Figure 1.

Wireframe diagrams of 3D printable enclosures of the base model, comprising three components. 1) A main body with the Arduino Nano microprocessor, with slots for three buttons, a switch, and a telemetry screen. Next, interfacing with the Arduino through wired connections; 2) a light sensor apparatus comprising a white LED and the AS7262x spectral sensing unit mounted opposite to each other within a folding shroud that clips over a catheter outflow tube; and 3) a bar-type load sensor (TAL220) with built-in HX711 load cell amplifier with a hang point for the outflow bag.