EZ4005 Hach Ammonium Analyzer

The EZ4005 (No. EZ4005) is a specialized volumetric analyzer that brings laboratory-grade precision to autonomous industrial environments. It utilizes the Berthelot reaction, where ammonium reacts with alkaline hypochlorite and phenol (or a salicylate substitute) in the presence of a catalyst to form a stable indophenol blue complex. The intensity of the blue color, which is proportional to the ammonium concentration, is measured with high accuracy by an integrated LED colorimeter. The system features a smart controller that manages automatic cleaning, priming, and validation cycles to prevent sensor fouling and ensure data integrity. Its modular design supports multi-stream analysis, allowing a single unit to monitor up to 8 separate sample lines. Housed in a robust IP44-rated cabinet, the analyzer features an industrial panel PC with a touchscreen interface for intuitive operation and data visualization.

Advantages

• High Precision Colorimetry: Automated indophenol blue method provides superior sensitivity and accuracy compared to ion-selective electrodes (ISE), especially at low concentrations.
• Automated Maintenance: Integrated self-cleaning and automatic validation routines minimize the need for manual intervention and ensure consistent performance.
• Scalable Multi-Stream Analysis: Reduces the capital cost per sampling point by supporting sequential monitoring of up to 8 separate water streams.
• Robust Industrial Design: The physical separation between the wet-chemical and electronic sections ensures safety and longevity in demanding plant environments.
• User-Friendly Interface: The industrial panel PC provides real-time trend analysis, easy configuration, and comprehensive diagnostics at your fingertips.
• Flexible Range Management: The measuring range can be optimized for specific applications through internal dispenser-controlled dilution, ensuring accurate results from ppb to ppm levels.

Instructions for use

The EZ4005 is designed for fully automated online operation once integrated into the sample loop. Preparation: Ensure a constant supply of demineralized water for automated rinsing. Connect the sample inlet line (ensuring a flow rate of 100 - 300 mL/min) and install the required reagents: Buffer solution, Hypochlorite reagent, and the Salicylate/Catalyst reagent. Note: Configure the desired measurement frequency and alarm setpoints via the touchscreen interface. The analyzer will automatically draw a sample, add the necessary reagents to develop the color complex, and perform the measurement. Data is updated on the screen and transmitted to the plant SCADA via 4-20 mA outputs or optional Modbus TCP/IP. Routine maintenance typically involves reagent replenishment and a 6-month inspection of the peristaltic pump tubing.

Technical specifications