WEIHAI SUNFULL GEOPHYSICAL EXPLORATION EQUIPMENT CO., LTD. We provide a wide variety of high temperature geophones / velocity transducers for applications such as vibrating monitoring, seismic monitoring or spindle diagnostics. These series have been tested at 200°C extensively and results show a product of quality. Our production facilities are located in China therefore competitively priced. We are looking forward to your response and a possible cooperation. *****