A flow analyzer comprising: a flow body having a single-piece construction, the flow body including a flow path extending through the flow body along a flow direction between opposing inlet and outlet ports, first and second viewing members respectively disposed on the first and second sides of the flow path that extends through the flow body, each of the first and second viewing members including a window; an illumination unit including a light source disposed on the first side of the flow body and configured to illuminate fluid within the flow path through the first viewing member; an observation unit including an imaging device disposed on a second side of the flow body and configured to obtain image data of the fluid within the flow path through the second viewing member; and first and second spray elements respectively associated with the first and second viewing members, each spray element being configured to spray a cleaning fluid on the window of the opposing viewing element; wherein the flow body includes a branched cleaning fluid conduit having a single inlet opening that is in fluid communication with each of the first and second spray elements so as to provide cleaning fluid to each of the first and second spray elements from the single inlet opening, characterized in that the flow analyzer is configured as a subsea analyzer and in that the flow body includes a wiring conduit extending through the flow body substantially transverse to the flow direction from the first side of the flow body to the second side of the flow body, the wiring conduit being isolated from the flow path, the flow body being formed as a single integral piece by either being machined from one piece of material or by being cast in a single piece, and the wiring conduit being machined therein. a flow body having a single-piece construction, the flow body including a flow path extending through the flow body along a flow direction between opposing inlet and outlet ports, first and second viewing members respectively disposed on the first and second sides of the flow path that extends through the flow body, each of the first and second viewing members including a window; an illumination unit including a light source disposed on the first side of the flow body and configured to illuminate fluid within the flow path through the first viewing member; an observation unit including an imaging device disposed on a second side of the flow body and configured to obtain image data of the fluid within the flow path through the second viewing member; and first and second spray elements respectively associated with the first and second viewing members, each spray element being configured to spray a cleaning fluid on the window of the opposing viewing element; wherein the flow body includes a branched cleaning fluid conduit having a single inlet opening that is in fluid communication with each of the first and second spray elements so as to provide cleaning fluid to each of the first and second spray elements from the single inlet opening, characterized in that the flow analyzer is configured as a subsea analyzer and in that the flow body includes a wiring conduit extending through the flow body substantially transverse to the flow direction from the first side of the flow body to the second side of the flow body, the wiring conduit being isolated from the flow path, the flow body being formed as a single integral piece by either being machined from one piece of material or by being cast in a single piece, and the wiring conduit being machined therein.