Online NH3-N Analyzer

Vasthi Instruments are global leaders in manufacturing of Online NH3-N Analyzer and have been supplying instruments to customers worldwide, Our multidisciplinary team of scientists, physicians, engineers, and regulatory consultants with decades of global experience brings you the quintessential mechanism that provides complete safety accuracy and durability.

Vasthi Instruments was formed with visionary thinking and innovative ideas resulting in innovative products and solutions. We enhance our product quality by the continuous process of research and development. We have WIDE range of models to suite various site conditions and processes.

Online NH3-N Analyzer




Based on our Permanence measurement technology platform, combined with constant temperature fiber and digestion colorimetric integration technology, V.WNH-4000 NHN Water Quality Online Auto Analyzer can achieve high precision, low detection limit, high 3 3 stability and low maintenance of NH3N automatic online monitoring. The product fully meets the application of pollution sources, industrial production process, municipal wastewater, and etc.


MODEL NO: V.WNH3 -4000

Features :

•High reliability, strong anti-interference capability
•Permeance measurement technology will not be interfered by chromaticity, suspended solids and bubbles.
•High detection precision, lower detection Limit (0.01mg/L), small drift for long-term operation.
•Strong ability to resist chromaticity, calcium and magnesium ions.
•Good operability, small maintenance workload and low maintenance cost
•Self-diagnostic funcon.
•Single-channel valve island of high integration, able to maintain, disassemble and clean individually.
•Able to extend to all-day networking for real-time inspection of instrument running state.
•High intelligence level
•Equipped with alarm function, quality control function and reverse control function.

Application :

It can be widely used in environmental pollution source monitoring, industrial process water monitoring municipal sewage processing, surface water monitoring, and etc.


  • Measurement method: Salicylic acid Spectrophotometry
  • Range  01-2/10/1000mg/L (extendable)
  • Zero drift: <0.02mg/l
  • Span drift <2%
  • Indication error: 20% FS ±10% :50%FS ±5%: 80%FS ±3%
  • Repeatability: <3%
  • Reagent: Standard reagent can do 400 times of measure
  • Maintenance:<2hour/month
  • Working temperature: 5~N-45°C
  • Power consumption: 200w(220VAC±10%, 50Hz), not contain water pump
  • Memory effect: 20% FS ±0.3mg/L 80% FS ±0.2mg/L
  • Lower detection Limit: 01mg/L
  • Communication interface: RS485/RS232/USB interface (optional