Ammonia Combination ISE

Description :

The Dintok Co direction Ammonia combination ISE is a traditional pH glass sensor with a refillable membrane cap.

This electrode does not have the solid state advantage of the Ammonium ISE but is able to detect dissolved Ammonia down to around 50ppb. For successful operation NaOH ISAB should be added to the samples and standards to ensure all the Ammonium is converted to NH3. The analysis is best done in 100ml conical flasks to reduce the loss of NH3 gas.

In principle the Ammonia penetrates the membrane and causes a change in the pH of the internal solution locally at the interface. This pH change is directly proportianal to NH3 concentration. Each Dintok Co directION Combination ISE has a 1 meter cable and a BNC connector (other connectors available on request) allowing use on all types of pH/ION meter including laboratory bench and research models.

Dintok are a Germany based manufacturer and produce ISEs for many prominent companies in the water testing sector. As a result our ISEs are very competitively priced and come complete with technical support provided from our vast library of applications and our in house electrochemistry technicians.

For optimum results use Dintok Co direction standards and Ionic Strength Adjustment Buffers ( ISABs).



specification :

Body Type

Polymer body with replaceable membrane caps.

Cable length


Cap Diameter


Concentration Range






Endpoint time

Typically 10-60 seconds





pH range


Potential Drift

2mV per Day

Reference Type

Single Junction Ag/AgCl

Resistance at 25 Deg C

< 5 MOhm

Temperature range

5-50 Degrees C

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