● Monitoring and early warning of drinking water source
● River water quality monitoring and early warning
● Lake reservoir water quality monitoring and early warning

 A method for measurement of ammonia nitrogenin the laboratory with Nessler's colorimetry, indophenol bluespectrophotometric method, these methods are slow reaction and waste twopollution and other shortcomings, not really for water environment real-timemonitoring and early warning. Determination of ammonia nitrogen by ionselective electrode method with DNH electrode ammonia nitrogen analyzer.Ammonia ion selective electrode was used to detect the ammonium ion in water environment.The pH electrode was used as the reference electrode to obtain betterstability. DNH ammonia sensor consists of a sensor integrated by ammonium ionselective electrode, pH electrode and the temperature measuring electrode, canbe modified, the ammonia compensation values of several parameters and multiparameter measurement. The ammonia nitrogen analyzer can be flexibly adjustedonline to improve the accuracy of the measurement.

● The sensor can dynamically compensate the temperature and pH in the sample;
● No sample pretreatment, fast reaction analysis;
● Do not need any reagent, no two pollutions;
● Optional self-cleaning device to reduce maintenance;
● Save reagents and maintenance costs, low operating costs.

?● Measurement performance
● Measurement parameters:NH4-N, pH, temperature
● Measurement range: NH4-N:0.05～1000mg/L pH:0~14 Temp: 0~50℃
● Accuracy: NH4-N≤±10% pH:±0.1 Temp:±0.1℃
● Repeatability: NH4-N: less than±2% pH:±0.1 Temp:±0.1℃ 24h
● Drift: NH4-N:less than ±5% pH:±0.1 Temp:±0.1℃
● Reaction time:1 minutes to reach the measured value of 90%
● Reliability: MTBF ≥ 1440h
● Entertainment temperature: -5℃ ~50℃
● Water sample temperature: 0~40℃(Not freeze)
Output
● Digit interface: RS485/MODBUS protocol
Power supply
● DC power supply: DC 9~30?