Ultrasonic sensors – the alternative for difficult surfaces

Greetings,

I am trying to find a sensor that I could update te range to a max range of 127mm or 5", are your sensors teachable with buttons or do I need software? Thanks!

How to increase the sensing range of HC-SRO4 ultrasonic sensor from 400cm to 900cm?

is this sensor detects 1 cm width of objects

What is the range of ultrasonic waves

what is the frequency that it emits?

Am amazed with the technology of yours... but what will happen if there was a foam above the liquid level.. how will this technology give us the correct reading? can you explain if possible