ar821|超声波测距仪|的详细介绍
general features & specifications 一般功能和规格
ar-811 ar-821 ar-831  
measuring range 0.30～15m 0.30～15m 0.30～15m  
测量范围 10inch～50foot 10inch～50foot 10inch～50foot  
accuracy ±1% ±1% ±1%  
测量精确度  
measure in imperial/metric √ √ √  
公英制转换  
dynamic display √ √ √  
动态读数显示  
laser pointer aiming √ √ √  
激光定位  
data store /recall √ ____ ______  
存储/调出数据  
computer area and volume √ √ √  
计算面积和体积  
sum of length √ √ √  
计算长度累加  
auto/manual shut-off √ √ √  
自动/手动关机  
lcd backlight √ √ √  
lcd 背光显示  
response time 2s 2s 2s  
响应时间  
measureing benchmark setup √ √ √  
测量基准设置  
keysound,beeps for wrong reading and reading confirmation √ √ √  
按键声提示,出错声音提示 √ √ √  
以及确认声音提示