Model 566

SKU: 566

Pressure Transmitter, Large Diaphragm, Remote Electronics

The Delta Controls Model 566 Level Transmitter is a reliable head pressure type level transmitter. The electronics and calibration adjustments are contained inside a remoted housing. The body protects the strain gage sensor. The cable is sealed to the sensor body. When installed in a lift station, sump, basin or other containment, the strain gage sensor determines the liquid level from the pressure exerted on it by the liquid height above it. Because the diaphragm is completely open to the product being measured, it cannot be plugged and rendered inoperable by liquids with high solids contents such as sewage, wastewater, and slurries. The diaphragm is fabricated from tough rubber and is coupled to the strain gage through a nontoxic oil fill. The abrasion resistant face has superior resistance to damage from gravel and other moving solids. Its large 3″ active size and its smooth outer surface make it extremely durable and reliable in harsh services.

A vent tube connected directly to the sensor compensates automatically for changes in atmospheric pressure. A desiccant filter or isolation bladder prevents condensation in the vent tube. The bladder does not require maintenance or refilling.


  • Large, Rugged BUNA-N® Rubber Diaphragm Isolator For Wastewater And Slurries
  • Supported By Rigid Pipe Or Cable
  • 4-20 mADC, 2 Wire, Intrinsically Safe
  • 316 Stainless Steel Or Hastelloy"C"® Body
  • PVC Or TEF Cable Jacket
  • Zero & Span Pots For Field Recalibration
  • Calibrate, Test From Electronic Module
  • Spark & Voltage Surge Protection
  • Top Side Housing Holds Electronics
  • Field Repairable; Modular Design
  • Can Be Used In Pressurized Tanks


  • Technology: Silicon strain gage
  • Supply Power: 13 to 35 VDC 2 wire loop powered
  • Output: 4-20 mADC isolated, Intrinsically Safe
  • Loop Impedance: 550 ohms at 24 VDC. 1100 ohms at 35 VDC
  • Adjustments: Span from 30% to 100% of sensor range, Zero to 30% basic; non-interactive.
  • Protective Devices: Transient suppressers for voltage surge
  • Temperature Range:
    • -20 to +220°F (-30 to +105°C) Process
    • -20 to +180°F (-30 to +85°C) Electronics
    • 30 to +130°F (-1 to +55°C) Compensated (Higher Available)
  • Accuracy: ± 0.25% F.S. or better
  • Thermal Error: ± 0.02% F.S. / °F maximum
  • Over Pressure: 2x rated pressure range; 35 PSI (2.5 Bar) minimum


Sewage Lift Stations, Lime Slurry, Aerobic Digestors, Drilling mud, Retention Basins, Latex Paint, Alum Tanks, Catch Tanks, Wastewater Sumps, Oil Field Slop Tanks.

Optional Features

  • Large LCD; readout in engineering units
  • DC Power Supply for loop and alarms in housing
  • Alarm Module (1 or 2); SPDT, 5 amp contacts
  • Liquid Temperature Transmitter; Operates over an additional 2 wire, 4-20 mADC loop.
  • Pump Controller: Model 352, 354, 358 or 360

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