Queen Mary Hospital

Vibration Monitoring Helps Keep a Hospital Healthy


Administrators of Queen Mary Hospital, a 1,706-bed general and teaching hospital located on the island of Hong Kong, were concerned that vibrations from a large, multi-year construction project, slated to begin nearby, might compromise the structural integrity of the 28-story building’s air conditioning equipment. Having no air conditioning, even temporarily, was not an option for the hospital: windows could not be opened without potentially compromising the health of patients; negative-pressure rooms were required to ensure that hospital air (and potential pathogens) could not escape. The air conditioners needed to be operational 24/7; their integrity needed to be monitored continuously during the construction process to ensure that the hospital could continue to deliver the highest standard of care.


Solution:  Inzwa Veva III Vibration Monitors Fit Where Others Could Not

The hospital and Hong Kong’s Electrical & Mechanical Services Department (EMSD) chose to monitor the vibration of the air conditioning pipes in the 449-foot-tall building with seven Inzwa vibration monitoring devices. Wireless and light weight, their compact size and ability to auto-orient -- regardless of how they were installed -- made it possible to affix them directly to the ductwork’s curved surfaces and in optimal yet hard-to-reach locations (some of which were located high overhead which would have been inaccessible to larger, geophone-based solutions).

With robust reporting requirements the four integrated D-cell lithium batteries provided over six months of autonomous and continuous reporting without requiring an external power supply or replacement, minimizing the number of site visits required to maintain the devices. Each device’s configuration and status was visible 24/7 and easily managed remotely. In a basement location where 3G signal was poor, technicians were able to replace the existing antenna with an antenna cable to extend it to a location with better reception.


These devices have been installed and continuously monitoring the vibration of the air conditioning ducts for over a year. Vibration monitoring is planned to continue until the construction project is completed in 2021.


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