SDT Checkers 

Choose the right Checker for the right job!  Whether you need to check leaks, traps, lubrication or tightness SDT has a Checker for you.  The Leak Checker, Lube Checker, Trap Checker and Tightness Checker are individual checkers for individual applications.

With the affordable Checkers you can find and fix leaks fast, easily find failed steam traps, make sure bearings receive the right amount of grease at intervals, find leaks in any volume, pin point the smallest leaks and more.
Available SDT Checkers:

Leak Checker
Trap Checker
Lube Checker
Tightness Checker

More info:
http://www.machinereliability.com/product-catalogue/ultrasound/ultrasound