Nitrite Analyzer

Model CA-600

Description

Features

Specifications

Application

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Description

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.

Features

Specifications

Application

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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)