NIRSpec UAN analyzer

on-line analysis of Urea Ammonium Nitrate composition

- all data of the process -

NIRSpec UAN Process analyzer

NIRSpec image

The state of the art solution for on-line analysis of the composition of Urea Ammonium Nitrate.

NIRSpec UAN analyzer can measure not only the concentrations of the main UAN components: Urea, Ammonium Nitrate and Water, but also the concentration of the unwanted by-product Biuret, which is becoming an increasingly important quality parameter of UAN.

Accurate continuous/real-time measurements enable a better control of the quality of the UAN in the production process.

The analytical technology is based on the Near Infra-Red spectroscopy and the state of the art proprietary multivariate calibration.

NIRspec installation on urea plant, scheme

All UAN process data from NIRSpec


NIRspec UAN analyzer provides real-time continuous data of:

- Urea concentration

- Ammonium Nitrate concentration

- Biuret concentration

- H2O concentration

- Urea/Ammonium Nitrate ratio

- N_NH4 concentration

- N_NO3 concentration

- N_NH2 concentration

- N total

- Sample temperature

- Temperature of the PCB of the spectrometer

- Turbidity


On-line measurement of all UAN components.

Accuracy up to 0.1% wt. (for all components).

State of the art (proprietary) multivariate calibration with compensation for product temperature variation and for turbidity.

Robust, durable industrial design (no moving parts).

Large transillumination area, hence less sensitivity to optical window fouling, better repeatability.

Automatic washing/cleaning of optical windows.

Operating pressure up to 10 bar.

Operating temperature up to 120 °C.

RS485 MODBUS interface.

IP67 rating.


Continuous on-line quantitative analysis of UAN for better process (product quality) control.

Measurement of 4 UAN components: Urea, Ammonium Nitrate, Water and Biuret.

Eliminates time-loss and cost for sampling and laboratory measurements.

High accuracy, repeatability and stability.

Low operating and maintenance costs.

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