Diesel level transmitter + wave travelling speed. plz rply.

[mohansaini]

i have a project of ultrasonic based diesel sensor. But this is already in use but i wants to make it different then sound/ultrasonic wave. so please tell me is there any wave which travels below sound wave speed. the speed of sound wave is 340m/s..

 

[htg]

Re: Diesel level transmitter + wave travelling speed. plz rp

Surface wave travels much slower. But I do not think you can use it.