Model 571

SKU: 571

Pressure Transmitter, Compact Size, Sanitary Service

The Delta Controls Model 571 Pressure Transmitter was designed specifically for food, pharmaceutical, and ultraclean applications. The sensor is constructed of 100 percent 316 Stainless Steel. 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 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 mA dc transmitter
  • Tri Clamp, APC, and other sanitary connection styles available
  • Great for ultraclean and CIP service
  • Polished body is standard
  • One piece electronics/sensor module
  • Suitable for tank level measurementsSuitable for tank level measurements
  • Zero and Span pots for field recalibration
  • Spark and voltage surge protection
  • Maintenance free operation


  • Technology: Silicon strain gauge
  • Supply Power: 13 DCV to 35 DCV 2-wire loop powered
  • Output Signal :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:Zero ≤ 30%
  • POptionally Non-Interactive: ≤ 80%
  • Over Pressure:2X range 35 psi (2.5 bar) min without damage 3X range 1000 psi (70 bar) min without rupture
  • 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:± 0.5% FS or >
  • Thermal Error:± 0.02% FS/°F max
  • Barometric Effect: None

Certifications & Approvals

  • Stainless Steel Housing Options Only: Third Party Listed by CSA NRTL/C (USA and Canada)

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, Compact Size, Sanitary Service

Level Measurement


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Accessories and Related Products

Example Applications