Measurement of Water Depth in a Class A Pan Using Ultrasonic Transducer and Programmable Logic Control (PLC)

The aim of this study is to compare water depths measured by manually and PLC from a Class A Pan in field conditions using ultrasonic transducer. was conducted garden Faculty Agriculture, University Kahramanmaras Sutcu Imam the summer season 2019. steel meter used measure depth evaporation pan. Using transducer, pan between 140 223 mm at 8:00 am. An transducer attached one end sliding buttress, which 50 cm above its inner-bottom center set be able read calibrated buttress. program written CODESYS-ST language PLC, connected uploaded PLC. With program, digital were converted millimeter depths. To more accurately, each value determined averaging 30 measurements made successively 300 millisecond intervals. In processes, moving average method used. Water saved on SD (secure memory) card. manual measurements, there 26 observations. measurement dates matched with regression analysis performed pan, determination coefficient (R2) result as 0.96. Mean Absolute Percent Error (MAPE) these two data sets calculated 2.3%. level agreement sets; if MAPE below 10%, it considered “very good”. results revealed that could close an