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Differential Pressure Transmitters

Differential pressure (DP) transmitters measure the pressure drop across filters, strainers, membranes and orifice plates — making them essential for condition-based maintenance, flow measurement and level in sealed tanks. A rising DP across a filter is the earliest, cheapest warning that it needs cleaning; a calibrated DP across an orifice is a reliable flow signal.

Three Jobs, One Instrument

Condition monitoring, flow and sealed-tank level.

Filter clog detection

DP across a filter, strainer or membrane rises as it fouls — the trigger for backwash, cleaning or cartridge change. Core to self-cleaning filters.

Flow measurement

DP across an orifice plate or venturi gives flow via the square-root relationship — a proven flow method on clean fluids.

Sealed-tank level

DP between top and bottom tappings measures level in pressurised/sealed vessels where a single transmitter can't.

Condition-based maintenance

Trended DP drives maintenance by condition, not calendar — feeding the PLC and reports.

Typical Specification

  • Accuracy ±0.05–0.1% of span
  • Low differential ranges available (mbar) for filter monitoring
  • Three- and five-valve manifolds for safe isolation and zeroing
  • Diaphragm-seal options for fouling/corrosive media
  • HART / Modbus / Foundation Fieldbus output

Cheapest condition signal you can fit

A single DP transmitter across a filter pays for itself by avoiding both premature cleaning and blinded-filter bypass — pure condition-based maintenance.

Related Instruments

Specify a differential pressure transmitter

For filter monitoring, flow or sealed-tank level — tell us the application and we will specify the DP cell, manifold, seals and signal and integrate it into your control system.

Industries We Serve

Our expertise spans multiple industries with sector-specific water treatment solutions.