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Our next generation of water level data logger models – the TruBlue 585 CTD data logger combines precision, perfor-mance, and rugged reliability like no other instrument available today.  Designed to deliver time and time again in even the harshest conditions, the TruBlue 585 CTD data logger is battery powered and made with 316 stainless steel or titanium. A fully sealed design and advanced, power-conserving microcomputer technology enables it to log level (depth) and temperature for up to five years. Since these units do not require onsite power or a programmable logic controller (PLC), a terminal box isn’t necessary. The TruBlue 585 CTD data logger is the perfect choice to measure conductivity and depth when reliability, accuracy and precision matter. 


  • Level Accuracy of ±0.05% FS TEB
  • Conductivity Accuracy 1% of reading or 20 microsiemen/centimeter
  • Five year permanent battery
  • 8 MB internal memory for up to 550,000 data points
  • New free user-friendly TruWare software for PC or Mobile included 


  • Aquifer Characterization and Pump Tests
  • Saltwater Intrusion Studies
  • Flood and Storm Surge
  • Tide Gauging
  • Oceanographic Research
  • Surface Water Monitoring
  • Groundwater Monitoring 


Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Water-Level Sensor Type  Water Level Data Logger

  • Water-Level Sensor Style  Absolute, Vented Gage

Configuration Features

  • Pressure Port/Fitting  Ported

  • Electrical Connection  Internal Battery

Electrical Characteristics

  • Water-Level Sensor Supply Voltage (V) 3.6 Internal Lithium Battery

Body Features

  • Port Material  Stainless Steel, Titanium

Usage Conditions

  • Operating Temperature Range  0 – 50 °C [ 32 – 122 °F ]


  • Pressure Range  0 – 100 psi, 0 – 125 psi, 0 – 15 psi, 0 – 22 psi, 0 – 30 psi, 0 – 300 psi, 0 – 5 psi, 0 – 50 psi

  • Water-Level Sensor Accuracy  ± .05% TEB

  • Output/Span  RS-485 with SDI-12 Protocol, SDI-12

  • Proof Pressure Range  3X FS (600 psi Max)


  • Options  Extended Auxillary Battery

Reference Number

  • TE Internal Number CAT-WLS0033

Related Materials

Datasheets & Catalog Pages

Product Specifications

Manuals & User Guides

Agency Approvals

Agency Approval Document