UV Meter 254
PHOTOMETRIC ANALYSER OF ORGANIC SUBSTANCES
The UV Meter 254 is a spectrophotometric analyser for the determination of absorption at 254 nm. This parameter is a measurement related to many organic substances load in aqueous streams and therefore is often used to determine water quality. In many cases the absorbency determined by the analyser 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 analysis process lasts less than one minute and in many cases does not require sample pretreatment due to the automatic turbidity compensation.
FEATURES
- Turbidity, organic substances, suspended solids or dirt are automatically compensated through a differential measurement with a second detector at a different wavelength.
APPLICATIONS
- Surface water monitoring
- Potabilisers
- Water-treatment plants
TECHNICAL SPECIFICATION
| Feature | DESCRIPTION |
|---|---|
| Measured Parameters | COD UV, BOD UV, TOC UV, SAC254, abs 254 nm |
| Measuring Principle | Dual wavelength technique, 254 nm measuring and 590 nm as reference, with turbidity compensation |
| Measuring Range |
24 mm cell: 0.01 – 50 m-1 (COD: 0.15-100 mg/L, TOCeq: 0.06-40mg/L, BODeq: 0.05-30 mg/L) 16 mm cell: 0.01 - 100 m-1 (COD: 0 - 200 mg/L) 11 mm cell: 0.02 - 250 m-1 (COD: 0 - 500 mg/L) Up to 10,000 m-1 (COD: 20,000 with internal dilution) |
| Reproducibility | ± 2.5 % on the absorbency value for samples having turbidity below 100 NTU |
| Analysis Frequency | Freely programmable, batch near continuous analysis |
| Cycle Time | Less than 1 minute, including conditioning before analysis cycle and rinsing after measuring |
| Sample |
Pressure: Atmospheric Temperature: 5...50°C (41...122°F) Flow rate: 80 to 500 mL/min Connection: 6 mm (¼-in.) |
| Drain | Pressure-free, atmospheric drain Connection: 12 mm (½-in.) |
| Number of Streams | Up to 2 with integrated switching valve |
| Dimensions (LxWxD) | 604x380x242 mm |
| Weight | Approx. 20 kg (44 lbs) |
| Power Supply |
Voltage: 100 - 240 VAC 50/60 Hz standard or 24 VDC (option) Power consumption: max. 80 VA |
| Outputs | 2x4-20 mA outputs for measured data, Modbus RTU RS485 |
| Alarms | 2 SPDT programmable potential free relays |
| Digital Input | Remote start/stop, start extra cycle, skip idle time, emergency stop |
| Installation | Wall mount (standard), bench top supporter panel mount (options) |
| Protection Grade | IP54 |