ＳＮ声纳测距报警仪河南财经学院节能电子设备厂郝福俊ＳＮ声纳测距报警仪，是采用军事声纳探测技术研制成的一种新型报警设备。它有距离数字显示、可调距声光报警、距离优先选择、多接口扩展多种功能、也可作为母机再开发，是一种理想的测距报警显示装置，且它体积小，安... SN sonar rangefinder alarm Henan University of Economics and energy-saving electronic equipment factory Hao-Jun SN sonar rangefinder alarm, is the use of military sonar detection technology developed into a new type of alarm equipment. It has a distance from the digital display, adjustable distance sound and light alarm, distance priority, multi-interface extension of a variety of functions, but also as a mother redevelopment, is an ideal ranging alarm display device, and it is small, safe. .