The SN6 is a portable respirometer designed for on-site monitoring of the health status of autotrophic and heterotrophic bacteria, as well as control of discharges. For this, the SN6 consists of oxygen, pH and Redox probes.

The SN8 is an online respirometer which is designed to interact with the process and serve as a tool for better control and optimization. For this purpose, the SN8 has sensors for oxygen, pH and Redox and optionally for ammonium. It can also be configured to control either one or two biological reactors with the same unit.