Environmental monitoring systems

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MODEL 9820 online monitoring system for ammonia nitrogen in wastewater

The MODEL 9820 online monitoring system for ammonia nitrogen can be used for sewage, wastewater, and surface water.


Pharmaceutical industry
Petrochemical, chemical plant
Paper industry 
Textile industry
Iron and steel metallurgy plant
Electroplating industry 
Drinking water treatment industry
Wastewater treatment industry 
Food industry 
Environmental protection related industries



Large measurement range: scalable to 1500mg/l

Environmentally friendly equipment, low toxic reagents, reduces secondary pollution

        Automatic cleaning function and automatic calibration function

The instrument has whole point measurement and time interval measurement

Comes with RS232 communication port and (4 ~ 20) mA output

Automatic operation after power failure recovery

Up to 30,000 historical measurement data can be saved

Convenient data export function, U disk direct export of historical data reports

Malfunction and missing reagent (sample) auto-prompt function

Support remote control and communication

Ultra-low reagent consumption, reagent consumption 0.5ml/time

Innovative multi-valve terminal injection system for accurate and efficient  injection 


       Technical parameters

Test method: Salicylic acid spectrophotometry
Test range: 0 ~ 0.5 ~ 5 ~ 25 ~ 300mg/l (expandable to 1500mg/l)
Detection limit: 0.02mg/l
Resolution: 0.01mg/l
Accuracy: 5% FS

Repeatability: ≤ 3%
Zero drift: ± 5%
Range drift: ± 5%
Minimum measurement period: 18 min
Self-monitoring: self-diagnosis of instrument status
Analog output: 0/(4 ~ 20) mA analog output
Relay control: 24V 1A relay high and low point control (can define the instrument status)
Service interface: RS232 or RS485
Data communication: Standard MODBUS RS485 or RS232 for bidirectional communication and remote control
Display: color touch screen
Operation menu: Chinese
Data storage: 30,000 groups
Sample PH: 5 ~ 9
Operating temperature: +5 ~ +40
M T B F: ≥ 720h/time
Power: (220 ± 22) V AC, (50 ± 1) Hz
Power: about 100 VA
Size: 1600mm x 600mm x 600mm
Weight: about 75kg