The KSA-NH07 online ammonia nitrogen sensor is an industrial grade device for monitoring ammonia nitrogen concentration in water bodies. It uses ion selective electrode method and is equipped with Pt1000 automatic temperature compensation. It is suitable for 4-10pH wide water sample environment, PVC+POM corrosion-resistant shell with IP68 high protection level, easy two-point calibration operation, low power consumption design, and is suitable for long-term online monitoring. It is widely used in ammonia nitrogen concentration detection scenarios such as municipal sewage, industrial wastewater, and water environment monitoring.
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Parameters
| Item | Specification |
|---|---|
| Measuring Range | 0-100mg/L or 0-1000mg/L (optional) |
| Resolution | 0.1mg/L |
| Accuracy | ±5%F.S. |
| Applicable pH Range | 4-10pH |
| Operating Temperature | 0-50℃ |
| Operating Pressure | ＜0.2MPa |
| Measuring Principle | Ion Selective Electrode Method |
| Temperature Compensation | Automatic Temperature Compensation (Pt1000) |
| Response Time (T90) | ＜60s |
| Calibration Method | Two-point Calibration |
| Power Supply | 12-24VDC |
| Signal Output | RS-485(Modbus/RTU) |
| Power Consumption | ＜0.5W |
| Mounting Method | Immersion Installation, 3/4NPT Pipe Thread |
| Cable Length | 5m (Other lengths customizable) |
| Housing Material | PVC + POM |
| Protection Grade | IP68 |
| Storage Temperature | -5~65℃ |
| Minimum Detection Limit | 0.9mg/L (for 0-1000mg/L range) |
| Electrical Connection | 5-core twisted shielded wire |
Why choose KSA-NH07 sensor?
- Dual range optional (0-100mg/L/0-1000mg/L), 0.1mg/L resolution, ± 5% F.S. high precision, meeting the monitoring needs of water bodies with different concentrations
- Patent ammonia ion electrode based on PVC film, with built-in high-voltage reference liquid system, strong electrode stability and longer service life
- Pt1000 automatic temperature compensation, working in a wide temperature range of 0-50 ℃, effectively offsets the interference of temperature on measurement results, and provides more accurate data
- 4-10pH wide adaptability range, working pressure<0.2MPa, PVC+POM corrosion-resistant shell, suitable for complex water quality conditions
Featured Applications
- Municipal sewage treatment: online monitoring of ammonia nitrogen concentration in sewage plant intake, biochemical tank, and outflow to regulate process and ensure discharge standards;
- Ammonia nitrogen detection of wastewater from chemical, printing and dyeing, aquaculture, and food processing sectors, tailored to high-concentration organic wastewater monitoring;
- Water environment monitoring: Long-term online ammonia nitrogen monitoring in rivers, lakes, reservoirs, and groundwater to assess eutrophication;
- Aquaculture: monitoring ammonia nitrogen content in aquaculture and seedling ponds, controlling water quality, and preventing fish and shrimp deaths from high ammonia nitrogen;
Installation and wiring
Installation requirements
- Adopting 3/4NPT pipe thread immersion installation, supporting various installation methods such as sinking, pipeline, and side wall. Side wall/pipeline installation requires a dedicated mounting seat;
- When installing sensors, it is prohibited to install them upside down/horizontally. It is necessary to ensure a tilt angle of at least 15 ° to ensure the normal flow of internal reference liquid;
- The installation position should avoid strong water flow impact and dead corners of the tank body, ensuring sufficient contact between the measuring end and the water sample to avoid sediment adhesion affecting the detection.
Electrical wiring
- Standard 5-core twisted pair shielded wire with strong anti-interference ability and clear line sequence definition: red – power line (12-24VDC), black – ground line (GND), blue -485A, green -485B, yellow – standby (suspended);
- Before powering on, it is necessary to strictly check the wiring sequence to avoid damaging the equipment due to wiring errors;
- Waterproof and anti-corrosion treatment should be carried out at the wiring points, and the cables should be adapted to industrial scenarios such as underwater and humid outdoor environments to extend their service life.
Maintenance and Calibration
Routine maintenance
- Soak the electrode in clean water for 2 hours before first use for activation, rinse with deionized water, and then measure;
- Regularly rinse the measuring end with distilled water to avoid scratching the PVC film with hard objects and promptly clean the sediment;
- Long term disuse (over 2 weeks) requires dry storage and protective caps should be placed on the sensing elements;
- Avoid long-term contact of electrodes with distilled water, protein solutions, and organic silicon oils and fats;
- When the wiring terminal is contaminated, wipe and dry it with anhydrous alcohol to ensure waterproofing and anti-corrosion.
Calibration operation
- The factory has been calibrated, and it is not recommended to calibrate randomly unless the measurement error exceeds the standard. The two-point calibration method should be used;
- Zero point calibration: Immerse in a low concentration standard solution, let it stand for 5 minutes until the value stabilizes. If it exceeds the tolerance, calibrate it using Modbus commands;
- Slope calibration: After washing the electrode, immerse it in a high concentration standard solution and let it stand for 5 minutes until the value stabilizes. If it exceeds the tolerance, calibrate it using Modbus commands;
- Calibrate once every 1-3 months under normal operating conditions, and shorten the calibration cycle for high pollution and high impurity water samples.
Technical Support
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The KSA-NH07 online ammonia nitrogen sensor detects ammonia nitrogen in municipal, industrial, and aquatic environments with excellent precision, stability, and ease of use using unique ion selective electrode technology. Quality control, anti-corrosion, and low consumption make the gadget suitable for long-term online monitoring. It monitors water ammonia nitrogen concentration professionally and reliably. We have enough to change wire lengths and more. Request selection and bulk procurement to protect water quality!
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