Sensor

[n@umansab786]

How to make Ultrasonic Sensor Simple for Distance in Labview in Window

[RavensFan]

That's like posting a question  "How do I drive a car?"

Read  http://www.catb.org/~esr/faqs/smart-questions.html

Then provide some details for what you are trying to do, the steps you've taken in LabVIEW, and where you are stuck.

[Henrik_Volkers]

Simple: Use a US-piezo disc, connect it to the line in of your soundcard.

If an object is crashing the piezo, you get a signal and you know the distance is zero 😄

Serious: look for a sensor that matches  the connection capabilities you have.... and the budged you have 😉