Ultrasonic ranger - cable length


I am new to this site so I hope I am not repeating something already discussed.

I hope to use the Ultrasonic ranger in conjunction with a GrovePi and a Raspberry Pi as a water level meter. Problem is I need the distance between the GrovePi and the Ultrasonic ranger to be fairly substantial. What is the maximum length for the connecting cable which will still maintain reliable operation. Would it help to use twisted pair cabling.

Thanks in advance.