Ammonia Combination ISE ST 3021

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	1000mm
Cap Diameter	16mm
Concentration Range	0.02-17000ppm
Connector	BNC
Diameter	12mm
Endpoint time	Typically 10-60 seconds
Interferences	Hydrazine
length	155mm
pH range	11-13pH
Potential Drift	2mV per Day
Reference Type	Single Junction Ag/AgCl
Resistance at 25 Deg C	< 5 MOhm
Temperature range	5-50 Degrees C

Convenient Ammonia Monitoring with the Ammonia Combination ISE ST 3021

The Ammonia Combination ISE ST 3021 is a practical and reliable ion-selective electrode designed for the detection of ammonia (NH₃/NH₄⁺) in aqueous samples. As a combination electrode, it incorporates both the ammonia-sensitive sensing element and the reference system into a single, easy-to-use probe, making it compatible with standard ion meters for a variety of applications.

Ideal for use in environmental monitoring, wastewater treatment, aquaculture, and laboratory analysis, the ST 3021 delivers consistent performance with straightforward operation. Its robust construction ensures durability in routine testing, while its design supports stable measurements and easy maintenance for dependable ammonia ion assessment.