dryness tester

例句：

1. 1. This instrument is used to measure the dryness of the air in a room.
   这个仪器用于测量房间内空气的干燥程度。
2. 2. The dryness tester was used to check the moisture content of the soil.
   干燥度测试仪被用来检查土壤的水分含量。
3. 3. The dryness tester showed that the room was not as dry as expected.
   干燥度测试仪显示房间并不像预期的那样干燥。