Precise Filter Monitoring with Pressure Sensors

With precise pressure sensors, the clogging degree of a filter can be continuously and reliably determined in order to optimize maintenance intervals, prevent system failures, and ensure process quality.

Differential Pressure Measurement for Filter Monitoring

Pressure is measured upstream and downstream of the filter and routed to a differential pressure sensor. The measured differential pressure across the filter serves as a direct indicator of its clogging level:

• An increasing differential pressure signals an increasing accumulation of particles.
• Conversely, if the pressure drop falls to zero, this indicates a torn filter or a leak.

Through the continuous recording of differential pressure, maintenance measures can be planned based on actual demand, automated alerts can be transmitted to the system controller, and unplanned downtimes can be avoided.

Selecting the Right Pressure Sensors for Your Filter Monitoring

The core requirements for sensors in filtration systems include high accuracy and media compatibility. Key selection criteria are:

• Medium to be measured: To ensure chemical resistance. DDM Sensors pressure sensors offer wetted parts made of seal-free, welded 316L stainless steel.
• Process pressure: Can be up to 400 bar.
• Expected differential pressure
• Required temperature range: With a temperature compensation of -40 °C to +125 °C, we also enable use in high-temperature environments.
• Required accuracy across the entire temperature range
• Available installation space

Drucksensoren für die Filterüberwachung von DDM Sensors

Specifications of DDM Pressure Sensors at a Glance

The PV2722 and PX2722 pressure sensors from DDM Sensors are designed for precise filter monitoring in demanding environments. Media compatibility includes air, gases, oils, water, and aggressive fluids, utilizing wetted parts made of materials such as stainless steel (1.4404 / 316L, 1.4435) and optional FDA-compliant materials. High overpressure resistance ensures reliability during pressure peaks. The pressure sensors are available in various sizes.

Technical Data of Our Pressure Sensors for Filter Monitoring

Feature	PV2722	PX2722
Measuring Range	100 mbar to 3.5 bar differential pressure	100 mbar to 3.5 bar differential pressure (also bidirectional)
Total Error	$\le 1.5\%$ of full scale (standard), optional $\le 1.0\%$ or $\le 0.5\%$	$\le 1.5\%$ of full scale (standard), optional $\le 1.0\%$ or $\le 0.5\%$
Operating Temperature Range	-40 °C to +125 °C	-40 °C to +125 °C
Wetted Materials	Stainless steel 1.4404, 1.4435	Stainless steel 1.4404, 1.4435
Output Signal	0–5 V / 1–6 V	4–20 mA (two-wire)
Electrical Connection	MIL connector / Cable / M12x1	MIL-C26482 connector, M12x1, cable (shielded)
Protection Class	IP67	IP67
Overload Limit	200 to 400 %	200% to 400% (depending on the measuring range)

Filter Monitoring Application Cases

Hydraulic Filters in Machinery and Vehicles

In hydraulic systems of machinery and vehicles, monitoring suction, pressure, and return filters is essential. Our pressure sensors precisely detect the clogging level of these filters, helping to protect sensitive components such as pumps and valves. By signaling a necessary filter change in a timely manner, costly system failures are avoided and the lifespan of the equipment is extended.

Air Filters in HVAC Systems and Cleanrooms

Monitoring air filters in HVAC (Heating, Ventilation, Air Conditioning) systems and cleanrooms is about ensuring the required air quality and complying with strict standards such as VDI 6022 or DIN 1946-4. Our differential pressure sensors enable energy-efficient operation of fans by indicating the optimal time for a filter replacement, thereby reducing operating costs.

Water Treatment and Membrane Filters

In water treatment, particularly in processes like reverse osmosis, monitoring pre-filters and membranes is crucial for process reliability and efficiency. Through the continuous measurement of differential pressure, the function of the filter stages is secured, the protection of downstream components is guaranteed, and water consumption is optimized. This leads to higher plant availability and a consistently high water quality.

Medical Technology

In medical technology, the reliability of filter systems is of vital importance. Our pressure sensors are used for filter monitoring in ventilators as well as for status monitoring in infusion and dialysis systems. Precise monitoring ensures that filters function properly, contributing directly to ensuring sterility and patient safety.

Fuel and Oil Filters in Engines and Turbines

In mobile and stationary applications such as engines and turbines, fuel and oil filters protect the lubrication circuit from harmful particles. Continuous monitoring of the filter condition by differential pressure sensors is critical to maintain engine performance and secure component longevity. This effectively prevents costly damage caused by contaminated operating fluids.

Industrial Process Filters

In the food, beverage, and pharmaceutical industries, product purity is of paramount importance. Our pressure sensors monitor the filters in critical production processes, ensuring compliance with the highest quality standards. By using sensors with wetted parts made of stainless steel or FDA-compliant materials, product purity and quality are consistently guaranteed.

Integration and Support by DDM Sensors

We support you not only in selecting the right pressure sensor but also offer comprehensive application consulting. For a seamless integration, we provide CAD data and technical drawings, and implement application-specific modifications if required. Furthermore, our sensors are designed so that a simple retrofitting into existing systems is possible without complications.

Find the Right Pressure Sensor for Your Filter Monitoring

Contact us to find the optimal sensor solution for your specific application. We look forward to advising you on the selection of the right pressure sensor for your filter monitoring.