| GENERAL FEATURES&SPECIFICATIONS | 一般功能和规格 |
| | AR-841 | AR-851 |
| Measuring Range | 0.5～15m | 0.5～15m(single Unit) |
| 测量范围 | 1～60m(Double Unit) |
| Accuracy | ±0.5% | ±1.5%(single Unit) |
| 测量精确度 | ±2%(Double Unit) |
| Measure In Imperial/Metric | √ | √ |
| 公英制转换 |
| Operation Condition | 0～30℃ | 0～30℃ |
| 工作环境 | 30-70%RH | 30-70%RH |
| Laser Pointer Aiming Selection | √ | √ |
| 激光定位 |
| Low Battery Indication | √ | √ |
| 低电显示功能 |
| 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 |
| 响应时间 |
| Measureing Benchmark Setup | √ | √ |
| 测量基准设置 |
| Single Or Double Unit Measure Selection | _____ | √ |
| 单机和双机测试选择开关 |
| WorkFrequency | 40khz | 40khz(single Unit) |
| 工作频率 | 20khz(Double Unit) |
| Key Sound,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 |