It depends what kind of a meter you are getting. If you are getting a really high end one, they can be upwards of 500$ on eBay of Amazon. However, you can get some much cheaper off of these websites.
The pH is determined with a pH-meter.
A pH meter shows how acidic or basic a substance is
A pH meter determines acidity or alkalinity of a substance.
To test human pH level in saliva, you can use pH strips or a pH meter. You would collect a sample of saliva by either spitting into a clean container or using a swab, and then dip the pH strip into the saliva or place the electrode of the pH meter into the sample. The color change on the pH strip or the reading on the pH meter will indicate the pH level of the saliva.
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To measure pH accurately in a solution, you can use a pH meter or pH strips. A pH meter provides a digital reading of the pH level, while pH strips change color based on the pH level of the solution. Simply dip the pH meter probe or pH strip into the solution and read the pH value indicated.
The pH is determined with a pH-meter.
You need a pH-paper or a pH-meter.
We can use a pH paper.
A pH meter works by measuring the concentration of hydrogen ions in a solution. It uses a glass electrode that generates a voltage proportional to the pH of the solution. This voltage is then converted into a pH reading displayed on the meter.
Using a calibrated pH-meter with correction for temperature and slope.
Using a pH-meter the measurement is more accurate and sure.