Modular monitor

A device to monitor a machine, the device comprising:

• a battery pack housing;
• said battery pack housing including therein a battery pack module;
• and
• a sensor module housing;
• said sensor module housing including therein a sensor module;
• said battery pack housing being configured to be attachable and removable from said sensor module housing;
• said sensor module including a circuit board;
• said circuit board including
• a substrate,
• a vibration sensor mounted on said substrate and configured to produce a vibration signal relating to vibration of the machine,
• a temperature sensor mounted on said substrate and configured to produce a temperature signal relating to a detected temperature,
• a motor flux sensor mounted on said substrate and configured to produce a motor flux signal relating to an amount of motor flux emitted by the machine, and
• a processor mounted on said substrate and in communication with said vibration sensor, said temperature sensor, and said motor flux sensor;
• said battery pack housing being configured such an interior of side walls of said battery pack housing overlaps exterior of side walls of said sensor module housing;
• said battery pack housing being configured to form a top for said sensor module housing and encase said side walls of said sensor module housing within said battery pack housing;
• said battery pack housing including slots;
• said sensor module housing including fasteners and an O-ring;
• said fasteners being integral to said sensor module housing and configured to interact with said slots to secure said battery pack housing to said sensor module housing;
• said O-ring being located on said exterior of said side walls of said sensor module housing such that said O-ring engages said interior of said side walls of said battery pack housing when said battery pack housing overlaps said sensor module housing.