Pressure Measurement & Control


Compact differential pressure transmitter

January 2019 Pressure Measurement & Control

The Halstrup Walcher P 34 series differential pressure transmitter is designed for pressure monitoring applications in cleanrooms, laboratories, pharmaceutical plants and operating theatres as well as for special uses in machine and plant construction. In addition to measuring the differential pressure, the instrument also records positive and negative overpressures as well as flow rates or volumetric flows.

The measuring range is scalable from 10-100% and two optional contact points allow the user to connect visual or audible alarms that are triggered any time values rise above or fall below specified limits. The transmitter can be configured easily via the USB interface, while a selectable time constant allows the transmitter to be adjusted perfectly to the pressure conditions and thus ensures a stable output signal. The P 34 can be mounted on top-hat rails.

Other features include:

• Measurement of differential pressure, volume flow or P-/T-compensated volume flow (optional) possible.

• Volume flow can be configured via k-factor, dPmax/Vmax or 20 individual values.

• Scaling, characteristic line form and many other parameters can be set via PC-software (optional).

• Two floating switching relays (optional).

• Output signal can be configured 0-10 V or 0/4-20 mA.

• Highly stable measurements thanks to cyclical self-calibration of the zero point.


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