Online Ammonia and Ammonium Analyser
Apply parameter-specific wet chemistry to routine online ammonia and ammonium measurement.
Online Ammonia and Ammonium Analyser with 3S
Ammonia and ammonium measurement is relevant to drinking water, surface water, cooling water and municipal or industrial wastewater. The documented 3S method controls reagent addition and measures the resulting indophenol-blue response optically.
The required measurand, reporting basis, expected concentration and sample matrix must be agreed before configuration. PMA can review filtration or other sample preparation and how the result will support the treatment-monitoring programme. Read ammonia, ammonium and NH4-N specification guidance, then see the wastewater nutrient analyser guide or drinking-water applications. For chloraminated supplies, read ammonia and nitrite monitoring in drinking water.
Repeatable online ammonia and ammonium measurement in a compact analyser
The programmed sequence handles the sample and reagents automatically, allowing operators to review ammonia and ammonium results and analyser status through the integrated touchscreen.
01 / AMMONIUM METHOD
Parameter-specific ammonia and ammonium measurement
Ammonium reacts with salicylate and hypochlorite in the presence of ferricyanide to form an indophenol-blue response measured at 660 nm. The chemistry and cell length are selected for the required concentration range.
- Multiple chemistries and cell lengths
- 18–20 minute complete cycle
- Freely programmable analysis frequency
02 / AUTOMATIC ROUTINES
Calibration, validation and cleaning
Automatic routines can be scheduled at selectable intervals to support repeatable ammonia and ammonium monitoring between planned maintenance visits.
- Automatic calibration
- Automatic validation
- Automatic cleaning
Ammonia and ammonium analyser information
Core 3S-CL information for ammonia and ammonium method and installation review. The final chemistry, range and sample arrangement should be confirmed for the application.
Flexible installation
Wall or rack mounting is supported in the standard vertical arrangement.
Defined sample handling
A pressure-free sample reservoir presents flow to the analyser.
Process integration
Analog outputs and Modbus RTU RS485 support plant integration.
Operator records
The integrated datalogger supports USB result export.
Designed for changing ammonia and ammonium conditions
Programmed measurements help operators follow changing inlet, treatment-stage or final-water conditions between manual checks. Results, status and configured routines remain accessible through the colour touchscreen.
Touchscreen
Review ammonia and ammonium results, status information and analyser functions.
Automatic routines
Calibration, validation and cleaning run at selectable intervals.
Separate compartments
Electronic and wet-chemistry sections are physically separated.
Low reagent use
For low-range chemistry, the datasheet states 1 L per reagent for the 16 mm cell or 2 L for the 26 mm cell every 30 days at a 25-minute analysis frequency.
Ammonia and ammonium analyser technical specifications
Core 3S-CL information for specification and application review.
| Measured parameter | NH4+ (ppb, ppm, mg/L) |
| Measurement principle | Differential colorimetric absorbance; multiple methods available |
| Ammonium chemistry | Salicylate and hypochlorite reaction with ferricyanide; measured at 660 nm |
| Measuring range | Multiple low-, medium- and high-range chemistries; up to 1000 ppm with internal dilution |
| Reproducibility | Up to 1000 ppb: ±5 ppb or ±5%, whichever is greater |
| Cycle time | 18–20 minutes, including conditioning and rinsing |
| Sample conditions | Pressure-free vessel; 5–50°C; 80–500 mL/min |
| Sample streams | One or two integrated; three or four with an external sequencer |
| Power supply | 100–240 VAC, 50/60 Hz; optional 24 VDC; maximum 80 VA |
| Outputs | 2 × 4–20 mA and Modbus RTU RS485 |
| Installation | Wall mount as standard; bench-top or panel-mount options |
| Protection and environment | IP54; 5–45°C; 10–90% RH for indoor use |
| Dimensions and weight | 604 × 380 × 242 mm; approximately 20 kg |
| Automatic functions | Selectable validation, cleaning and calibration intervals |
Specifications should be confirmed against the latest 3S ammonium datasheet and the agreed chemistry before procurement.
Discuss Your Ammonia and Ammonium Measurement
Share the sample type, expected ammonia or ammonium concentration, solids loading, sampling point and required interval so PMA can assess the chemistry and conditioning. Arrange an application review or compare online and portable colorimetry.
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