Applications
- Drinking water
- Process optimisation of wastewater treatment plants
- Industrial and municipal wastewater
- Mineral water monitoring
- Surface water

Description
The instrument is ideal for potable water or suface water analysis and with the addition of a dilution module is also capable of the determination of nitrates in complex matrices such as urban and industrial wastewaters.
The determination ranges of the nitrate analyzer vary from trace μg/L to 25.0 mg/L N-NO3 (80 mg/L NO3) using the (optional) internal dilution module. The result can be expressed as NO3 or N-NO3.
Method
Both hydrazine and copper catalyst reagents are used to reduce Nitrate to Nitrite in a basic medium inside a heated reaction cell. A sulfanilamide and N-(1-naphthyl)-ethylene diammonium dichloride reagent is added to react with the Nitrite to form a purple colored compound. The absorbance intensity is proportional to the Nitrite concentration in the sample and is measured at 525 nm
Features
Measured parameter | NO3- | ||||||
Range
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Reproducibility*
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Limit of detection | 2 ppb |
Wavelength | 525 nm | ||||
Demineralized water | Not required | ||||
Termoregulation | 37 °C | ||||
Number of reagents | 3 | ||||
Min. analysis time | 11 minutes | ||||
Default analysis time | 20 minutes | ||||
Reagent consumption**
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Reagents and standards
Technical Specifications
Model | 3S-CL |
Sampling Mode | Batch, with freely settable frequency. |
Sample | Pressure: Atmospheric Temperature: 5 ‐ 45°C (41 ‐ 113°F) Flow Rate: 80 to 500 mL/min Connection: 6 mm (¼-in.) |
Drain |
Pressure-free drain Connection: 12 mm (½-in.) |
Input Streams | 2 |
Material | Epoxy-coated stainless steel AISI 304 |
Dimensions (H x W x D) | 604 x 380 x 210 mm (23.6 x 14.8 x 8.2 in) |
Weight | 20 kg (44 lbs) |
Power Supply |
Input Voltage: 115 VAC,230 VAC,24 VDC Power consumption: max. 80 W |
Output signals |
2 x 4-20 mA analog outputs Modbus via RS485,Ethernet |
Alarms | 2 SPDT programmable voltage-free relays |
Digital Input | None, Online, Start Extra, Skip Idle, Emergency Stop |
Ambient Temperature | 5 - 45 °C (41 - 113 °F) |
Ambient Humidity | 10 - 90 % RH (non-condensing) |
Protection Grade | IP54 (indoor only, outdoor use possible with external cabinet, not included) |