Hach Ammonia Combination Electrode

Details:

The Hach Ammonia Electrode measures ammonia gas or ammonium ions in aqueous solutions that have been converted to gas by the addition of a strong base. The electrode is a
complete electrochemical cell consisting of a glass pH electrode and a reference electrode.

The gas-permeable membrane separates the sample from a thin layer of electrolyte that is pressed between the pH bulb and the membrane. At high pH, ammonium is converted to ammonia gas. The gas diffuses through the membrane and causes a pH change in the thin layer of electrolyte. The potential across the pH glass changes as a result of the pH change and the electrode measures the change in potential. The measured pH change is proportional to the ammonia concentration in the solution.

The ammonia electrode will measure ammonia gas or ammonium ion (converted to gas by strong base) in a variety of aqueous samples. Applications include water, wastewater, boiler
feedwaters, fertilizers, biological samples, fish tanks, and more.

What's Included:

(1) Ammonia combination electrode

(3) Ammonia membrane modules

(1) 50mL electrode filling solution

(1) Operations manual

Notable Specifications:

• Concentration Range: 0.06 to 17,000 mg/L NH3; 0.05 to 14,000 mg/L NH3-N
• Temp Range: 0 to 50 C (operating), -40 to 60 C (storage)
• pH Range: Greater than pH 11 (ISA raises pH above 11)
• Slope: -57 +/-3 mV/decade in linear concentration range
• Response Time: 95% response in three minute(s) or less in linear range
• Electrode Storage: Dry in air (membrane in sealed vial), or in ammonia storage solution
• Electrode Resistance: Less than 500 Megohm
• Electrode length: 14 cm (5.5 in.)
• Electrode diameter: 1.3 cm (0.5 in.)
• Cable length: 91 cm (36 in.)
• Electrode Connector: BNC (twist type)

Additional Product Information:

Ammonia Combination Electrode Manual