NBL-NHN-206 Online Water Quality Ammonia Nitrogen Sensor

NBL-NHN-206 integrated online ammonia nitrogen sensor is fabricated using a PVC membrane-based ammonium ion selective electrode for testing ammonium ion content in water with temperature compensation to ensure fast, simple, accurate and economical testing. The technical parameters, maintenance and communication protocols of the ammonia nitrogen sensor are described in detail in this user manual. Signal output: RS-485 bus, Modbus/RTU protocol, convenient to connect to PLC, DCS, industrial control computer, general controller, paperless recording instrument or touch screen and other third-party equipment. The patented ammonium ion probe, the internal reference solution oozes extremely slowly from the microporous salt bridge at a pressure of at least 100 KPa (1 Bar). Such a reference system is very stable and has a longer electrode life than conventional industrial electrodes. Easy to install: 3/4 NPT thread (pipe thread) for easy submersible installation or installation in pipes and tanks. IP68 protection level.

NBL-NHN-206 Online Water Quality Ammonia Nitrogen Sensor Technical Specifications

1. Application environment

NHN-206A integrated online ammonia nitrogen sensor is fabricated using a PVC membrane-based ammonium ion selective electrode for testing ammonium ion content in water with temperature compensation to ensure fast, simple, accurate and economical testing. The technical parameters, maintenance and communication protocols of the ammonia nitrogen sensor are described in detail in this user manual.

Signal output: RS-485 bus, Modbus/RTU protocol, convenient to connect to PLC, DCS, industrial control computer, general controller, paperless recording instrument or touch screen and other third-party equipment.

The patented ammonium ion probe, the internal reference solution oozes extremely slowly from the microporous salt bridge at a pressure of at least 100 KPa (1 Bar). Such a reference system is very stable and has a longer electrode life than conventional industrial electrodes.

Easy to install: 3/4 NPT thread (pipe thread) for easy submersible installation or installation in pipes and tanks.

IP68 protection level.

2. Electrical connection

a) Red line - power cord (12 ~ 24V)

b) Black line - ground (GND)

c) Blue line - 485A

d) White line - 485B

After wiring is completed, it should be carefully checked to avoid incorrect connections before powering up.

Cable specification: Considering that the cable is immersed in water (including sea water) for a long time or exposed to the air, all the wiring points are required to do waterproof treatment, the user cable should has certain corrosion resistance.

3. Maintenance

1. Use and maintenance

Rinse the electrode in distilled water (or deionized water), blot dry, and do not wipe dry. Place the electrode on the electrode holder. Before use, the tip of the electrode was immersed in distilled water (or deionized water) for 10 minutes and then immersed in the diluted ammonium ion solution for 2 hours.

Keep the electrode dry before use. The sensing element of the electrode should be placed in the protective bottle. The electrode should be immersed in the activation solution for 24 hours before testing. If stored overnight or longer, clean the electrode tip with deionized water, wipe dry, and place in the original packaging.

Check if the terminal is dry. If it is stained, wipe it with absolute alcohol and dry it. Avoid long-term immersion in distilled water or protein solution and prevent contact with silicone grease. With longer electrodes, its PVC film may become translucent or with deposits, which can be rinsed with distilled water (or deionized water). The electrode is used for a long time. When a measurement error occurs, it must be calibrated with the meter.

When the calibration and measurement cannot be performed while maintaining and maintaining the electrode in the above manner, the electrode has failed. Please replace the electrode.

The main interference ions are shown in the table below:

Interference ion concentration that produces 10% error at different ammonium ion concentrations

4. Sensor calibration

Note: The sensor has been calibrated before leaving the factory. If it is not beyond the measurement error, it should not be arbitrarily calibrated.

a) Zero calibration

Place the sensor in a vial containing the zero standard solution and wait for 5 minutes. After the value is stable, see if the displayed value is within the error range. If not, perform a zero calibration. Refer to the appendix for calibration instructions.

b) Slope calibration

Place the sensor in a vial containing the standard solution of the slope and wait for 5 minutes. After the value is stable, see if the displayed value is within the error range. If not, the slope calibration is required. Refer to the appendix for calibration instructions.

NBL-NHN-206 Online Water Quality Ammonia Nitrogen Sensor Data Sheet

NBL-NHN-206 Online Water Quality Ammonia Nitrogen Sensor.pdf