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Differential Pressure Transducers

Code: 8310 EN Delivery: 10 - 12 weeks Warranty: 24 months

Model 8310Models 8313, 8314 Models 8315, 8316

Model 8310for lower pressure rangesModels 8313, 8314for medium pressure rangesModels 8315, 8316for high pressure ranges

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Measuring ranges from 0 ... ± 35 mbar to 0 ... ± 500 bar Accuracy 8310 EN

Application Description

The here presented pressure transducers measure differen- ces in pressure between the two connections of the measur-ing element. Pressure differences can be measured with re- spect to a reference pressure, such as atmospheric, or to the command variable of a regulation system. Equally, however, it is possible to measure pressure differences within systems that have a high static pressure. One practical example of this would be measuring a flow rate by measuring the pressure drop occurring across a metering diaphragm. The differential pressure transducers react in both directions - as are found, for instance, on double-acting hydraulic cyl-inders in material testing machines - and can handle liquid or gaseous media on both ports. Venting holes simplify practical application. The robust design and the use of stainless steel make it possible to use the differential pressure transducer under tough operating conditions. On both pressure ports, the differential pressure transduc-ers include a closed chamber, each with a membrane. Both membranes, like all the parts that come into contact with the medium, are made of stainless steel and are welded to cre-ate a hermetic seal against the inner space of the measur- ing element. Transducers with this structure are also referred to as wet/wet; it allows differential pressure of gaseous and liquid media to be measured directly. The here presented dif-ferential pressure transducers show another interesting fea-ture: they operate bidirectionally. In other words, it does not matter to which port the higher pressure is connected.The physical magnitude of the pressure is converted into an electrical magnitude by means of an integrated Wheatstone bridge circuit, consisting of four foil strain gauges. Integrated measurement amplifiers for ± 5 V or 4 ... 20 mA are offered as an option; this increases the height by 29 mm.

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