Optical Flow Meter
Photon Control's Focus® Probe optical flow meters are measuring flow rates of biogas at sewage digesters in Vancouver. The methane-rich biogas posed a problem for conventional flow meters. Using optical laser beams to measure the velocity of naturally occurring particulates, the device determines flow despite pipe vibration, acoustic noise, and gas condensation. Featuring a high turn-down ratio of 1000:1, the device provides a source of data to help optimize sewage digestion, control biogas production, and reduce greenhouse gas emissions.