It sounds like you don't have to worry about hurting the Arduino. In fact, you can probably just connect the sensors ground to ground on the Arduino, +5V to +5V, and AN to an analog input on the Arduino, and read the range using analogRead().
It sounds like you don't have to worry about hurting the Arduino. In fact, you can probably just connect the sensors ground to ground on the Arduino, +5V to +5V, and AN to an analog input on the Arduino, and read the range using analogRead().