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The pressure transmitters of the series DS1 and DS2 is for using in air and non aggressive gases. They measure difference- and absolute pressure, relative pressure and optionally velocity of flow. The analog output signal is 0-10 V or 4-20 mA. The 4-20 mA pressure transmitter is realised in two wire technic. For measurement of velocity of flow its possible to order the square root output. Because of the piezoresistive cell DS1 reach a high reliability and precision. The dependence of zero signal from mounting position is very small. The resistance against overpressure is higher than by using other physical principles. For applications with higher pressure ranges we offer additionally to DS1 the type DS2. The transmitters are housed in a robust aluminium package. This guarantees good EMC-properties.