The use of ultrasound instruments for inspection of steam traps and detect steam leaks is discussed. The light-weight and portable instruments translate high-frequency sounds produced by operating steam traps into an audible range. The users can hear the sounds through headphones and view these sounds on a meter or display panel. The handheld instruments generally come with headphones, a meter or display panel, a sensitivity/volume adjustment, and interchangeable modules for scanning or contact. The ultrasound instruments can be used in both contact and noncontact modes.