APPLICATION NOTES   Rotating condition monitoring can be performed by using ranges of MHC (=Machine Health Checker) products in order to identify the machine conditions. Such machines are bearings (rolling element bearings and journal bearings), gearbox, pulley, pump and etc. The affordable, simple to use, fast, effective and high accuracy can help engineer and technician to prevent their machines from break down. Ensuring the structural integrity of ageing infrastructure is an area of increasing concern at an international level. Holroyd Instruments has recognised the unique role that Acoustic Emission (AE) can play in providing a sensitive alert to when and where degradation is occurring, whether in terms of global or ‘hot-spot’ monitoring. The SIMPAL system is the tool for bridge & structural monitoring. Pipeline is the common parts in petrochemical industry. The effective way of monitoring pipeline can enhance the productivity, reduct cost of machine down time and protect the health and safety. The Multi channel AE-DSP can be used to detect the crack initiation and growth in the pipeline effectively.