Keep an eye on vibration to prevent machine damage
This company’s range of 4–20-mA sensing devices detect vibration in critical plant equipment components, such as motors, fans, pumps and compressors. The sensor family includes the PZDC piezoelectric and VEL/GDC electrodynamic, absolute velocity vibration transmitters, and the DNX80 relative-shaft vibration, thrust-position and speed-proximity probe transmitters. The electro-dynamic VEL/GDC sensor (photo) provides a 4–20-mA loop-powered output that is proportional to velocity vibration, and offers the advantage of dual-case isolation in conjunction with a low impedence circuit, making it ideal for high-noise environments, says the manufacturer. — Sensonics Ltd., Berkhamsted, U.K.