Abstract
Urine is excreted at core temperature, 37 °C. Noncontact matrix temperature sensors simultaneously measuring the temperature of 16 areas were utilized to estimate the volume of urine in a toilet. Two temperature sensors were installed face to face under the toilet seat. In this preliminary study, water at 37 °C was dropped at various flow volumes, flow rates and drop positions.The integrated value of the 3/2 power of the temperature change for the 16 areas increased with the flow volume and remained constant with the increase in flow rate.
