pH Sensor

                                                          pH Sensor

Introduction

The reason why we have to calibrate the sensor is so it has range of pH levels to work from and by this range of pH levels it can work out a pH of a substance. The reason why we use a pH sensor instead of an indicator is because it is more accurate and when you use an indicator it is hard to find out what colour the substance changes and what pH level it has got.

Method

1. Open up the calibrate program on your computer.
2. Tell the computer the pH and the click the next button.
3. Buffer solution → solution of a known pH.
4. Set the first pH to 4 insert probe in to the solution then click next.
5. Clean the probe with distilled water then dry the probe with cotton.
6. Then insert the probe in to the second solution then click next.
7. Then clean the probe again with distilled water and dry the probe with cotton.
8. Then insert the probe into the last solution and then click next.
9. Then disconnect the pH sensor then reconnect it.
10. After this you should click set sensor range then select user calibration and then click the exit button.
11. Then you should clean the probe again with distilled water and clean it with a cotton piece.
12. To test if the experiment has worked you should put some water in to a beaker then put some water in to the water. The result that you should get is a pH level of seven.
13. To check if the experiment works try it again.