Over the past decade, trending vibration parameters has become the most widely-used technology for monitoring machinery health. Industrial accelerometers have become the workhorse in the Predictive Maintenance market. These sensors are extremely rugged, provide a wide dynamic range, and are available in a variety of configurations to meet individual installation requirements. This paper/presentation outlines the basic design characteristics of accelerometers. Special attention will be given to describing the criteria that makes up specialty sensors such as a low frequency accelerometer. Application guidance will be given regarding installing accelerometers, mounting techniques, and cabling.