The PiezotronR Acoustic Emission Sensor with an integral impedance converter can be used for measuring acoustic emission (AE) above 50 kHz in bearing based machine structures, high pressure vessel, compressor or valves. With its small size, it easily mounts near the source of emission to optimally capture the signal. A M6 or .-28" bolt is all that is needed. Available in both intrinsically or non-intrinsically safe versions, this very rugged sensor has a welded housing for degree of protection IP65 with high temperature operation up to 165°C.