红外线测温低度DT-8220特征：
◆ Temperature Range                       -50℃～220℃
    测量范围                                           -58℉～  428℉
◆ Accuracy                                          ±2% or 2℃
    测温精度
◆ Distance Spot Ratio                         1:1
    测量距离比率                
◆ Emissivity                                         0.95
    发射率
◆ Response Time & Wavelength         500ms & (8-14)um
    响应时间和响应值长
◆ Repeatability                                    ±1% or±1℃
    重复性
◆ Resolution                                        0.1℃or 0.1℉
    解析度
◆ ℃/℉ Selection                                  √
    ℃/℉温度单位转换
◆ Data Hold Function                           √
    数据保持功能
◆ Auto Power Shut Off                         √
   自动关机功能
◆ Low Battery Indication                      √