The AV422 is a dual high-range dissolved organics monitor for surrogate color measurement in potable water treatment, detecting dissolved organic carbon from 0 to 100 mg/lC for coagulation control and algal bloom alert. It uses reagentless, dual-wavelength UV absorption (254 nm and 400 nm) with automatic turbidity compensation. An internal wiper cleans the optics at programmable intervals from 15 minutes to 24 hours. The lamp is rated for 1.2 × 10⁹ flashes, consuming only 13% of its rated life over 10 years. The transmitter is IP65 rated, sized 192 × 230 × 94 mm, and operates on 100-240 V AC or 12-30 V DC. It includes two isolated 4-20 mA outputs and three programmable relay outputs. Complies with EN61326, EN50081-2, EN50082-2, and EN61010-1; certified to CE and UL standards.
AV422 dual-channel high-level dissolved organics monitors act as surrogate color monitors on coagulation control applications to provide early warning of increase in organics from decay of algae blooms for potable water treatment works
Long term field trials have shown that maintenance demands on these applications are minimal.
| ABB Measurement & Analytics | |
|---|---|
| Product Category | Dissolved CO2 Instruments |
| Product Number | AV422 |
| 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 100 ppm |
| User Controls | Digital Front Panel |
