The AV411 is a dual-input, low-range dissolved organics monitor for potable water treatment, measuring dissolved organic carbon from 0 to 20 mg/L C. It uses UV absorbance at 254 nm with automatic turbidity compensation at 400 nm, enabling reagentless operation. The system features programmable automatic optical cleaning, two isolated 0-20 mA current outputs, and three programmable relay outputs. The transmitter operates on 85-265 V AC or 9-36 V DC, has IP65 protection, and measures 192 × 230 × 94 mm. The sensor measures 327 × 410 × 162 mm and weighs 6 kg. Calibration requires demineralized water and a phthalate standard, needed once or twice annually. The UV lamp, rated for 1.2 × 10⁹ flashes, operates at 13% of its rated life over 10 years. It meets EN61326, EN50081-2, EN50082-2, and EN61010-1, with CE and UL certification.
AV411 UV254 dual-channel, low-range dissolved organics monitors are designed for use on potable water treatment plants. In particular, they can be used to monitor the quality of the outlet from sand and carbon filters to provide a THM precursor measurement.
Long term field trials have shown that maintenance demands on these applications are minimal.
| ABB Measurement & Analytics | |
|---|---|
| Product Category | Dissolved CO2 Instruments |
| Product Number | AV411 |
| Product Name | Dissolved Organics Monitor |
| Form Factor | Panel (optional feature); Wall, Pipe |
| Communication Network/Bus Compatibility | PROFIBUS |
| Features and Functionality | Extreme Environment |
| Dissolved CO2 Range | 0 to 20 ppm |
| User Controls | Digital Front Panel |
