fluor tester

例句：

1. 1. The fluor tester is used to measure the amount of fluoride in water.
   氟测试器用于测量水中的氟含量。
2. 2. The fluor tester can detect the presence of fluoride in various materials.
   氟测试器可以检测各种材料中的氟含量。
3. 3. The fluor tester is essential for ensuring the safety of drinking water.
   氟测试器对于确保饮用水的安全至关重要。