Ph metre

WHY  do you want non contact and will inaccurate reading be acceptable 

He doesn't want to have to clean the pH electrodes.

He doesn't want to have to clean the pH electrodes.

1. I want to clean pH probes with a simple method, but I could not find a simple and effective method. I can only do this with ultrasonic cleaners. I don't know what liquid to use for this.

An ultrasonic cleaner is quite simple and straightforward to use and your lab should already have one and buffer solution. I already answer this question in private: 

24 Dec 2024

• • 2:07 PM

  Miraç keyvan

  Actually, I'm wondering if a normal pH sensor probe can be cleaned in an ultrasonic cleaner.
• • 2:23 PM

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  anniel747

  Yes, you can clean a pH sensor probe in an ultrasonic cleaner.
• • 4:00 PM

  Miraç keyvan

  Thank you very much. So, what temperature should it be? How many kHz should the liquid inside be? Is tap water acceptable as a cleaning fluid or what kind of liquid should be used?
• • 4:31 PM

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  anniel747

  Use warm (~120°F) 4.0 molar KCI (potassium chloride) solution or warm 4.01 pH buffer solution for pH electrodes unless you have a specific contaminant. Variable frequency ultrasonic cleaners are best. Only deionized or distilled water should be used for rinsing.
• • 4:39 PM

  Miraç keyvan

  Thank you very much, I have a few more questions for you. I'm sorry, I'm taking your time. I'm testing an oily and sticky sample, cake cream, so I use it with a probe test 15 times a day.

• • 4:50 PM

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  anniel747

  Can you give a list of ingredients? Oil is better cleaned 1% (0.5N) HCl solution unless heavy contamination.
• • 5:00 PM

  Miraç keyvan

  pastry cream pH range is 7.0 to 5.0, milk, egg, sugar, starch are used, margarine, vanillin, liquid cake whipped cream, these are:

• anniel747

  I would use warm 4.01 pH buffer solution as a start and see if there is specific residual contaminants.
• • 5:12 PM

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  anniel747

  You should copy this conversation in the public thread, others may have expertise in the food industry.
• • 5:12 PM

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  anniel747

  I don't.
• • 5:13 PM

  Miraç keyvan

  So, would it be a problem if we drop liquid detergent into tap water and clean it with an ultrasonic cleaner?
• • 8:12 PM

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  anniel747

  Yes.
• • 10:22 PM

  Miraç keyvan

  How can this be a problem?

• 25 Dec 2024
• • 12:43 PM

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  anniel747

  Tap water is dommageable to pH electrodes and has it's own contaminants.
• • 1:18 PM

  Miraç keyvan

  So, is there an easier, more practical way to clean this probe?
• • 1:27 PM

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  anniel747

  Yes, use warm 4.01 pH buffer solution.
• • 1:27 PM

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  anniel747

  https://ca.hach.com/buffer-solution-ph-4-01-0-02-4-l/product-details?id=14533970669#

Unfortunately, this system will not be used in the laboratory and pastry cream tests will be performed 20 times a day.

Your production line has no QC lab? The QUANTOFIX Relax can run on 6 AA batteries and it can perform 50 tests per hour.