Have you tried connecting it and using the sample NewPing sketch? By the pin labels, it sounds like it could work as-is. The 120V is a little confusing, but the specs seems a little thin to begin with. Got a picture or more information?
Tim
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i tried simple new ping sketch but it just reads up to 40cm and not so much accurate , in you sketch the ping pulse is 1 pulse with 10us width i think if we manipulate the code to 2 or 3 pulses with 16us width it will solve my problem,and i think we have to increase the frequency too.how should we change the code?