Kernico Instruments Co. (El Paso, TX) says its 41E10 electronic vibration switch, with its 4- to 20-mA output, is designed to offer reliable vibration protection for rotating machinery such as fans, cooling towers, pumps, motors, and more. It can be bolted directly to a machine. Included are alarm and trip shutdown relays and signal outputs for local or remote metering purposes. According to the company, it offers a frequency response range of 3 to 1,000 Hz.