• Differential Pressure Transmitters

Differential Pressure Transmitters


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The Pascal-ST/ZB bidirectional differential pressure transmitters are mainly used for clean room applications where accuracy and reliability are a must and space is limited

The measurement technology is based on the static principle with piezo-resistive bidirectional membrane.

The state-of-the-art electronics and firmware in combination with the automatic zero-point calibration allow very accurate and stable readings without any drift.

Pascal -ST/ZB models are available for 2 measurement ranges, -25 to +25 and -100 to +100 Pa.

Depending on the application, various model types are available, with integrated alarm switches or with analogue output, with or without display.

All instruments can be programmed, configured and adjusted using the PascalTool-WIN PC software.

The Pascal-STV/ZB disposes of a scalable and adjustable analogue output (mA or V). This makes it fi t for integration and adaptation to controlling systems (PLC). A digital output (RS-232) is also integrated by default.

This compact size product range among differential pressure measuring instruments excels by robust design and highest long-term performance.


Features

  • High cost efficiency
  • Excellent accuracy and reproducibility
  • Automatic Zero-Point calibration
  • No position dependency
  • Long term stable
  • Easy adjustable and configurable by PC
  • Password protection
  • Easy mounting and startup
  • Scalable & adjustable analogue outputs
  • Alarm visualisation by LED
  • Integrated 2-line LCDisplay
  • Possibility to measure the air velocity
  • SWISS-MADE Quality


Applications

Measurement and control of low air differential pressures and air velocities:

  • Industrial HVAC installations for processes
  • Clean rooms applications
  • Isolators, Laminar Flowboxes
  • Hospitals, operating rooms
  • Laboratories, Testing rooms
  • Monitoring systems
TypePascal-STV 25 ZBPascal-STV 100 ZB
Part no.260 1241260 1242
Measurement range-25 ... +25 Pa-100 ... +100 Pa
Max. permissible operating pressure+/- 25 Pa+/- 100 Pa
Accuracy at 20°Ctypical ± 0.15 Patypical ± 0.25 Pa
Temperature effectmax. ± 0.20 Pa (at constant operation temperature out of adjustment temperature)
Max. resolution0.1 Pa
Measurement intervalapprox. 20 measurements / second
Hysteresis< ± 0.15 Pa
Offset-Drift under „TLV“ conditions± 0.15 Pa (with automatic zero-point calibration)
Max. permissible overpressure± 20’000 Pa
Operating temperature5 ... 45°C
DisplayDot matrix 2 line LCD (36 x 14 mm)
Analogue outputs
(scalable and adjustable)
0 ... 10 V / 2 ... 10 V (burden to ground >10 kOhm)
0 ... 20 mA / 4 ... 20 mA  (burden <500 Ohm)
Digital interfaceRS-232 (ASCII-string, complex protocol)
Power supply10.5....35 VDC
Power consumptionmax. 2.5 W (in operation)
ProtectionIP 54 / EMC
Measurement mediumdry, not condensing, non aggressive gases