Nitrites
Nitrites
NO2-
Applications
- Drinking water
- Process optimisation of wastewater treatment plants
- Industrial and municipal wastewater
- Mineral water monitoring
- Surface water
Description
The determination ranges of the nitrite analyzer vary from trace μg/L to 125 mg/L NO2 using the (optional) internal dilution module. The result can be expressed as NO2 or N-NO2.
Method
In acidic media, nitrites react with sulfanilamide and N-(1-naphthyl)-ethylene diammonium dichloride, forming a purple colored dye. The absorbance intensity is proportional to the nitrites concentration in the sample and is determined at 525 nm.
Reagents
- Nitrite reagent kit 1l r1 r2
- Nitrite reagents ready to use 500 ml r1 r2
- Nitrite reagents ready to use 1l r1 r2
Standard solutions
Features
| Range (Ø 26 mm) |
500 ppb N-NO2 (1.6 ppm NO2) |
| Range (Ø 16 mm) |
1 ppm N-NO2 / (3.2 ppm NO2) |
| Range (with dilution) |
40 ppm N-NO2 / 125 ppm NO2 |
| Wavelength | 525 nm |
| Number of reagents | 2 |
| Min. analysis time | 6 minutes |
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) |