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Minimum Order Quantity of 10 Items.
  • 500 / 501
  • Usually ships in 4 weeks



  • Level Ranges up to 230ft (70m) H2O
  • Accuracy: ±0.05% Total Error Band
  • SDI-12 Communication Interface
  • Welded 316 SS or Titanium Construction
  • On-board Surge Protection
  • Resolution:
    • Level; ±0.0001%FS
    • Temperature; ±0.001ºC
    • Excitation; ±0.1 VDC
  • Operating Temp: -4 to 140°F


The KPSI 500 submersible hydrostatic level transducer represents the leading edge of level sensing technology available today. Incorporating a highly stable media-isolated sensor, the KPSI 500 features SDI-12 serial-digital interface. SDI-12 is a standard for interfacing data recorders with microprocessor-based sensors, especially in the environmental monitoring field. The transducer meets the demanding requirements of the USGS Office of Surface Water (OSW) accuracy specification for stage monitoring.

The 500 Model features:

  • Range of 10ft to 230ft H2O
  • SDI-12 Standard
  • Accuracy: ±0.05%FS TEB / ±0.10%FS TEB

The 501 Model features:

  • Range of 10 to 50ftH2O
  • For applications with high accuracy is necessary
  • Accuracy: ±0.01ftH2O / ±0.10% reading
  • SDI-12, OSW Spec

Applications include:

  • Surface water monitoring
  • Tailrace and forebay monitoring
  • Oceanographic research
  • Ground water monitoring
  • Down hole


This product can be used in the following applications: