CT2X Water Conductivity Data Logger

  • Conductivity Measurement Range Choice of ranges - 0 to 100,000, 0 to 200,000 or 0 - 300,000 microSiemens/cm
  • Optional Depth/Level Option Gauge or absolute ranges available
  • Barometric Compensation Compensation utility for use with absolute sensors
  • Built-In Datalogger Non-volatile memory can store 349,000 records
Product Options


The CT2X water conductivity logger is a submersible conductivity / temperature sensor with an integral water level/depth datalogger. A 4-pole epoxy / graphite electrode cell is incorporated making it perfect for rugged field applications. Fringe field interference errors are reduced, inaccuracy caused by polarization effects is decreased and contact resistance problems are reduced by this technology.

Over 349,000 records of conductivity, temperature, depth and time data can be stored with the non volatile memory.

It has a slim 0.75” diameter and a 316 Stainless Steel, Viton and PTFE/FEP. Titanium is available on request.

The water conductivity logger is powered by two internal AA batteries or can be powered by an external auxiliary power supply for data intensive or SDI-12 applications.

The CT2X CTD logger can be easily networked with other Smart Sensors with the industry standard RS485. Modbus and SDI-12 protocols are available which makes ideal for the Adcon telemetry system.

Aqua4Plus software, gives the user extensive control, flexible programming and real time monitoring. The data can then be easily exported to spreadsheets and databases.

The CT2X water conductivity logger is available with or without cable. Choices of polyurethane, polythene and PTFE/FEP are available. Unlike some manufacturers you are not charged the earth for connectors and cable!

Other features:

  • Measures water conductivity, depth. total dissolved solids, salinity and temperature
  • Linear and non-linear temperature compensation feature

Manufactured by: INW
Model: CT2X Water Conductivity Data Logger

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Salinity ingress
Borehole monitoring
Conductivity studies
Level monitoring


Length 12.5” (31.8 cm)
16.0” (40.6 cm) w/ pressure
Diameter 0.75” (1.9 cm)
Weight 1.0lb. (0.5 kg)
Body Material Delrin® & 316 stainless or titanium
Wire Seal Materials Viton® and PTFE/FEP
Submersible Cable Polyurethane, polyethylene, or FEP
Cable Weight 4lbs./100 ft (1.8 kg/30 m)
Protection Rating IP68, NEMA 6P
Desiccant 1-3mm indicating silica gel (high or
standard capacity)
Terminating Connector Available
Communication RS485 Modbus® RTU
SDI-12 (ver.1.3)
Operating Temp. Range3 -15°C to 55°C
Storage Temp. Range1 -40° C to 80°C
Memory 4MB - 349,000 records
Log Types Variable, user-defined, logarithmic, profiled
Programmable Baud Rate 9600, 19200, 38400
Logging Rate 4x/sec maximum
Software Complimentary Aqua4Plus or
Networking 32 available addresses per junction w/ batching capabilities (up to 255)
File Formats .xls / .csv / .a4d
Internal Battery 2x1.5V AA Alkaline2
Auxiliary Power 12VDC - Nominal
6-15VDC - Range
Exp. Alkaline Battery Life 12 months at 15m polling interval7
Element Type 30K ohm thermistor
Element Material Epoxy bead/external housing
Accuracy ± 0.2°C
Resolution 0.1° C
Range -5°C to 60°C
Units Celsius, Fahrenheit, Kelvin
Probe Material Epoxy/Graphite
Electrode 4-pole
Static Accuracy ± 0.5% of measured value
Resolution 32 bit
Ranges Conductivity6:
0-100,000 or 0-200,000 or 0-300,000 µS/cm
4.9-49,000 or 4.9-98,000 or 4.9-147,000 mg/L
2-42 PSU
Units µS/cm, mS/cm, mg/L, PSU
Resolution 0.1 µS/cm / 0.001 mS/cm / 0.1 mg/L (TDS) / 0.001 PSU
Warm-Up Time 200 msec
Thermal Compensation None, linear, or nLFn
1Storage without batteries
2Lithium available upon request
3Requires freeze protection kit if using pressure option in water below freezing
4Burst reduced at PSI>300
5Higher pressure ratings available upon request
6Accuracy reduced at levels <10 µS/cm
7May vary due to environmental factors


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