You now have your sensor, but if you want to sense in more than just one direction, you could use several sensors, each mounted to a different side of the robot. However, there is a way to use servos to move your sensor, which allows you to use a single sensor to sense in several directions.
The simplest way to avoid having to purchase and configure several sensors is to mount the sensor on a single servo, then use a servo bracket to connect this assembly to the platform. Using the sonar sensor, the assembly will look something like this:
Make sure you connect your servo to the servo controller; it can fit into any open connection. I am connecting mine to my quadruped that has eight servos to control, so I have connected mine to the eighth connection on the servo controller board. Here is an image: