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HACH COMPANY was established in 1947, in Ames, Iowa, USA. For more than 60 years, Hach has been the world market leader for Analytical Instrumentation for Complete Water Analysis, providing solutions for lab, process and field.

In 2002, GLI, a leading US manufacturer of process electro-chemistry analytical instruments, became part of the Hach Company family.

Water analysis has to be right. Our customers deserve complete, reliable solutions that they can be fully  confident in. Hach is your answer. We make water analysis simpler

Conductivity Contacting Sensors

3400 Series

Conductivity Contacting Sensors


Nominal Cell Constant (K) = 0.05, 1/2 inch NPT Kynar (PVDF) Compression Fitting, 6m (20ft) Analog Cable, Titanium Electrode

  • High Performance Design
  • Resistivity and Conductivity Measurement Capability
  • Versatile Mounting Styles
  • Full-Featured “Plug and Play” Hach sc Digital Controllers


Accuracy:± 2 % of reading above 200 µS/cm
Cable Length:20 fixed cable (6 wire, 4 conductors and two isolated shield wires)
Cell Constant k:0.05
Diameter:0.5 in ( 12.7 mm )
Electrode Material:Titanium
Flow:0 to 3 m/s maximum, fully immersed
Length:7.6 in ( 193.5 mm )
Material:Compression Fitting: KYNAR (PVDF)
Measurement Range 2:0.002 to 20 MΩ resistivity
Operating Temperature Range:-20 to 200 °C
Pressure Range:1.7 bar at 150 °C
Range:0 to 100 µS/cm conductivity
Repeatability:± 0.5 % of reading
Response Time T90:30 s
Sensor Immersion Depth:155 mm
Sensor Thread:NPT
Temperature Sensor:Pt1000 RTD
Transmission Distance:max. 1000 m when used with a termination box
max. 100 m


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