Differential Pressure
Article Published: November 13, 2025 4:23 PM
Last Updated: February 11, 2026 12:44 PM
Written by: Jack Carr
What is Differential Pressure?
Differential pressure refers to the difference in pressure between two points within a system. It’s a critical measurement in many industrial and commercial applications, helping to monitor and control systems where pressure differences can impact performance, safety and efficiency.
For example, in HVAC systems, measuring differential pressure across filters ensures optimal airflow and indicates when maintenance is required. In cleanrooms and laboratories, it helps maintain sterile environments by monitoring pressure between rooms.
Why is Measuring Differential Pressure Important?
Monitoring sensor differential pressure is essential in applications where pressure differences can affect system integrity or product quality. Key benefits include:
- Ensuring proper airflow in ventilation and HVAC systems.
- Maintaining sterile environments in cleanrooms and hospitals.
- Monitoring filter performance to prevent blockages.
- Enhancing energy efficiency in building management systems.
- Supporting safety in industrial processes and gas handling systems.
Explore our full range of differential pressure sensors and air pressure sensors to find the right solution for your application.
Setra are Leaders in Differential Pressure Sensors
We proudly supply Setra, a globally recognised manufacturer of high-performance differential pressure sensors. Known for their precision and reliability, Setra’s sensors are trusted across critical environments including:
- Cleanrooms and isolation rooms.
- Pharmaceutical manufacturing.
- HVAC and building automation.
- Industrial process control.
Setra’s sensors offer features such as high accuracy, low pressure ranges and robust construction. Learn more about Setra on our dedicated manufacturer page.
All of their premium pressure sensor range is built using capacitance sensing technology.
Our Star Differential Pressure Sensors
We offer a selection of trusted differential pressure sensors from Setra, including:
MR1/MR2 Multi Range DP Sensor
The MR1 & MR2 sensors are compact, multi-range sensors ideal for building automation and HVAC applications. These models offer field-selectable pressure ranges and output types for flexible integration.
267 Industry Standard DP Sensor
The 267 (or PA-267) sensor is designed for ultra-low pressure applications, providing high accuracy and stability, making it perfect for cleanroom monitoring and filter status detection.
264 Economy DP Sensor
The 264 cost-effective DP sensor is a reliable solution for general HVAC and environmental monitoring. The 264 is known for its long-term stability and ease of installation.
Each model is engineered to deliver dependable performance in demanding environments. Contact us to discuss which sensor best suits your needs.
Spotlight on the Setra LITE
The Setra LITE Room Pressure Monitor is a compact, cost-effective solution for monitoring differential pressure in critical environments. Designed for simplicity and performance, it’s ideal for:
- Hospital isolation rooms (trusted by the NHS).
- Laboratories and cleanrooms.
- Pharmaceutical production areas.
- Negative pressure rooms.
Key Room Pressure Monitor Features
- Intuitive touchscreen interface.
- Visual and audible alarms for pressure deviations.
- Easy installation with minimal configuration.
- Compatibility with existing building management systems.
The Setra LITE ensures continuous, reliable monitoring to maintain compliance and safety standards.
Applications of Differential Pressure Measurement
Differential pressure plays a vital role in a wide range of industries. Common applications include:
- Monitoring air filters in HVAC systems to optimise performance.
- Ensuring pressure cascades in cleanroom environments.
- Measuring flow rates in ducts and pipes.
- Detecting leaks in gas distribution systems.
- Managing pressure in pharmaceutical and food processing facilities.
- Liquid cooling circuit monitoring in data centres.
Types of Pressure Measurements
Understanding the different types of pressure measurement is essential when selecting the right sensor for your application:
- Gauge Pressure – measures pressure relative to atmospheric pressure.
- Absolute Pressure – measures pressure relative to a perfect vacuum.
- Vacuum Pressure – measures pressure below atmospheric pressure.
- Compound Pressure – measures both positive and negative (vacuum) pressures.
Each type serves a specific purpose. For a deeper dive, read our blog on types of pressure sensors.
Contact Us for Expert Advice
With decades of experience in pressure and flow control, we’re here to help you find the right differential pressure solution for your application. Whether you’re working in HVAC, cleanroom environments or industrial processing, our team can guide you to the most suitable differential pressure sensor or air pressure sensor.
Visit our home page to learn more about our expertise or contact us directly for tailored support.
FAQs
What is differential pressure used for?
Differential pressure is used to measure the difference in pressure between two points. It’s commonly applied in HVAC systems, cleanrooms and industrial processes to monitor flow, detect leaks and ensure safety.
How does a differential pressure sensor work?
These sensors measure the pressure difference between two ports. The sensor converts this difference into an electrical signal that can be monitored and used for control or alert systems.
Why is room pressure monitoring important in healthcare?
Maintaining correct room pressure is critical in healthcare to prevent cross-contamination. Positive pressure keeps contaminants out, while negative pressure contains them within a space.
Which Setra pressure sensors are best for differential pressure?
Setra’s MR1/MR2, 267 and 264 series are top choices for differential pressure monitoring. Each offers unique features tailored to specific applications, from cleanrooms to HVAC systems.
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