control room. In addition, the electrical zero point can be set manually.

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-trans differential pressure sensor 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 a long service life of the product, even under harsh ambient conditions. This ensures that there is no danger from the instrument and it is resistant to external mechanical impacts.