RC series speed sensors (geophones) are mainly used for vibration monitoring of power plant generator sets, fans, rotating machinery, blasting, etc., and are also widely used in pile foundation detection and oil exploration.?Vibration sensors (geophones) generally choose to use combined detection in the field to improve the discharge speed and reduce connection errors.?That is, a series of geophones which are specially produced to connect several geophones together in a certain way, this is the geophone string.