Uv Meter Nitrate

PHOTOMETRIC ANALYSER OF NITRATE

The measuring principle is based on the intense UV absorption of the NO chromophore at 210…220 nm in accordance with the Lambert-Beer law:

[ C ] : sample concentration
k : extinction coefficient
I in : sample input light intensity
I out : sample output light intensity

FEATURES

  • Automatic linearisation stored in the analyser allows the user to compensate for the non-linearity of the Lambert-Beer law for high concentrations.
  • The measurement is the weighted sum of the concentrations of NO2 and NO3, in most applications, the concentration of NO2 is negligible compared to that of NO3.
  • Organic substances, suspended solids or dirt in the measuring cell are automatically compensated through a differential measurement with a second detector at a different wavelength.

APPLICATIONS

  • Surface water monitoring
  • Potabilisers
  • Water-treatment plants

TECHNICAL SPECIFICATION

Feature DESCRIPTION
Measured Parameters NO3, N-NO3, N-NO2
Measuring Principle Dual wavelength technique, 220 nm measuring and 270 nm as reference, with matrix compensation
Measuring Range 16 mm cell: 0-30 mg/l NO3 (0-6.75 mg/l as N-NO3)
11 mm cell: 0-60 mg/l NO3 (0-13.50 mg/l as N-NO3)
Up to 2,000 mg/l with internal dilution (0-450 mg/l as N-NO3)
Reproducibility ± 2.5% (30 ppm) ± % (60 ppm) on the absorbency value for samples having turbidity below 100 NTU
Cycle Time Less than 1 minute, including conditioning before analysis cycle and rinsing after measuring
Sample Pressure: Atmospheric
Temperature: 5...50°C (41...122°F)
Flow rate: 80 to 500 mL/min
Connection: 6 mm (¼-in.)
Drain Pressure-free, atmospheric drain. Connection: 12 mm (½-in.)
No. of Streams 1, 2 with integrated switching valve
Dimensions (HxWxD) 604x380x242 mm
Weight Approx. 20 kg (44 lbs)
Power Supply Voltage: 100-240 VAC 50/60 Hz standard or 24 VDC (option)
Power consumption: max. 80 VA
Outputs 2x4-20 mA outputs for measured data, Modbus RTU RS485
Alarms 2 SPDT programmable potential free relays
Digital Input Remote start/stop, start extra cycle, skip idle time, emergency stop
Operating Temperature 5...45°C (41...113°F)
Installation Wall mount (standard), bench top supporter panel mount (optional)
Protection Grade IP54