Fluid/urine monitoring devices and/or systems are provided for monitoring fluid output, including volume and flow rate. One high resolution, low cost electronic urine monitoring device and system collects urine and includes a capacitance sensor. The capacitance of the capacitance sensor may be correlated with fluid content and be used to identify urine volume and flow rate. Another high resolution, low cost flow meter is placed in line with drainage tubing and uses a capacitance sensor to measure fluid output without collecting the fluid. Other low cost urine monitoring devices use pressure based or weight based measurement sensors to measure volume and flow rate.
