Delta Tube Averaging Pitot Tubes – Flow Rate Sensors

The Delta Tube ® is a low cost, low maintenance, high accuracy flow sensor for use on steam, gas and liquid flow applications.

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321322p
321322d
323

Mid-West Instrument: Delta Tubes – Averaging Pitot Tubes

Manufactured based on proven design of Mid-West, USA, these are rugged in construction, and simple to install. The flow sensor is a multi-ported averaging pitot tube which spans the entire flow profile and produces differential pressure which has square root relationship with flow rate. Based on pipe or duct size the Delta Tube is constructed so that strategically located sensing ports continually sample the impact and static pressures produced by the Delta tube’s obstruction of the flow stream profile. Within the probe the impact pressures sensed by the upstream are continually averaged in an isolated plenum chamber. Similarly the static pressures sensed by the downstream ports are averaged in a second isolated plenum chamber. All conventional secondary instruments can be used for direct measurement, or transmission of the differential pressure produced by the Delta Tube which is proportional to square of flow rate.

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Mid-West Averaging Pitot Tube – Flow Rate Sensor Models

Mid West Model 300 Cmc

Model 300

  • In-line series with built-in Delta tubes
  • Connects via screw, weld, or flange
  • Fits line sizes from ½” to 3″
301302 3

Model 301 & Model 302 (discontinued models, refer to SKI product alternatives below)

  • Direct insert type Delta Tubes
  • Suitable for line sizes from 3″ to 36″
  • Probe and head material: 316 SS; hardware: CS or 316 SS
307

Model 307 & Model 308 (discontinued models, refer to SKI product alternatives below)

  • Direct insert type for ducts/pipes sized 6″ to 72″
  • Special sizes up to 144″ available on request
  • Probe, head, and hardware material: 316 SS
321322p

Models 311, 321, 331,312, 322, 332 (discontinued models, refer to SKI product alternatives below)

  • Wet tap type with insert-retract facility and threaded fittings
  • Low pressure (311, 312) with hand insertion; high pressure (321, 322, 331, 332) with insert retract rods
  • Line size: 3″ to 24″ (311, 321, 331), 3″ to 60″ (312, 322, 332)
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Model 323 (discontinued models, refer to SKI product alternatives below)

  • Wet tap type with retractable facility and flanged connections.
  • Suitable for line sizes 14″ to 72″.
  • Probe material: 316 SS; hardware: CS or 316 SS.
341342343

Models 341, 342, 343 (discontinued models, refer to SKI product alternatives below)

  • Flange mounted for line sizes 3″ to 72″.
  • Probe and head material: 316 SS; hardware: CS or 316 SS.
  • Installed by welding flange on weld-o-let; single or double support types available.

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SKI: SDF Sensor – Averaging Pitot Tubes – Gases, Liquids & Steam

Ski Sdf Flow Sensor Cmc

SKI SDF-Sensors are using the averaging pitot tube technology and can be used wherever flow rates of gases or liquids are to be measured. They have been proven in practice to be reliable, stable and accurate for more than 25 years.

SDF-Sensors for steam probes are used wherever flow or heat quantity of superheated or satured steam is to be measured. They have been proven in practice to be reliable, stable and accurate for more than 25 years.

Due to the robust technology and the simple principle of measurement averaging pitot tubes  can be used in many different ways even under difficult conditions and offer considerable advantages over other measuring technology from easy installation to long-term measuring stability.

Further special advantages are the possibilities of bidirectional flow measurement as well as the integration of temperature and pressure measurement.

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