ultrasonic pulse velocity tester

Ultrasonic transducer is designed for rugged use on construction sites and similar outdoor environments.This transducer is built to both send and receive ultrasonic waves and convert them to a voltage output.

So that means you have to do something with analogRead()

void setup()
{
  Serial.begin(115200);
}

void loop()
{
  int x = analogRead(A0); // assume sensor connected to A0;
  float voltage = x * 5.0 / 1023;

  Serial.print("Voltage:\t");
  Serial.println(voltage, 3);  // 3 decimals;
  
  delay(1000);  // don't use delay in your final code
 }

your turn to come up with an electric schema and improved prototype code