| general features & specifications | 一般功能和规格 | |
| | | |
| ar-842a | ar-852a | ar-872s |
| temperaturerange | -18℃～330℃ | -18℃～500℃ | -18℃～1050℃ |
| 测温范围 | 0～626℉ | 0～932℉ | 0～1922℉ |
| accuracy | ±2%or±2℃ | ±2%or±2℃ | ±2%or±2℃ |
| 测温精确度 |
| ℃/℉ se-lection | √ | √ | √ |
| ℃/℉温度单位转换 |
| distance spot ratio | 12:1 | 12:1 | 12:1 |
| 测量距离比率 |
| data hold function | √ | √ | √ |
| 数据保持显示功能 |
| auto power shut off | √ | √ | √ |
| 自动关机功能 |
| emissivity | √ | √ | √ |
| 发射率 |
| backlight display se-lection | √ | √ | √ |
| 背光显示选择功能 |
| laser target pointer se-lection | √ | √ | √ |
| 镭射目标显示选择功能 |
| average and difference function | √ | √ | √ |
| 平均值和温差测量功能 |
| max and min function | √ | √ | √ |
| zui大、zui小值测量功能 |
| high low temperature alarm setup | √ | √ | √ |
| 高低温报警设定功能 |
| data store/recall function | √ | √ | √ |
| 测量数据储存功能（断电记忆） |
| response time & wavelengh | 500ms & (8-14)um | 500ms & (8-14)um | 500ms & (8-14)um |
| 响应时间和响应值长 |
| repeatability | ±1%or±1℃ | ±1%or±1℃ | ±1%or±1℃ |
| 重复性 |
