Micropressure Sensors for High-Tech Factory Floors

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Published November 18, 2025

It used to be that a single sensor could consume more space than an entire modern control board. However, in today’s high-tech environments, like semiconductor fabrication plants and advanced factory automation systems, space is measured in millimeters and pressure is maintained at the Pascal (Pa) level. In this week’s New Tech Tuesdays, we explore the critical role of micropressure sensor technology in meeting the space constraints of the industrial sector. These tiny yet powerful devices deliver the precise, real-time pressure checking necessary for supporting ultra-clean environments and ensuring the efficiency of complex industrial equipment.

Micropressure sensing measures very small pressure differences—typically a few hundred Pa or less. This level of sensitivity is non-negotiable in environmental control, where a slight fluctuation in differential pressure can indicate a breach in a cleanroom or a critical clog in a ventilation system.

Currently, we are seeing a trend toward compact, integrated sensor designs that enable engineers to embed monitoring directly at the point of measurement. This move not only saves precious mounting space but also minimizes the signal loss and latency associated with longer pneumatic lines, leading to higher-fidelity data.

In semiconductor and pharmaceutical manufacturing, maintaining a positive pressure cascade is the primary defense against airborne particulate contamination. Differential pressure sensors are at the heart of this system.

These devices continuously measure the pressure difference between adjacent clean zones. This data ensures that air flows correctly from the cleanest areas to the less clean areas, forming a robust barrier. The ability to set custom high and low thresholds is paramount here; it allows the system to immediately detect and signal when a door is opened or when the HVAC system is underperforming, all of which helps prevent a catastrophic loss of environmental control.

The applications of high-precision pressure sensing extend directly into equipment health and the future of predictive maintenance. By monitoring pressure in ducts and internal components, we can gain early insight into impending mechanical failures before they occur.

Consider the role of exhaust and filtration systems, which are vital in chemical vapor deposition (CVD) or etching equipment. An increasing pressure drop across a filter is the earliest sign of filter clogging, allowing a maintenance team to schedule a replacement well before the air quality or gas flow is compromised. Similarly, measuring the pressure in an exhaust duct provides a reliable method for detecting exhaust fan irregularities, signaling a motor failure or belt break before a dangerous backup occurs.

The newest generation of these sensors is designed for plug-and-play integration into modern factory automation systems. They are not merely simple switches; they provide granular, continuous data streams.

By offering both digital outputs for alarm conditions and analog current outputs for process control and data logging, these compact devices can feed directly into a customer’s existing programmable logic controller (PLC) or supervisory control and data acquisition (SCADA) system. This dual-output capability supports both emergency control and long-term data analysis, which is essential for process optimization and regulatory compliance.

With automation systems becoming increasingly essential to an array of manufacturing and industrial processes, OMRON Electronic Components offers solutions designed to save space and provide clear on-site monitoring. OMRON’s E8Y-L micropressure sensors with digital display (Figure 1) enable engineers to implement these precise capabilities in space-constrained applications. These compact sensors are ideally suited for semiconductor manufacturing equipment and factory automation applications. They feature an easy-to-read red LED indicator, a compact design (31mm × 30mm × 30mm), and the capability to set thresholds for upper and lower measurement pressure limits, with both digital and analog current output models available.

Figure 1: Omron Electronics E8Y-L micropressure sensors with digital display are EN and UL approved. (Source: Mouser Electronics)

The adoption of compact micropressure sensors is fundamentally changing how we approach precision monitoring in high-tech industrial environments. Their ability to deliver high-fidelity differential pressure data in a minimal footprint is key to safeguarding cleanroom integrity, enabling predictive maintenance through filter and fan monitoring, and ensuring efficient operation across automated factory floors.