Photon Control's Focus® Probe optical flow meters are successfully measuring flow rates of biogas at sewage digesters in Vancouver. 

The methane-rich biogas posed a problem for conventional flow meters which could not cope with the low flow rates, low pressure and high humidity specific to biogas. 

Using optical laser beams to measure the velocity of naturally-occurring particulates, the Focus® Probe enables highly accurate flow determination despite pipe vibration, acoustic noise and gas condensation. 

Featuring a high turn-down ratio of 1000:1, the low-cost Focus® Probe provides sewage treatment authorities with an excellent source of data to optimize their sewage digestion processes, control biogas production and reduce greenhouse gas emissions.  For further info, please visit www.photon-control.com