max. depth 12,000m

The conductivity sensors consists of 7 electrodes in a cylindrical arrangement. The central electrode is used to impress an alternating current into the water volume. Two pairs of sensing electrodes to the right ans left of the central electrode measure the voltage drop across them. The constant potential on the outer electrodes limits the electrical field to the inside of the cylinder and prevents any influence from boundary conditions outside the cell. The conductivity electronic holds the voltage drop across the sensing electrodes on a constant level, while the current is proportional to the actual conductivity value.

Technical data:

  • Pressure resistance: 12,000 dbar
  • Measuring range: standard: 0 – 70 mS/cm (0 – 7.0 S/m)
  • Accuracy: ± 0.002 mS/cm
  • Resolution: ± 0.005 mS/cm
  • Response time: 150 ms
  • Principle: 7-pole electrode measuring cell
  • Flange: Ø 17 mm
  • Dimension cell: 8 mm Ø, 45 mm lenght
  • Overall lenght: 120 mm
  • Material: Titanium, 2K polyurethan, quartz glass
  • Used for: CTD48, CTD48M, CTD48c, CTD48Mc, SV48M, CTD60Mc, CTD60Mc Ultradeep, CTD75M, MSS Probes

>> Show data sheet here