Precision of 50ppm


No chemical use


Real-time, online results

How it works

A capacitive technique measures the capacitance changes from the introduction of a di-electric substance. In this case, both oil and water are insulators and have superior and distinctive difference in di-electric constant or the insulation value.  


The measuring method consists of two conductive electrodes with a non-conductive layer between them. The non-conductive layer is typically a metal oxide or a special polymer. The capacitance of this layer changes with water content and causes a change in voltage between the two conductive electrodes.


In addition, the micro-capacitance technique resolves all types of interferences to the test results, including presence of acid in water, alkali concentration and ion concentration.


The principle of micro-capacitance measurement for water in crude oil is not the same as to the traditional capacitance technique. There are differences in many techniques such as:


  • Instrument structure
  • Presence of electrodes
  • Characteristic of electrostatic field
  • Reduction or elimination of impurities caused by pressure density
  • Salinity
  • Composition of hydrocarbons in crude oil
  • Gas, temperature, density, frequency and other factors

Applicable Industries





Technology Enterprise Award 2017, Spring Singapore

Emerging Enterprise Award 2017 (Best Innovation)

As featured on The Business Times.