Choose between a standard graphite sensor and a more sophisticated toroidal sensor, or stainless steel 'special' sensors for high temperature, high pressure applications

Conductivity and TDS meter

The ORAKEL range of Conductivity meters also double as a Salinity meter  and a TDS meter. The range measures conductivity in water from 0 to 2,000,000 µS/cm (range selectable). You can choose between a standard graphite sensor and a more sophisticated toroidal sensor, or stainless steel ‘special’ sensors for high temperature, high pressure conductivity measurement applications.

When connected with the ORAKEL controller it turns into one of the best water conductivity meters on the market suitable for the the online conductivity measurement of any liquid. Through the ORAKEL controller you get a variety of communication protocols, on screen display and many control options. Working as a TDS meter, the ORAKEL indicates the Total Dissolved Solids (TDS) of a solution and provides the readings on the display screen.

How it Works

Electrodes encourage microorganisms to grow on the surface of the probe before they would grow on the surfaces of a pipe or a vessel. The biological activity of the biofilm creates a signal. The controller collects and monitors that signal continually. An increasing trend in the signal indicates the onset of biofilm activity on the probe.

The controller can then take remedial action automatically by, for example, increasing or decreasing the biocide levels, triggering email or text alarms and data logging.

Total Dissolved Solids (TDS) and salinity are both measured with conductivity sensors, and the ORAKEL controllers can provide outputs and on screen displays of calculated TDS and salinity readings from the conductivity sensors. ORAKEL controllers come with standard user adjustable, factors for calculating TDS and salinity.




Our light industrial conductivity sensor utilises Graphite technology. The durable epoxy body construction provides a rugged and dependable sensor for potable water and clean water. Mount them in-line, in a pipe “T” fitting, or submerse them into a tank. For many applications, the epoxy body conductivity sensors are the lowest cost, most reliable conductivity sensor to use, especially for process applications. Rugged epoxy bodies make the sensors virtually unbreakable. These are an excellent choice to use as standard online conductivity electrodes in the water and related industries.


The toroidal inductive conductivity sensors  feature a wide measurement range and dependable toroidal technology over the range 0-2,000,000 µS/cm. Resistant to corrosion, coatings and fouling common to contacting conductivity sensors, this probe is designed for a trouble free and long service life. Noryl is the standard material of construction and has a wide solvent tolerance and temperature stability to 105ºC.  All models can be submersed by utilising the 3/4” MNPT threads on the sensor or installed in 2” NPT tees for in-line deployment. A temperature sensor is built into the conductivity sensor for automatic temperature compensation.


  • 0-1000 μs/cm
  • K – 0.1, 1, 10
  • Flow cell or pipe mounted
  • Potable, clean water


  • High temp
  • High pressure
  • Clean in place
  • Stainless steel


  • 500-2,000,000 μs/cm
  • In pipe or dip mounted
  • Dirty water
  • Noryl


All of our conductivity sensors can be used to measure salinity and TDS (Total Dissolved Solids).

product specifications


ORAKEL Conductivity datasheet

ORAKEL controller datasheet

MMS B008 – ORAKEL Product Guide1

Contact Us


+44 (0)1282 449124

Regent St
Whitewalls Industrial Estate


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