Online Ammonia Nitrogen Sensor for Water Monitoring

Key Features

Ion selective electrode measurement principle for online ammonium detection
PVC membrane ammonia ion electrode for fast and economical ammonia nitrogen monitoring
Multiple measuring ranges including 0–10 mg/L, 0–100 mg/L, and 0–1000 mg/L
RS485 Modbus RTU output for PLC, DCS, controller, recorder, and IoT platform integration
Optional 4–20mA output for industrial analog signal monitoring systems
Automatic Pt1000 temperature compensation for more stable field measurement
Response time under 60 seconds for continuous water quality monitoring
IP68 waterproof protection for submerged installation
3/4 NPT thread for installation in tanks, pipelines, and immersion monitoring points
Low power consumption 0.2W at 12V suitable for remote and solar powered stations
ABS PVC and POM housing for compact and corrosion resistant water monitoring use
Two point calibration supports zero calibration and slope calibration
Standard 5 m cable with customizable cable length available
Long reference electrode life design using a stable internal reference liquid system

Product Description

1. Description

JW-NHN-206(K10) Online Ammonia Nitrogen Sensor is designed for continuous ammonium and ammonia nitrogen monitoring in wastewater treatment, surface water, aquaculture water, industrial discharge, tanks, pipelines, and smart water quality systems. Based on an ion selective electrode method with automatic temperature compensation, it provides fast and stable ammonia nitrogen data through RS485 Modbus RTU and optional 4–20mA output.

2. Product Overview

JW-NHN-206(K10) online ammonia nitrogen sensor is designed for continuous monitoring of ammonium concentration in water. It uses an ion selective electrode method based on a PVC membrane ammonia ion electrode. The sensor includes automatic temperature compensation to support fast, simple, accurate, and economical measurement in water quality monitoring applications.

With RS485 Modbus RTU communication, the sensor can be connected to PLCs, DCS systems, industrial computers, universal controllers, paperless recorders, touch screens, RTUs, gateways, and cloud based monitoring platforms. The 3/4 NPT thread supports submerged installation as well as installation in pipelines and tanks.

Item	Specification
Product Type	Online Ammonia Nitrogen Sensor
Measurement Principle	Ion selective electrode method
Electrode Type	PVC membrane ammonia ion electrode
Measuring Range	0–10.00 mg/L
Measuring Range	0–100.00 mg/L
Measuring Range	0–1000.0 mg/L
Resolution	0.01 mg/L or 0.1 mg/L depending on range
Temperature Resolution	0.1°C
Accuracy	±10% of reading or ±1 mg/L for 0–10 mg/L
Accuracy	±10% of reading or ±0.5°C related specification for 0–100 mg/L
Accuracy	±10% of reading ±0.5°C related specification for 0–1000 mg/L
Response Time	T90 less than 60 s
Detection Limit	0.09 mg/L for 0–10 and 0–100 mg/L ranges
Detection Limit	0.9 mg/L for 0–1000 mg/L range
Calibration	Two point calibration
Temperature Compensation	Automatic Pt1000 compensation
Output	RS485 Modbus RTU
Optional Output	4–20mA
Storage Temperature	-5°C to 65°C
Working Temperature	0°C to 40°C
Working Pressure	<0.1 MPa
Working pH Range	4–10 pH
Housing Material	ABS PVC POM
Installation	Submerged installation 3/4 NPT
Power Supply	12–24V DC
Power Consumption	0.2W at 12V
Protection Grade	IP68
Cable Length	Standard 5 m customizable
Connector	M16 5 pin waterproof male connector

3. Application Scenarios

Wastewater Treatment Monitoring: Suitable for online ammonia nitrogen monitoring in municipal wastewater plants, industrial wastewater treatment, aeration tanks, outlet monitoring, and discharge supervision.
Aquaculture Water Monitoring: Useful for shrimp ponds, fish ponds, recirculating aquaculture systems, and water quality control where ammonia nitrogen concentration affects aquatic animal health.For aquaculture farms, the sensor can be connected to an IoT gateway and cloud platform as part of a remote aquaculture monitoring solution.
Surface Water Monitoring: Can be used in rivers, lakes, reservoirs, canals, and environmental stations to monitor ammonia nitrogen pollution trends.
Industrial Process Water: Supports online monitoring in industrial water recycling, process water, cooling water, and wastewater discharge points.
Smart Water Quality Systems: RS485 Modbus RTU and optional 4–20mA output make the sensor suitable for integration with RTUs, gateways, telemetry terminals, PLCs, SCADA systems, and cloud dashboards.

4. Installation Notes

The sensor supports submerged installation, pipeline installation, and tank installation through a 3/4 NPT thread. It should not be installed upside down or horizontally. The installation angle should be at least 15° tilted to ensure stable electrode performance. All cable joints should be waterproofed, especially for long term submerged or outdoor applications.

5. Maintenance Guide

Before testing, remove the protective caps from the measuring electrode and reference electrode. Soak the electrode in clean water for about 2 hours for activation, then rinse it with deionized water before use. If the electrode is not used for more than two weeks, it should be stored dry with the sensing element protected by the protective cap.

Keep terminals dry and clean. If contamination is found, wipe with absolute alcohol and dry before use. Avoid long term immersion in distilled water or protein solutions, and prevent contact with organic silicone grease. If the PVC membrane becomes translucent or covered by deposits after long use, rinse it with distilled or deionized water. If calibration and measurement still cannot be performed after maintenance, the electrode should be replaced.

6. Water Quality System Integration

For rivers, reservoirs, wastewater treatment facilities, and environmental monitoring stations, the sensor can be connected to an IoT gateway and cloud platform as part of a remote water quality monitoring solution.

FAQ

Q

1. What is an online ammonia nitrogen sensor used for?

A

It is used for continuous ammonia nitrogen monitoring in wastewater, aquaculture, surface water, industrial discharge, tanks, and pipelines.
Q

2. What measurement principle does this sensor use?

A

It uses an ion selective electrode method with a PVC membrane ammonia ion electrode.
Q

3. Can JW-IoT integrate this ammonia nitrogen sensor into a smart water platform?

A

Yes. JW-IoT can integrate the sensor with RTUs, gateways, data loggers, cloud dashboards, alarms, and remote water quality monitoring systems.
Q

4. Is this ammonia sensor suitable for aquaculture monitoring?

A

Yes. It can be used for ammonia nitrogen monitoring in fish ponds, shrimp ponds, and recirculating aquaculture systems.
Q

5. How should the sensor be installed?

A

The sensor should not be installed upside down or horizontally. It should be installed at an angle of at least 15°.
Q

6. Why choose JW-IoT for ammonia nitrogen monitoring projects?

A

JW-IoT can provide sensors, telemetry devices, power systems, cloud platforms, alarms, and complete water quality monitoring integration.
Q

7. Does the sensor require calibration?

A

The sensor is calibrated before delivery, but two point calibration can be performed when measurement error exceeds the acceptable range.
Q

8. What output signals does the sensor support?

A

It supports RS485 Modbus RTU and optional 4–20mA output for industrial automation and remote monitoring systems.
Q

9. Can JW-IoT support customized cable length and system integration?

A

Yes. JW-IoT can support customized cable length, Modbus communication integration, and complete smart water monitoring solutions.