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TE Connectivity (TE) has long set the standard for quality environmental monitoring instruments.  Now, our next generation of data logger, the TruBlue 288CT, combines precision and performance along with rugged reliability. The 288CT is a multi-depth sensor array connected on one cable. This methodization is used to characterize conductivity and temperature at various levels in a well or open channel. This model is made with 316 stainless steel or titanium with a fully sealed design and advanced, power-conserving microcomputer technology. The 288 logs conductivity and temperature for over five years and is battery operated, so it does not require onsite power.  The TruBlue 288 CT multi data logging system is an excellent choice when making several measurements of conductivity and temperature at different levels on a single cable.


  • One cable installation, multiple sensors
  • Two-year warranty
  • Simple set-up and data retrieval
  • Real-time instrument status/data graphs
  • RS-485 or SDI-12 communication interface


  • 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

  • Sensor Type  Water Level Data Logger

  • Type  Conductivity

Configuration Features

  • Pressure Port/Fitting  Ported

  • Electrical Connection  Internal Battery

Electrical Characteristics

  • Supply Voltage (V) 3.6 Internal Lithium Battery

Body Features

  • Port Material  316 SS, Titanium


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

  • Accuracy  1% of reading or 20μS/cm

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


  • Options  Extended Auxillary Battery

Related Materials

Datasheets & Catalog Pages

Product Specifications

Purchase Specification

Manuals & User Guides

Agency Approvals

Agency Approval Document

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