Model 566

SKU: 566

Pressure Transmitter, Large Diaphragm, Remote Electronics

The Delta Controls Model 566 Pressure 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 gauge sensor. The cable is sealed to the sensor body. When installed in a lift station, sump, basin or other containment, the strain gauge 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 gauge through a nontoxic oil fill. The abrasion resistant face has superior resistance to damage from gravel and other moving solids. Its large, three inch 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 EPDM rubber diaphragm isolator for wastewater and slurries
  • Supported by rigid pipe or cable
  • 4-20 mA dc, 2-wire
  • 316 Stainless Steel or Hastelloy® C-276 body
  • PVC or TEF cable jacket
  • Zero and Span pots for field recalibration
  • Calibrate, test from electronic module
  • Top side housing holds electronics
  • Field repairable, modular design
  • Can be used in pressurized tanks


  • Technology: Silicon strain gauge
  • Supply Power: 13 DCV to 35 DCV 2-wire loop powered
  • Output: 4-20 mA dc isolated
  • Loop Impedance: 550 Ω at 24 DCV, 1100 Ω at 35 DCV
  • Adjustments (Span): 30% ≤ 100% of sensor range
  • Basic Non-interactive: Zero ≤ 30%
  • Protective Devices: Transient suppressors for voltage surge
  • Temperature Range:
  • Process: 20 °F to +220 °F (-29 °C to +104 °C)
  • Electronics: -20 °F to +180 °F (-29 °C to +85 °C)
  • Compensated: +30 °F to +130 °F (-1 °C to +55 °C), higher available
  • Accuracy: ± 0.25% FS or >
  • Thermal Error: ± 0.02% FS/°F max
  • Over Pressure: 2X rated pressure range; 35 psi (2.5 bar) min

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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