Filtration System Pressure Monitoring
Filtration is a critical process stage across water treatment, food & beverage production, pharmaceutical manufacturing, chemical processing, HVAC, oil & gas, and environmental engineering. Whether the filter is a sand bed, membrane module, bag filter, cartridge housing, plate-and-frame press, HEPA bank, activated carbon vessel, or inline strainer, monitoring the pressure drop (ΔP) across the filter element is the primary method for determining filter condition, triggering backwash or replacement, protecting downstream equipment, and maintaining product quality.
At Stork Solutions, we supply a comprehensive range of differential pressure transmitters, electronic pressure switches, flush-diaphragm pressure transmitters, digital pressure gauges, level sensors, PID controllers, and multichannel data loggers — all purpose-designed for the conditions found in modern filtration systems. From compact ΔP transmitters for HVAC air filters to ATEX-certified, HART®-enabled process instruments for hazardous-area liquid filtration, our products deliver the measurement accuracy, chemical resistance, and digital connectivity that filtration operations demand.
Product Spotlight for Filtration System Pressure Monitoring
Why Specialist Instrumentation Is Needed for Filtration Systems
Filtration environments present a unique combination of measurement challenges that general-purpose instruments cannot reliably address:
Progressive pressure drop — as filter media loads, ΔP increases gradually, requiring high-resolution, stable measurement to distinguish fouling trends from noise
Sudden blockage events — rapid ΔP spikes indicate filter rupture, bypass valve failure, or media collapse, demanding fast response and reliable alarm switching
Aggressive and abrasive media — chemical filtration involves acids, caustics, solvents, and slurries that attack standard sensor materials
Hygienic requirements — food, beverage, dairy, and pharmaceutical filtration demands flush-diaphragm, dead-space-free, CIP/SIP-compatible instrumentation
Hazardous atmospheres — filtration in oil & gas, petrochemical, and solvent-handling facilities requires ATEX/IECEx-certified instruments
Wide pressure range diversity — from 6 mbar across HVAC air filters to 400 bar static pressure across high-pressure membrane systems
Multi-point monitoring — large filtration plants with parallel filter banks require multichannel logging, trend analysis, and centralised alarm management
Digital integration — modern filtration systems need IO-Link, HART®, RS485 Modbus RTU, or USB connectivity for predictive maintenance and SCADA integration
Purpose-designed differential pressure instruments with appropriate wetted materials, communication protocols, and switching capabilities ensure accurate, repeatable measurement across every filtration application.
Differential Pressure Transmitters for Filter Condition Monitoring
The core measurement in any filtration system is the differential pressure across the filter element. These transmitters measure the pressure difference between the upstream (dirty side) and downstream (clean side), providing a direct indication of filter loading and condition.
DMD 331 Differential Pressure Transmitter for Liquids and Gases — 20 mbar to 16 bar | Piezoresistive stainless steel sensor (316L) | 4–20 mA / 0–10 V | ATEX Ex ia | Withstands 30× static overpressure | Compact design | The workhorse ΔP transmitter for liquid and gas filter monitoring
DMD 831 Differential Pressure Transmitter with Display and Contact — 1 bar to 70 bar | Dual piezoresistive stainless steel sensors | 4-digit LED display | Selectable P+/P−/ΔP display mode | PNP contact for filter alarm | IP 65 | Ideal for visual ΔP indication with integrated alarm at the filter housing
DMD 341 Differential Pressure Transmitter for Gases and Compressed Air — 6 mbar to 1,000 mbar | Piezoresistive silicon sensor | Aluminium housing | 4–20 mA / 0–10 V | Ideal for HVAC air filter, cleanroom HEPA bank, and compressed air filter ΔP monitoring
DPT 100 Differential Pressure Transmitter for Process Industry — 10 mbar to 20 bar | Static pressure to 400 bar | RS485 Modbus RTU | Fast response | 19″ rack mountable | For high-pressure membrane filtration and digital integration of multi-filter ΔP data
DPT 200 Differential Pressure Transmitter with HART® Communication — 1 mbar to 20 bar | Static pressure to 400 bar | HART® protocol | Rangeability 100:1 | LC display | ATEX Ex ia / Ex d | The premium ΔP transmitter for HART®-integrated process filtration with safety system connectivity
Differential Pressure Switches for Filter Blockage Alarms
Automated filter blockage alarms, backwash initiation, filter bypass activation, and maintenance alerts — providing both a switching output and an analogue signal from a single instrument:
DS 233 Differential Pressure Switch for Gases and Compressed Air — 6 mbar to 1,000 mbar | 1 or 2 PNP contacts | 4–20 mA / 0–10 V | 4-digit LED display | Ideal for compressed air filter, HVAC filter, and gas filter alarm switching
DS 200 Electronic Pressure Switch — 100 mbar to 600 bar | Up to 4 independent PNP contacts | ATEX Ex ia | Welded sensor | For high-pressure liquid filter overpressure protection and multi-threshold alarm switching
DS 400 Intelligent Electronic Pressure Switch — 100 mbar to 600 bar | Stainless steel | 1 or 2 PNP contacts | 4–20 mA | 4-digit LED display | ATEX Ex ia | For industrial filter protection, pump interlock, and water treatment filter monitoring
DS 401 Intelligent Electronic Pressure Switch — 400 mbar to 600 bar | Stainless steel | ATEX Ex ia | PVDF port option | For water/wastewater filter systems, chemical dosing interlock, and aggressive media filtration
DS 201 Electronic Pressure Switch — 400 mbar to 600 bar | Flush pressure port | ATEX Ex ia | PVDF port option | For viscous, pasty, and contaminated media filter monitoring where standard ports would clog
DS 201 P Electronic Pressure Switch — 60–400 bar | Flush stainless steel diaphragm | Cooling element to 300 °C | 1, 2, or 4 PNP contacts + analogue output | For high-temperature filtration systems in food, chemical, and polymer processing
Flush-Diaphragm Pressure Transmitters for Hygienic & Viscous Media Filtration
For filtration systems handling food products, pharmaceutical intermediates, viscous slurries, and pasty media where conventional pressure ports would clog or harbour bacteria:
DMP 331 P Industrial Pressure Transmitter — 100 mbar to 40 bar | Flush stainless steel diaphragm | 4–20 mA / 0–10 V | CIP/SIP to 150 °C | SIL 2 | Optional Hastelloy® / Tantalum diaphragm | For upstream/downstream pressure monitoring on hygienic liquid filtration systems
DMP 331 P i Precision Pressure Transmitter — 400 mbar to 40 bar | Digital signal processing | Turn-down 1:10 | Precision measurement for pharmaceutical sterile filtration and crossflow membrane systems
DMP 333P Pressure Transmitter — Flush diaphragm | Cooling element to 200 °C | For polymer melt filtration, slurry filtration, and food puree/sauce filtration where media temperature exceeds 100 °C
DMP 339P Flush Pressure Transmitter with G¼″ port — Compact flush-mount | For tight installation on inline strainer housings, manifold blocks, and modular filter skids
DMK 351 P Pressure Transmitter for the Process Industry — Capacitive ceramic sensor (99.9% Al₂O₃) | 40 mbar to 20 bar | Dead-space-free hygienic connections | IS version | For acidic beverage filtration, dairy filtration, and CIP-compatible filter monitoring where ceramic chemical resistance is required
Ceramic Sensor Transmitters for Aggressive Chemical Filtration
For filtration systems handling aggressive chemicals — acids, caustics, solvents, and cleaning agents — where ceramic sensing elements provide inherent chemical resistance without oil-fill contamination risk:
DMK 331 Industrial Pressure Transmitter — Capacitive ceramic sensor | 400 mbar to 600 bar | PVDF open port for aggressive media | ATEX Ex ia | SIL 2 | For chemical filtration, acid/caustic filter circuits, and industrial water treatment filtration
DMK 351 Pressure Transmitter — Capacitive ceramic sensor | ATEX certified | Excellent overpressure resistance | For filtration systems with pressure spike risk from sudden blockage events
ME 800 Piezoresistive Ceramic Differential Pressure Sensor with Flush Diaphragm — 4–40 bar | Al₂O₃ ceramic | Flush diaphragm | Piezoresistive differential output | Parylene coating option | For OEM filter monitoring systems, water treatment equipment manufacturers, and embedded filtration ΔP measurement
Precision Process Transmitters with HART® & SIL 2
For filtration system integration with PLC/DCS/SCADA, safety instrumented functions (SIF), and advanced predictive maintenance:
XMP i Precision Pressure Transmitter with HART® and SIL 2 — 400 mbar to 600 bar | Turn-down 1:10 | HART® | SIL 2 | Internal or flush welded diaphragm | Optional Hastelloy® / Tantalum | For safety-critical filtration in oil & gas, petrochemical, and pharmaceutical facilities
X|act i Precision Pressure Transmitter (SIL 2) — 400 mbar to 40 bar | HART® | SIL 2 | Flush welded diaphragm | Hygienic connections | For sterile pharmaceutical filtration skids and food-grade filter monitoring
X|act ci Precision Pressure Transmitter — Capacitive ceramic sensor | 160 mbar to 20 bar | HART® option | For food, beverage, and pharmaceutical filtration where ceramic chemical resistance and hygienic compliance are essential
DMP 331i / DMP 333i Precision Pressure Transmitter — 400 mbar to 600 bar | 16-bit digital signal processing | Turn-down 1:10 | Communication interface | For precision pre/post-filter pressure trending and predictive maintenance
IO-Link Smart Transmitters for Digital Filtration Management
Modern filtration systems adopting Industry 4.0 strategies benefit from IO-Link’s digital diagnostics, predictive maintenance, simplified commissioning, and parameterisation across filter banks:
DCT 533 P Industrial Pressure Transmitter with IO-Link — 100 mbar to 40 bar | IO-Link V1.1 | CIP/SIP to 150 °C | IP 67/IP 69 | Low surface roughness diaphragm | For hygienic filter skid monitoring in food, beverage, and pharmaceutical production
DCT 553 P Industrial Pressure Transmitter with IO-Link — Capacitive ceramic sensor | 40 mbar to 20 bar | IO-Link V1.1 | Dead-space-free | For acidic and aggressive media filtration with digital diagnostics
DCT 531 P Industrial Pressure Transmitter with RS485 Modbus RTU — 100 mbar to 40 bar | RS485 Modbus RTU | EHEDG certified | CIP/SIP to 150 °C | For multi-drop digital bus architectures on filtration skids
Low-Range Differential Pressure for HVAC & Cleanroom Air Filtration
HVAC air handling units, cleanroom HEPA/ULPA filter banks, and dust extraction systems require very low differential pressure measurement — often in the single millibar range:
PrimAtü 10 Low Range Differential Air Pressure Transmitter — 0.3 hPa to 1,000 hPa | Adjustable range | 4–20 mA / 0–10 V / 0–20 mA | RS485 Modbus option | IP 65 | DIN rail or wall mount | Long-term stability ≤ 0.5% FS/year | User-adjustable zero and span | For HVAC air filter ΔP, cleanroom HEPA bank monitoring, fume hood pressure, and dust collector filter condition
Level Transmitters for Filter Vessel & Sedimentation Tank Monitoring
Hydrostatic level monitoring for filter feed tanks, sedimentation basins, backwash tanks, chemical dosing vessels, and treated water storage:
LMK 351 Screw-In Level Transmitter — 40 mbar to 20 bar | Capacitive ceramic sensor (99.9% Al₂O₃) | PVDF port for aggressive media | Flush-mounted | For filter feed tank level, chemical dosing vessel level, and acid/caustic tank monitoring
LMK 331 Screw-In Level Transmitter — 400 mbar to 60 bar | Semi-flush sensor for viscous/polluted media | SIL 2 | For filter vessel level, sludge tank level, and slurry tank monitoring
LMP 331 Screw-In Level Transmitter — 100 mbar to 40 bar | 0.1% FSO accuracy option | SIL 2 | For precision backwash tank level and treated water storage
LMK 382 Stainless Steel Level Transmitter — Submersible probe | Capacitive ceramic sensor (99.9% Al₂O₃) | 40 cm to 200 m H₂O | ATEX Ex ia | For open filter bed level, sedimentation basin level, and wastewater filtration tank monitoring
LMK 387 Stainless Steel Level Transmitter — Submersible | 22 mm diameter | Ceramic flush diaphragm | ATEX Ex ia | Drinking water certification (DVGW/KTW) | Titanium housing option | For potable water filtration plants, groundwater treatment level monitoring, and narrow borehole installations
LMK 806 Plastic Level Transmitter for Aggressive Media — Plastic construction | 21 mm diameter | Ceramic flush diaphragm | For acid/alkali chemical filtration tank level monitoring where metallic probes would corrode
Electronic Pressure Switches for Pump & Valve Interlock
Gauge pressure switching on filter feed pumps, backwash valves, bypass systems, and safety relief circuits:
DS 202 Electronic Pressure Switch — 6 bar to 600 bar | 1, 2, or 4 PNP contacts | Oxygen compatible | For high-pressure membrane filtration pump protection and medical/pharmaceutical filter gas systems
DS 400 P Intelligent Electronic Pressure Switch — 100 mbar to 40 bar | Hygienic stainless steel | 1 or 2 PNP contacts | 4–20 mA | 4-digit LED display | For hygienic filter protection on food, beverage, and dairy filtration systems
DS 350 P Electronic Pressure Switch with IO-Link — IO-Link interface | Flush diaphragm | For digitally connected filter alarm switching on IO-Link bus architectures