proportional sampling device

例句：

1. 1.This proportional sampling device can accurately measure the concentration of pollutants in water.
   这种比例采样装置能够准确地测量水中污染物的浓度。
2. 2.The manufacturer claims that their proportional sampling device is more accurate than others.
   制造商声称他们的比例采样装置比其他设备更准确。
3. 3.The proportional sampling device was used to collect samples from different areas of the city.
   使用比例采样装置从城市的不同区域收集样本。