Nitrite Analyzer
Model CA-600
The Nitrite Analyzer is an on-line sequential sampling analyzer, a sequence of sampling, analysis and result processing is performed and repeated using colorimetric methods. The measurement is a colorimetric analysis using an LED light source and a heated colorimetric cell designed for measuring trace amounts of analyse in water.
The colorimetric analyzer is assembled with two separated sections. The bottom section is the LIQUIDS section. It includes all of the components involved in the flow, mixing and reaction stages of the sample and reagents. Numerous analysis configurations can be programmed, depending on accessories and of the number of micro pumps mounted in the Liquid Section. The top section is the ELECTONICS enclosure. It includes the main power supply, the controller PCB assembly and the touch screen interface.
The measuring Principle
Nitrite forms with sulphanilamide and N-(1-naphthyl)-ethylene diammonium dichloride in acidic medium a purple colored dye. The absorbance intensity is proportional to the nitrite concentration in the sample and is determined at 525 nm.
• Simple & Reliable
• Easy installation
• User friendly
• Menu structure touchscreen
• Easy interface Configuration
• Two separate compartments
• Low Reagent Alarms
• Cost Effective & Low Maintenance
• Adjustable Cycle time to minimize reagent usage
Measuring principle | Differential photometric absorbance Diazotization |
Measuring range | 5 to 500 ppb N-NO2 (1.6 ppm NO2) for the 26 mm cell – 0.02 to 1 ppm N-NO2 / (3.2 ppm NO2) for the 16 mm cell Up to 40 ppm N-NO2 / 125 ppm NO2 with internal dilution |
Reproducibility | ± 5 ppb or ± 5%, whichever is greater up to 150 ppb (26 mm cell) ≥ 150 ppb to 600 ppb: ± 10 ppb ≥ 600 μg/l: ± 20 ppb or ± 5%, whichever is greater (16 mm cell) |
Cycle time | 6-8 minutes, including conditioning before analysis cycle and rinsing after measuring |
Accuracy | Depends upon specific range measurement |
Sample Temperature | 41 – 122 °F (5 to 50 °C) |
Sample Pressure | Pressure-free from overflow vessel |
Sample Flow | 80 to 500 mL/min |
Sample Connections | 6 mm (¼-in.) |
Drain Connections | 12 mm (½-in.) |
Monthly reagent consumption (15 minutes analysis frequency) | 1 L for the 16 mm cell 2 L for the 26 mm cell |
Number of streams | 1, 2 with integrated switching valve Other with external sequencer |
Power supply | 100 – 240 VAC 50/60 Hz |
Analog Output | 4-20 mA outputs |
Digital Output | Modbus RTU RS485 |
Alarms | 4 SPDT programmable potential free relays |
Operating Temperature | 41 – 113 °F (5 – 45 °C) |
Humidity | 10 to 90% non-condensing |
Installation | Panel mount, Wall mount, Rack mount |
Ingress Protection | IP 65 |
Dimensions (H x W x D) | 23.6 x 15.0 x 8.2 in / 606 x 380 x 209 mm |
Weight | Approx. 44 lbs (20 Kg) |
• Drinking water
• Process optimisation of wastewater treatment plants
• Industrial and municipal wastewater
• Mineral water monitoring
• Surface water