Which of the following sensor is used to measure the acid/alkali addition?*a) pHb) Redoxc) Temperatured) Oxygen

To determine which sensor is used to measure acid or alkali addition, we need to analyze the functions of each sensor option provided.

1. pH Sensor: This sensor measures the acidity or alkalinity of a solution based on the concentration of hydrogen ions (H+). A low pH value indicates acidity, while a high pH value indicates alkalinity. Therefore, it is specifically designed for monitoring acid and alkali levels.

2. Redox Sensor: This sensor measures the oxidation-reduction potential of a solution but does not specifically indicate acidity or alkalinity.

3. Temperature Sensor: This sensor measures the temperature of a solution and has no direct correlation with acidity or alkalinity.

4. Oxygen Sensor: This sensor measures the concentration of dissolved oxygen in a solution and is unrelated to acid or alkali measurement.

Conclusion

The sensor used to measure acid or alkali addition is a) pH sensor.