• Drinking water
  • Process optimisation of wastewater treatment plants
  • Industrial and municipal wastewater
  • Mineral water monitoring
  • Surface water


Spectrophotometric analyzer for the determination of nitrate ions.
The measurement is based on the UV absorption of the nitrate ion at 220 nm. The instrument allows ranges of 30 and 60 mg/L as NO3 (x2 to x40 with dilution). The result can be expressed as NO3 or N-NO3.
Nitrates are dangerous pollutants for aquatic life and poses risks to human health when present in drinking water. The nitrates concentration in surface waters derive mainly from biological pollution due to urban agglomerations, agriculture nitrogenous fertilizers, discharges from chemical industries and combustion processes. The instrument is ideal for potable water or suface water analysis and with the addition of a dilution module is also capable of the determination of nitrates in complex matrices such as urban and industrial wastewaters.


The method is based on the absorbance that the nitrate ion in water sample presents in the UV region at 220 nm . Considering that also organic substances absorb in that spectrum region, a reference absorption measurement at 270 nm is required, in order to reduce the organic interference. The compensated absorbance is proportional to the nitrate ions concentration in the sample.


Wavelength 220 nm
Min. analysis time 1 minutes

Technical Specifications

Model UV
Analysis Mode Batch, near continuous operation.
Sample Pressure-free vessel
Temperature: 5 to 50 °C (41 - 122 °F)
Flow Rate: 80 to 500 mL/min
Connection: 6 mm (¼-in.)
Drain Pressure-free drain
Connection: 12 mm (½-in.)
Streams 1, 2 with integrated switching valve
3, 4 with external sequencer
Frame Cold-rolled steel painted with epoxy powder
Dimensions (H x W x D) 606 x 380 x 209 mm (23.6 x 14.8 x 8.2 in)
Weight 20 kg (44 lbs)
Power Supply Input Voltage:100 - 240 VAC 50/60 Hz standard or 24 VDC (option)
Power consumption: max. 80 W
Output signals 2 x 4-20 mA analog outputs
Modbus RTU via RS485
Alarms 4 SPDT programmable voltage-free relays
Digital Input Remote start / stop
Temperature 5 - 45 °C (41 - 113 °F)
Relative Humidity 10 to 90 % (indoor use, outdoor installation only possible with protective cabinet or shelter not included)
International Protection IP54


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