Model 566

SKU: 566

Pressure Transmitter, Large Diaphragm, Remote Electronics

The large diaphragm Delta Controls Model 566 Pressure Transmitter features an electronics housing mounted above ground for easy testing, recalibration, and inspection. When installed in a lift station, sump, basin, or other containment, the strain gauge sensor detects the liquid level as a function of the height and density of the liquid above it. 566’s electronics and calibration adjustments are contained inside the remote enclosure the with strain gauge sensor separate in the sensor body. It is of remote construction and is field repairable.

The open diaphragm cannot become plugged or rendered inoperable by liquids with high solids content such as sewage, wastewater, and slurries. The diaphragm is fabricated from tough EPDM rubber, and is coupled to the strain gauge through a nontoxic fill. The face has superior resistance to damage from gravel, and other moving solids. 566’s large three inch active face size, and its smooth outer surface makes it extremely durable and reliable in harsh services. A vent tube connected directly to the sensor compensates for atmospheric pressure changes. The optional desiccant filter, or isolation bladder, prevents condensation in the vent tube. No refilling or maintenance is required for the bladder.


  • Large, rugged EPDM rubber diaphragm isolator for wastewater and slurries
  • Supported by rigid pipe or cable
  • 4-20 mA 2-wire looped powered
  • 316 Stainless Steel or Hastelloy® C-276 body
  • PVC or TEF cable jacket
  • Calibrate, test from electronic module or HART®
  • Top side housing holds electronics
  • Optional cable junction box with isolation bladder
  • Optional HART® communication protocol compliant
  • Field repairable, modular design


  • Technology: Silicon strain gauge
  • Supply Power: 13 DCV to 35 DCV 2-wire loop powered
  • Output Signal: 4-20 mA isolated
  • Maximum Loop Impedance: 550 Ω at 24 DCV, 1100 Ω at 35 DCV
  • Protective Devices:Transient suppressors and lightning arrestors
  • Liquid Temperature: -20 °F to +220 °F (-29 °C to +104 °C)
  • Electronics Temperature: -20 °F to +180 °F (-29 °C to +82 °C)
  • Compensated Temperature:+30 °F to +130 °F (-1 °C to +54 °C)
  • Accuracy: ≥ +0.5% FS
  • Thermal Error: +0.015% FS/ ºF max
  • Barometric Effects:None
  • Over Pressure:2X range or 35 psi min (+2.5 bar)
  • Communication: Device menus, Optional HART® protocol compliant

Certifications & Approvals

  • Explosion-proof Housing Option: Third Party Listed by CSA NRTL/C (USA and Canada) Class I, Groups B, C and D; Class II, Groups E, F and G; Class III; Encl 4X:

Required Ordering Information

  • Detailed model number
  • Tag or nameplate detail (if required)
  • Factory calibration: custom range or full-scale
  • Documentation/testing tiers (if required, refer to Additional Resources in the product catalog)

Additional Information


Pressure Transmitter, Large Diaphragm, Remote Electronics

Level Measurement


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Accessories and Related Products

Example Applications