德国Vallen www.vallen.de
AMSY-5型超高速、全数字、全波形、强抗干扰声发射采集分析系统是由德国华伦公司在1997年开发的全数字多通道声发射仪器AMSY-4型的基础之上，根据多年数字电路的设计和制造经验，采用目前最先进的可编程FPGA数字技术，设计并制造的性能优越的声发射仪器。 
Welcome to Vallen Systeme GmbH, The Acoustic Emission Company
Founded more than 20 years ago, Vallen Systeme GmbH is specialized on developing and manufacturing of instrumentation for Acoustic Emission (AE).
Providing advanced technology, Vallen Systeme introduced a number of novelties into the field of Acoustic Emission: the first digital Acoustic Emission system AMS2 in 1986, the first 32 Bit Windows Acoustic Emission Software 1998.
Dedication to service, reliability, and performance results in numerous satisfied customers worldwide. Our Acoustic Emission systems are proven in field service as well as laboratory research