In industrial automation, the demand for reliable and accurate pressure measurement solutions is crucial, particularly in hygienic applications and harsh operating conditions. WIKA, a leading manufacturer of measurement instrumentation, offers the PSD-4 electronic pressure switch, which serves as a versatile solution for a wide range of industrial automation tasks.

With EHEDG and 3-A certification, the PSD-4 is specifically designed to meet the stringent hygienic requirements of various industries. This article explores the features and benefits of the WIKA PSD-4 electronic pressure switch and highlights its ability to maintain accuracy, durability, and flexibility in demanding environments.

Uncompromising Hygiene Standards

Industries operating in hygienic environments, such as food and beverage, pharmaceuticals, and biotechnology, require instrumentation that adheres to strict sanitary regulations. The WIKA PSD-4 electronic pressure switch meets these requirements by holding both EHEDG (European Hygienic Engineering and Design Group) and 3-A certifications.

These certifications validate that the pressure switch is designed and manufactured to ensure hygienic integrity, making it suitable for use in applications where cleanliness and sterility are of utmost importance.

Precise and Reliable Pressure Monitoring

The WIKA PSD-4 electronic pressure switch guarantees exceptional accuracy with a deviation of less than ±0.5%. This level of precision ensures an accurate representation of the process pressure, delivering reliable measurements consistently.

Moreover, the pressure switch demonstrates minimal long-term drift, enabling it to maintain its accuracy over extended periods, even after more than 100 million load cycles. This reliability is essential in applications where continuous and precise pressure monitoring is critical to maintaining optimal operation.

Versatile Output Options

To accommodate diverse automation requirements, the PSD-4 pressure switch is available with multiple output options. Users can choose between a digital output signal, switchable analogue output, or a scalable analogue output.

The digital output signal provides a straightforward and easily interpretable output for process control systems.

The switchable and scalable analogue outputs allow users to adjust the measuring range according to their specific application needs, offering flexibility and adaptability.

Convenient Self-Diagnostics and Monitoring

The WIKA PSD-4 pressure switch includes self-diagnostic capabilities, enhancing its usability and reliability. Through the self-diagnostics feature, the pressure switch continuously monitors its condition, ensuring that it operates within specified parameters.

If pressure or temperature values exceed or fall below the predefined thresholds, the system promptly alerts users, facilitating proactive maintenance and preventing potential issues. This real-time monitoring capability enables users to detect changing process conditions and take prompt corrective actions, minimizing downtime and optimizing productivity.

Enhanced Data Analysis and Insights

The availability of condition data and diagnostic functions enables comprehensive monitoring and analysis of the pressure switch’s performance. Users can directly access pressure or temperature values, ensuring that they align with the desired specifications.

By examining the collected data, operators can gain insights into process variations, enabling them to optimize system performance and identify potential areas for improvement. The additional information provided by the pressure switch facilitates a thorough assessment of load conditions, allowing for better load management and increased operational efficiency.


In hygienic applications and harsh industrial environments, the WIKA PSD-4 electronic pressure switch stands as a reliable and versatile solution. With its EHEDG and 3-A certification, the pressure switch meets the stringent requirements of industries with high hygienic standards.

The PSD-4’s exceptional accuracy, minimal long-term drift, and multiple output options ensure precise and reliable pressure monitoring for a range of industrial automation tasks.

Its self-diagnostics and monitoring capabilities provide real-time alerts and valuable insights for proactive maintenance and improved operational efficiency.

By choosing the WIKA PSD-4 electronic pressure switch, industries can confidently enhance their hygienic processes while maintaining accurate and efficient pressure control.


Greg Rusznyak
WIKA Instruments (Pty) Ltd
Tel. +27 11 621 0000

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