EHM-D-KNOCK Monitors machine knocks, clicks, and other spurious noises from equipment that might indicate loosening or wearing components about to fail.
EHM-D-FLOW Acoustically monitors the flow of a liquid in a pip to verify upstream components are functioning correctly. Particularly suitable for areas around turbid flow (around valves, joints, elbows, etc.).
EHM-D-SONIC Monitors human acoustic noise levels for increases in applications where the characteristic can be heard and perhaps other methods are not possible.