The AV412 is a dual-input dissolved organics monitor that combines high-range (0 to 100 mg-1C) and low-range (0 to 20 mg-1C) measurements in one instrument, enabling simultaneous monitoring of pre-coagulation and post-filtration water quality. It uses UV absorption at 254 nm with automatic turbidity compensation at 400 nm, eliminating the need for reagents or sample filtration. The transmitter features two isolated 4-20 mA outputs, three programmable relay outputs, and a backlit LCD display with energy-saving auto-off. It operates on 100-240 V AC or 12-30 V DC, has an IP65 enclosure, and meets EN61326 for electromagnetic compatibility and EN61010-1 for safety. The sensor is mounted via wall or pipe bracket, with programmable automatic optical cleaning and a lamp rated for 1.2 × 10⁹ flashes. Maintenance is minimal, requiring only annual wiper blade replacement and infrequent calibration.
AV412 UV254 dual-channel, low- and high-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 | Conductivity and Resistivity Meters |
| Product Number | AV412 |
| Product Name | Dissolved organics monitor |
| Water Quality Parameters | Measures Conductivity / Dissolved Solids |
| Form Factor | Panel; Wall, Pipe |
| Display Type | Digital |
