pH sensor commonly used cleaning solution and ordinary cleaning method

Since the pH sensor is extremely delicate, removing the dirt stuck to the pH sensor requires sufficient patience, and an appropriate safety device is used during the cleaning process. Selecting the appropriate cleaning solution will make this job easier. Table 1 lists the cleaning solutions used in some cases.

When cleaning, immerse the sensor in the cleaning solution for at least 5 minutes so that the cleaning medium can seep into the dirt. Two washings of the sensor is an effective method. The sensor is first soaked in an acid or alkaline solution. During soaking, the sensor's electrodes are brushed with a soft toothbrush to remove the dirt. Then choose a solvent wash.

For example, the grease or organic residue can be selected from one of the four methods listed in the table for oil removal and grease removal in order to remove the dirt. Finally the sensor is rinsed and soaked in fresh water or salt solution (KCl).

Table 1 cleaning solution different from the case of a meteoric rise of troops

Applicable conditions Use solution General dirt 3% to 5% hydrochloric acid high-pressure water (<689.476kPa)
Oil or fat isopropyl alcohol (wear-resistant ethanol)
Methanol, other solutions that can remove special fat

PH sensor working under alkaline conditions W = 5% to 10% hydrochloric acid solution W = 3% ~ 7% sulfuric acid mixture of concentrated hydrochloric acid and phosphoric acid PH sensor working under acidic conditions W = 5% ~ 10% of hot alkali Sex solution (>56°C)
W=5% to 10% hydrochloric acid W=2% to 3% hydrofluoric acid

Sulfate and carbonate W=5% to 10% hydrochloric acid Concentrated hydrochloric acid and phosphoric acid mixed solution Mixture of sodium sulfite and sodium dithionite Silica or viscous W=2% to 1% hydrofluoric acid

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