reaction time tester

例句：

1. 1.This tester is used to measure the reaction time of a chemical reaction.
   这个测试仪用于测量化学反应的反应时间。
2. 2. The tester can detect any irregularities in the reaction process.
   测试仪可以检测反应过程中的任何异常。
3. 3. The tester was designed to ensure the accuracy of the reaction time measurement.
   测试仪的设计旨在确保反应时间的测量准确性。