Model 571

SKU: 571

Pressure Transmitter, Compact Size, Sanitary Service

The Delta Controls Model 571 Level and Pressure Transmitter was designed specifically for food, pharmaceutical and ultraclean applications. The sensor is constructed of 100% 316 S.S. It is completely free from process wetted crevices, cracks, and voids that can harbor contaminants. The back of the sensor assembly is usually vented to atmosphere to compensate for barometric pressure changes.

The electronics and sensor are sealed and potted as an inner module which is located in the stem of the transmitter. The small overall size of this instrument makes it ideal for mounting in confined spaces that would not accommodate standard transmitters.

The Delta Controls Model 571 is commonly used as a liquid level transmitter in vented tanks. The pressure at the bottom of a vented tank containing fluid is linearly proportional to the height and density of the fluid above the sensor.


  • Two Wire Loop Powered 4-20 mADC Transmitter
  • Fits Ladish, APC, And Other Sanitary Connection Styles
  • Great For Ultraclean And CIP Service
  • Polished Body Is Basic, Polished Housing Optional
  • One Piece Electronics / Sensor Module
  • Suitable For Tank Level Measurements
  • Zero & Span Pots For Field Recalibration
  • Spark & Voltage Surge Protection
  • Maintenance Free Operation


  • Technology: Silicon strain gage
  • Supply Power: 13 to 35 VDC 2 wire loop powered
  • Output Signal: 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, and to 80% optionally, non-interactive.
  • Over Pressure: 2X Range (35 PSI / 2.5 Bar min) w/o damage; 3X Range (1000 PSI / 70 Bar min) w/o rupture
  • Temperature Range:
    • -20 to +220°F (-30 to 105°C) Process
    • -20 to +185°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
  • Barometric Effect: None


Ultraclean Water, Fruit Juice, Fermentation Tanks, Vegetable Oil, Milk Processing, Beer, Wine, Spirits, Candy Making, Pharmaceutical Reactors.

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