Range and optical path
Provide minimum, normal and maximum NO₃-N and confirm the 1 mm or 2 mm optical path.
NO₃-N · 210 nm UV spectroscopy
Select online nitrate nitrogen measurement by range, optical path and water matrix
PUVNO3-900 uses 210 nm UV spectral absorption with 1 mm and 2 mm optical paths covering 0.1–100.0 mg/L and 0.1–50.0 mg/L nitrate-nitrogen ranges.
0.1–100.0 mg/L1 mm optical path
0.1–50.0 mg/L2 mm optical path
±5%measurement accuracy
0.01 mg/Lresolution
01 · Start with the actual sample
Evaluate range, optical path and water interference together
PUVNO3-900 uses direct-immersion 210 nm UV spectral absorption. Selection still requires the nitrate range, turbidity and solids, optical path, cleaning, pressure and mounting point.
Water matrix and interference
State drinking water, surface water, industrial process water or wastewater plus turbidity, solids, bubbles and fouling.
Mounting and cleaning
Confirm pressure, immersion position, mounting, automatic cleaning and maintenance access.
Interfaces and delivery
Confirm cable, 4–20 mA, relays, RS485, power, quantity and project destination.
02 · Product model
PUVNO3-900 online UV spectral nitrate analyzer
Configured with a black FUNEL single-parameter transmitter and Ø69 mm spectral probe, with 4–20 mA, three relays and Modbus RS485.
Reagent-free UV nitrate analyzerPUVNO3-900Online UV Spectral Nitrate Analyzer
A direct-immersion, reagent-free spectral probe for continuous nitrate nitrogen measurement in drinking water, source water, industrial process water and wastewater treatment.
0.1–100.0 mg/L±5%0.01 mg/L
03 · Operating applications
Typical nitrate-monitoring applications
For continuous nitrate-nitrogen monitoring in drinking water, surface water, industrial process water and wastewater. Confirm turbidity, solids, optical path and cleaning conditions during selection.
Drinking water
Continuously track nitrate nitrogen in drinking-water monitoring programs.
Surface and source water
Monitor nitrate trends in rivers, lakes and source-water projects.
Industrial process water
Add reagent-free nitrate monitoring to industrial water processes.
Wastewater and aeration tanks
Observe nitrate nitrogen continuously to support nitrification-process control.
04 · Common questions
Confirm this information before an inquiry
What is the difference between the 1 mm and 2 mm optical paths?+
The source gives 0.1–100.0 mg/L for the 1 mm path and 0.1–50.0 mg/L for the 2 mm path. Final selection depends on the actual sample.
Are chemical reagents required?+
No. The supplied sheet states direct-immersion continuous measurement by 210 nm UV spectral absorption.
Why is an actual sample description required?+
Turbidity, suspended solids, bubbles and fouling can affect optical measurement and maintenance planning.
Can the website image replace a dimensional drawing?+
No. It is for consistent public presentation. The Ø69 × 381/382 mm sensor dimensions, transmitter dimensions and mounting remain controlled by the datasheet and order confirmation.
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.