American Waterproof Ultrasonic Sensor 

1). Waterproof Ultrasonic Sensor
2). Diameter:14mm;
3). Frequency:40KHz;
4). SPL:min.100dB;

5). Receiving sensitive:min.-84dB;

6). Capacitance:2000pF±20%;

7). Directivity:70°;

8). Operating Temperature:-40°c~+80°c;

9). Storage Temperature:-40°c~+85°c;