AV410 single-channel UV254 low-level dissolved organics monitors (0 to 20 mg-1C) are designed for use on potable water treatment plants.

AV411 UV254 dual-channel, low-range dissolved organics monitors are designed for use on potable water treatment plants.

AV412 UV254 dual-channel, low- and high-range dissolved organics monitors are designed for use on potable water treatment plants.

AV420 single-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.

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

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.