Fangrui Product Details [main Function] The Water Level Sensor Can Record The Minimum/maximum Record Of The Water Tank Level. If It Is Installed On The Top Of The Water Tank, The Transmitter Will Quickly And Accurately Measure The Water Level Through The Ultrasonic Sensor, And The Temperature Through The Thermal Sensor.[convenient] The Screen Can Display The Temperature In The Box ( Or ) And The Temperature Of The Water Tank ( Or ) At The Same Time. The Receiver Can Stand On The Table Or Hung On The Wall, Which Is Very Convenient For Daily Use.[wide Range] Indoor Temperature Range: 0 60; Outside Temperature Range: -40 60; Temperature Accuracy: 1. Water Level Measurement Range: 0 15m, Resolution: 0.01m, Accuracy: +/- 0.03m.[multi-purpose] Ultrasonic Tank Level Gauge Can Display The Room Temperature, Temperature And Water Temperature (represented By A Bar Graph Of 10 Elements). You Can Save Min/max Records And Set Alarms For Specific Water Levels (high/low) Or Emptying.effective Distance Of 1 Foot: 30m/98.the Multifunctional Wate