Applications
- Drinking water
- Process optimisation of wastewater treatment plants
- Industrial and municipal wastewater
- Mineral water monitoring
- Surface water
Description
The 3S-UV254 is a spectrophotometric analyzer for the determination of absorption at 254 nm. This parameter often called SAC (Spectral Absorption Coefficent) is a measurement related the organic load in aqueous streams and therefore is often used to determine water quality. In many cases the absorbance determined by the analyzer at 254 nm can be related to the organic content sum parameters such as TOC, COD and BOD by applying an appropriate conversion factor. The analyzer absorbance value can be also calibrated on a specific target substance. The analysis process lasts less than one minutes and in many cases does not require sample pretreatment due to the automatic turbidity compensation.
Method
The determination of dissolved organic substances is performed photometrically at 254 nm. To minimize the inteference of the sample turbidity or other matrix effects a second measurement at 590 nm is taken. The compensated absorbance is proportional to the concentration of dissolved organic substances that absorbs in the UV region.
Features
| Measured parameter | UV254 |
| Wavelength | 254 nm |
| Demineralized water | Not required |
| Min. analysis time | 1 minutes |
Reagents and standards
- No reagents required.
- See standard solutions for UV254 analyzer.
The determination of dissolved organic substances is performed photometrically at 254 nm. To minimize the inteference of the sample turbidity or other matrix effects a second measurement at 590 nm is taken. The compensated absorbance is proportional to the concentration of dissolved organic substances that absorbs in the UV region. This measurement is often correlable with the COD value of the sample.
Features
| Measured parameter | COD |
| Wavelength | 254 nm |
| Demineralized water | Not required |
| Min. analysis time | 1 minutes |
Reagents and standards
- No reagents required.
- See standard solutions for COD analyzer.
Technical Specifications
| Model | 3S-UV254 |
| 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 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) |