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2. pH meter - Wikipedia

   en.wikipedia.org/wiki/PH_meter

   A simple pH meter Soil pH meter. In general there are three major categories of pH meters. Benchtop pH meters are often used in laboratories and are used to measure samples which are brought to the pH meter for analysis. Portable, or field pH meters, are handheld pH meters that are used to take the pH of a sample in a field or production site. [19]

3. List of measuring instruments - Wikipedia

   en.wikipedia.org/wiki/List_of_measuring_instruments

   pH meter: pH (chemical acidity/basicity of a solution) photometer: illuminance or irradiance planometer: area polarimeter: rotation of polarized light potentiometer: voltage (term is also used to refer to a variable resistor) profilometer: surface roughness protractor: angle psychrometer: humidity pycnometer: fluid density pyranometer: solar ...

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   It's compact and lightweight at 2.6 pounds, and our price trackers tell us it's only dipped $1 lower all year. "I’m obsessed with this vacuum!" gushed a buyer. "It's so lightweight, has GREAT ...

5. pH indicator - Wikipedia

   en.wikipedia.org/wiki/PH_indicator

   A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be determined visually or spectroscopically by changes in absorption and/or emission properties. [1] Hence, a pH indicator is a chemical detector for hydronium ions (H 3 O +) or hydrogen ions (H +) in the ...

6. Read the full indictment: Luigi Mangione charged with murder ...

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   Luigi Mangione charged with additional murder counts on Tuesday in the fatal shooting of UnitedHealthcare CEO Brian Thompson, officials announced.. Mangione, 26, was charged with one count of ...

7. Human composting is rising in popularity as an earth-friendly ...

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   Kimberly Cooley-Reyes, 66, falls into that category. An avid gardener, Cooley-Rees found human composting after her best friend passed away several years ago and had a green burial.