potentiometric pH meter

例句：

1. 1.The pH meter was used to measure the acidity of the solution.
   pH计被用来测量溶液的酸性。
2. 2.The pH meter was used to determine the optimal pH for the fermentation process.
   pH计被用来确定发酵过程的最佳pH值。
3. 3. The pH meter was used to monitor the pH levels in the industrial wastewater treatment plant.
   pH计被用来监测工业废水处理厂的pH水平。