KZNO-210 Online Optical Nitrate Nitrogen (NO3-N) Sensor
This online optical nitrate nitrogen sensor comes with anti-chloride interference capability.
It supports LCD display and multi-signal output.
Suitable for water plants and all kinds of wastewater treatment facilities.
KZNO-210 Online Optical Nitrate Nitrogen (NO3-N) Sensor
1. Core Advantages:
Built with full intelligent design and stable measuring performance.
It can adapt well to complex working environments.
Multiple data can be shown on screen at the same time.
Including measured value, output current, time and relay status.
It provides dual 4–20 mA analog outputs.
It also supports relay high and low alarm control output.
Adopts nitrate PVC ion-selective electrode structure.
It converts potential difference into NO3⁻ concentration data.
It can effectively shield interference from chloride ions.
Works steadily in near-neutral pH working environments.
2. Tehnical Specifications:
Measuring Range | 0~200mg/l, 0~2000mg/l or expandable based on requirements |
Resolution | 0.01mg/l |
Error | ±3%FS |
Display Method | LCD |
3. Applications:
Commonly used in water plants and power plants.
Also applied in wastewater treatment stations, pharmaceutical factories and hospitals.
Used for real-time online nitrate nitrogen monitoring in different water samples.

4. Installatiom
Mount the sensor at well-mixed and representative flow positions.
Keep away from stagnant water areas and air bubble gathering spots.
Avoid direct sunlight during installation.
Supports immersion, pipeline and wall-mounted installation methods.
Connect the sensor with transmitter, PLC and control cabinets.
Link to remote monitoring platform for real-time data recording.
It also supports automatic process control linkage.
Use shielded cable for RS485 and 4-20mA signal transmission.
Avoid external signal interference.
Keep 12-24V DC power supply stable all the time.
5. Maintenance Schedule
Complete two-point calibration with standard nitrate solution every 3-6 months.
Calibration is also required after probe cleaning work.
Wipe the optical window every month to remove surface fouling.
Optional automatic cleaning function supports long-term unattended operation.
The optical probe can keep 3-5 years service life under normal working conditions.

6. KZ Sensor Products Packing & Shipping:
All nitrate related sensors are wrapped with eco-friendly waterproof plastic film.
Product range includes Online nitrate sensor, Nitrate nitrogen sensor for water, Industrial nitrate probe, Low maintenance nitrate sensor, Water quality nitrate sensor.
Add anti-collision buffer layer and reinforced outer packaging.
Place finished goods on eco-friendly fumigation-free pallets for safe delivery.

7. Our Factory Simple Introduction:
Established in 2009
Factory area: 15,000 m
R&D personnel: 50+
Industry experience: 20+ years
Production lines: 4+
Annual output: 100 units per month
Export coverage: Asia, Europe, Middle East, North America & South America
We have 20 years of manufacturing experience.
Factory area expands to 20,000 square meters.
Equipped with full set of sheet metal bending and processing equipment.

8. KZ Quality Control:
We supply full series nitrate sensor products for water quality monitoring.
Complete certification qualifications are fully obtained.
All certificates prove our standard in product quality, safety and technical innovation.

9. Common Troubleshooting
Recalibrate the sensor when measured data is not accurate.
Clean optical window and check organic matter interference.
Check power supply and wiring if there is no signal output.
Confirm communication protocol setting is correct.
Do full calibration when obvious data drift appears.
Inspect optical window for scratches and surface dirt


