FSM AG | Room pressure monitoring

Room Pressure Monitoring for Clean Rooms, Operating Theaters and Sensitive Production Areas

Controlled pressure conditions – protection through air

In clean rooms, operating theatres or high-tech production environments such as semiconductor manufacturing, air quality is essential - but air must also flow in the right direction.

This is exactly where room pressure monitoring with differential pressure transmitters comes in: It ensures that defined pressure cascades between neighboring rooms are maintained - and thus prevents the unwanted entry of particles, germs or pollutants.

Pressure Cascades: Safety through Directed Airflow

Targeted positive or negative pressure conditions ensure that air always flows from the clean to the less clean area.

Typical staggering:

Clean room: +15 Pa
Airlock: +5 Pa
Corridor: ±0 Pa

These pressure ratios must be constantly monitored and regulated - even in the event of changing operating conditions, door openings or external influences.

Typical Areas of Application

Automatisierte Produktionshalle mit zahlreichen Industrierobotern, die an Förderbändern arbeiten.

Semiconductor production and research laboratories

Clean room technology

Building automation

Individual Advice on Your Project:

Why Is Precise Room Pressure Monitoring So Important?

Goal	Benefit
Avoidance of particle entry	Protection of sensitive processes and products
Hygiene assurance	Compliance with legal norms and quality standards
Early warning of deviations	Immediate response to leaks or system faults
Validation & documentation	Proof to authorities and auditors

Energy Savings through Intelligent Pressure Control

What is often overlooked: Pressure cascades are energy-intensive.
This is because the required overpressure must be actively generated and permanently stabilized by fans. This means:
High energy consumption, especially with larger air volumes and constant air changes
Significant operating costs if too much overpressure is generated
Goal: As little overpressure as necessary - no more!
→ This is precisely why high-precision measuring systems are needed that work stably, reliably and with long-term accuracy even in the 1-10 Pa range.

Technical Requirements for Differential Pressure Measurement in Clean Rooms

Requirement	Meaning
Measuring ranges from ±25 Pa	Suitable for typical room pressure conditions
High resolution (up to 0.1 Pa)	Precise control close to setpoint
Zero point stability & low drift	No faulty controls in continuous operation
Compatibility with GLT systems	Transmission via 0-10 V, 4-20 mA, Modbus
Alarm functions & limit value monitoring	Direct reaction to deviation from set values

This technology makes it possible to maintain stable pressure conditions with minimal energy input - while ensuring maximum process and hygiene safety.

Conclusion: Precise Room Pressure Control – Efficient and Safe

Monitoring room pressure differences protects products, processes and people. Modern differential pressure transmitters make it possible to precisely control pressure cascades - while minimizing energy consumption. They combine reliability with sustainability and meet all the technical and normative requirements of modern building technology.