Graphene Ion Sensor

Graphene Ion sensor For monitoring
electrolytes in urine

Excess electrolytes and waste products in the body are excreted through urine, and quantitative changes appear depending on food intake and health status. Since a change in the amount of electrolytes in urine means a change in your health, monitoring of electrolytes in urine can help you manage your health. G-Sensor can test electrolyte levels that were not possible with conventional urine test strips. Here we introduce a new way to monitor individual electrolyte levels

01 Feature

Urine diagnosis system

G-sensor can be easily used by anyone, anytime, anywhere.

Easily measure electrolyte
levels in urine with high precision and high reliability through disposable diagnostic sensors and portable measuring devices.

Mobile application

You can monitor your health status according to the level of electrolytes in your urine through mobile app.

Take care of your health with regular daily checkups and tracking health records.

02 Market background


Urine electrolyte tests can only be done in hospitals.

✓ The 24-hour urine collection method is very cumbersome.
✓ The burden of medical expenses and other incidental. expenses is high.

Commercial equipment is large and expensive and requires skilled personnel to use.

Portable equipment for diagnosing electrolytes in urine has not been developed.


Make diagnostic kits that can be used anytime, anywhere

Make sensor and test device portable

Make inexpensive precision sensor tips to reduce user burden

03 Test electrolytes & Hazardous disease

Test electrolytes

Hazardous disease (Excessive or deficient electrolytes)


hyper-&hypo-natremia, dehydration, nephrotic syndrome, kidney disease, liver disease, cirrhosis


hyper-&hypo-kalemia, kidney disease, hyporeflexia, arrhythmias, cirrhosis


chronic liver failure, urinary tract infection, diabetes


kidney disease (salt-losing nephropathy), polyuria, potassium depletion

04 Product Details


Disposable ion monitoring sensor (Na+, K+, H+, Cl- available)

Measuring Device Size: 189 X 90 X 30 Weight: 212 g)

Sensitivity (58 mV/Decade)

Expandability (Antibodies, DNA, gas sensors, etc.)


G-ISFET(Graphene-Ion Sensitive Field Effect Transistor)

G-ISFET has the advantage of being able to make it smaller than the conventional rod-type ISE through the semiconductor
manufacturing process.

MCK Tech Co., Ltd. Has developed a new graphene-based reference electrode compatible with the semiconductor manufacturing process of G-ISFET. (PCT/KR2020/016911, PCT/KR2020/004710 and 3 others)

Our patent technology can realize the miniaturization and mass production of G-ISFET by solving the structural problem of Ag/AgCl reference electrodes used in conventional ISE and ISFET.

Development of a new reference electrode

Solving the problems of the conventional reference electrode

  • Easily fragile
  • Require an internal
    filling solution
  • Difficult to miniaturize
  • Expensive

Sensing results

Sensitivity and selectivity is confirmed using mixed solution of sodium ion and interfering ions

Excellent sensitivity are observed in the range of several to hundreds of mM (10-3 to 100 mM)