The Optisonic 6300 ultrasonic flowmeter is available with a stainless steel sensor to meet harsh environmental conditions (i.e. corrosive environments). This complements the previously introduced general purpose aluminium version. It is a clamp-on ultrasonic flowmeter, which can be installed very quickly without dedicated training or special tools. Flow measurement can be done anywhere and start-up is immediate. With its robust industrial construction and regreasing concept the meter provides a revolutionary solution for easy handling. It has a high-quality, robust clamping mechanism suited for industry demands. The instrument monitors fluid anywhere where there is no need for high accuracy, regardless of pipe size or material. Moreover there is no need for process shut down and it reduces installation costs. Target applications for the stainless steel version include both offshore industry (crude oil measurements, produced water monitoring, water injection) and (petro-chemical plants with highly corrosive environments and other applications where stainless steel is preferred over aluminium.