WIKA PSD-4 Electronic pressure switch with display Model PSD-4

$120.00

The WIKA PSD-4 Electronic Pressure Switch combines precise pressure measurement, a digital display and configurable switching outputs in one compact instrument. It provides real-time pressure readings and supports automated pressure monitoring and control.

With accuracy of less than ±0.5%, adjustable switching functions and optional IO-Link communication, the PSD-4 is suitable for hydraulic and pneumatic systems, machine tools, pumps and hygienic industrial applications.

🕑 Lead time: 6-8 weeks
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The WIKA PSD-4 is an electronic pressure switch designed for industrial automation. It displays measured pressure digitally and can provide switching signals and an optional analog output for integration with control systems.

Key Features

  • Digital display: Red digits and a 14-segment display for clear readings.
  • High accuracy: Less than ±0.5%, according to WIKA.
  • Configurable outputs: PNP/NPN switching outputs and optional 4–20 mA or 0–10 V analog output.
  • IO-Link option: Supports parameterization, process data exchange and condition monitoring.
  • Flexible installation: Display rotates 180° and the housing rotates more than 300°.
  • Simple setup: Three-button operation for configuring pressure thresholds and output functions.
  • Long service life: Designed for more than 100 million load cycles.

Suitable Applications

  • Hydraulic and pneumatic systems: Monitor operating pressure and trigger control actions at set points.
  • Machine tools: Support pressure-dependent machine functions and alarms.
  • Pumps and compressors: Monitor pressure and provide switching signals to automation systems.
  • Special-purpose machinery: Adapt switching thresholds and output signals to specific equipment requirements.
  • Food and pharmaceutical equipment: Suitable configurations are available for hygienic applications; verify the required process connection and approvals.

Technical Highlights & Selection Considerations

When selecting a PSD-4, confirm:

  • Pressure range: Choose a range appropriate for the operating pressure and expected peaks.
  • Output configuration: Check the number and type of switching outputs and whether an analog signal is required.
  • Communication: Select IO-Link if parameterization and diagnostic data need to be exchanged digitally.
  • Process connection: Confirm thread type, size and any hygienic connection requirements.
  • Electrical compatibility: Verify supply voltage, connector pin assignment and PLC input requirements.
  • Media and temperature: Confirm wetted-material compatibility and allowable process temperature for the chosen version.

The analog output can be scaled over a 5:1 range, providing flexibility when adapting the instrument to different measurement requirements. Exact pressure ranges and connection options depend on the selected configuration.

FAQ

Q1: Does the PSD-4 provide both switching and analog outputs?
Yes. Depending on configuration, it can provide switching outputs alongside a scalable 4–20 mA or 0–10 V analog output.

Q2: What is IO-Link used for?
IO-Link supports digital communication, device parameterization and access to diagnostic or condition-monitoring information.

Q3: How accurate is the PSD-4?
WIKA specifies accuracy of less than ±0.5%. Check the datasheet for the exact measurement conditions and selected version.

Q4: Can the display be adjusted after installation?
Yes. The display content can be rotated 180°, and the housing can rotate more than 300° to improve readability and cable alignment.

Q5: What information is needed to order a replacement?
Provide the full model or part number, pressure range, process connection, output configuration, electrical connector and any IO-Link or approval requirements.

Measurement Accuracy & Performance Limits

Max. Measured Error (IEC 61298-2) ≤ ±0.5% of span
Switch Point Accuracy ≤ ±0.5% of span
Non-Repeatability (IEC 61298-2) ≤ 0.1% of span
Zero Point Adjustability Max. ±3% of span
Reference Conditions Per IEC 61298-1

Temperature Error & Long-Term Stability

Temperature Error (0 to 80 °C / 32 to 176 °F) Standard threaded process connections with pressure port: ≤ ±1.5% of span
G ½ B flush diaphragm with increased overpressure limit: ≤ ±2.5% of span
G 1 hygienic connection and TRI-CLAMP® 1½″ & 2″: ≤ ±3.5% of span
Long-Term Drift (IEC 61298-2) Standard measuring ranges: ≤ ±0.1% of span / year
Ranges ≤ 0.6 bar (10 psi), flush diaphragm, or hygienic TRI-CLAMP® connections: ≤ ±0.2% of span / year

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