408WPSR 1. high quality and reliable in low cost 2.application in 2-d & 3-d seismic exploration. 3.suitable for land,transition zone,mar. Gd series vibration sensor. Is my company developed specifically for engineering testing (such as pile and foundation detection ),large mechanical equipment vibration sensor for use. With high protection degree,reasonable damping coefficient,high resolution.suitable for. High resolution measurement,and has the advantages of small volume,light weight,convenient installation and operation. Velocity type transducer(referred to as the speed gauge).the product has the advantages of simple structure,strong resistance to dry,wide frequency band,high resolution,with sensitivity with incentive(or vibration)frequency increased compensation characteristics,high frequency information in transmission of signal attenuation.and the speed of the output signal can be directly collected.is the ideal dynamic measurement sensor. 4.Wpsr cable for 408 system advantages: high quality and reliable in low cost, application in 2-d & 3-d seismic exploration, suitable for land,transition zone and so on.