Model 552

SKU: 552

Pressure Transmitter, Modular Electronics

The Delta Controls Model 552 Pressure Transmitter consists of a potted electronic module and a modular pressure sensor assembly packaged as an integral unit. The sensor includes an oil filled 316-L S.S. or platinum diaphragm which isolates the strain gage bridge from the process liquid or gas. The back of the sensor is usually vented to atmosphere to compensate for barometric pressure changes. The electronics module is potted in a dual system of silicon rubber and epoxy to protect against moisture, corrosion, and vibration.

The Delta Controls Model 552 is commonly used as a liquid level transmitter in tanks. The pressure at the bottom of a vented tank containing a liquid is linearly proportional to the height and density of the liquid. The “TPC” gas space pressure corrector option is required for pressurized tanks.


  • General Purpose Pressure/Level Service
  • Separate Electronics Module And Sensor
  • Heavy Duty Rugged Body
  • Measures Liquid Level In Pressurized Tanks
  • Electronics Module is Sealed in Potting; Can Be Remoted
  • Ranges From 12 Inches Water To 1000 PSI (0.3 to 70 Bar)
  • Zero & Span Pots For Field Recalibration
  • Spark & Voltage Surge Protection
  • Optional Selectable Dampening
  • Optional LCD Display (in Engineering Units)
  • Optional Integral Power Supply Module
  • Optional Integral Alarm Module(s)
  • Maintenance Free Operation


  • Technology: Silicon Strain gage.
  • Supply Power: 13 to 35 VDC 2 Wire Loop Powered.
  • Output: 4-20 mADC, Isolated
  • Loop Impedance: 550 ohms at 24 VDC. 1100 ohms at 35 VDC, maximum
  • 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) without damage; 3X Range (1000 PSI / 70 Bar min) without rupture minimum
  • 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

Optional Features

  • Dampening: Selectable 0.1 to 22 seconds
  • Indicator: Large LCD display (in Engineering Units)
  • DC Power Supply*: Integral VAC to 24 VDC.
  • Alarm Module(s)*: Integral 5 amp SPDT.
  • TPC Corrector: Used When Measuring Level In Pressurized Tanks

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