Types Of Phmeters | Advantages And Disadvantages

November 2, 2021

Types of Phmeters

A pH meter or pH meter is a scientific instrument that measures the activity of the hydrogen ion in aqueous solutions, indicating its degree of acidity or alkalinity expressed as pH


Test strips

Test Strips pH indicator paper is one that is impregnated with some chemicals that help measure certain concentrations of substances.

PH paper is used mostly in laboratories, since strips are obtained from it so that they are immersed in chemical solutions that will give different shades and colors to the paper depending on the pH level they contain.

Portable pH Meter

Pocket pH meter allows us to mobilize and measure different types of substances in the field.

It consists of a simple electronic amplifier and a pair of electrodes, or alternatively a combination electrode, and some kind of display calibrated in pH units. It usually has a glass electrode and a reference electrode, or a combination electrode. Electrodes, or probes, are inserted into the solution to be tested.

The design of the electrodes is the key part: These are rod structures, usually made of glass, with a bulb containing the sensor at the bottom. The glass pH electrode has a glass bulb specifically designed to be selective to the concentration of hydrogen ions. Upon immersion in the test solution, the hydrogen ions in the test solution are exchanged for other positively charged ions in the glass bulb, creating an electrochemical potential across the bulb. The electronic amplifier detects the electrical potential difference between the two electrodes generated in the measurement and converts the potential difference into pH units.

Benchtop pH Meter

Benchtop pH meters are precision instruments that allow us to determine with higher resolution

The pH meter or potentiometer is a sensor used in the electrochemical method to measure the pH of a solution.

The pH determination consists of measuring the potential that develops through a thin glass membrane that separates two solutions with different proton concentrations. Consequently, the sensitivity and selectivity of glass membranes during pH is well known.

A cell for pH measurement consists of a pair of electrodes, one made of calomel (mercury, mercury chloride) and the other made of glass, immersed in the solution from which we want to measure the pH.

The electrode support wand is made of ordinary glass and is non-conductive, while the sensitive bulb, which is the sensitive end of the electrode, is made up of a polarizable glass (pH sensitive glass).

The bulb is filled with the 0.1M hydrochloric acid solution saturated with silver chloride. The potential difference inside the bulb is constant, because its pH is kept constant (pH 7) so that the potential difference only depends on the pH of the external environment.

The wire that is submerged inside (usually Ag / AgCl) allows this potential to be conducted to an amplifier.

Portable pH Meter Applications

  • Phmeter for Chemical Industry   
  • Phmeter  Chemical Cleaning
  • Phmetro  Catering and Restoration
  • Phmetro  Laboratory
  • Phmetro  Education
  • Phmetro  Laboratory Agroalimentario
  • Phmeter  Clinical Laboratory
  • Phmeter  Water Laboratories
  • Phmeter  Automotive Industry
  • Phmetro  Petrochemicals
  • Phmeter  Biodiesel
  • Phmeter  Power Plants and Renewables
  • Phmetro  Surface Treatments
  • Phmetro  Drinking Waters
  • Phmetro  Wastewater
  • Phmetro  Water Treatment Engineering
  • Phmeter  Environment
  • Phmetro  Pools / Spas
  • Phmeter  Legionella Control and Prevention
  • Phmetro  Facilities Management and Maintenance
  • Phmeter  Agricultural Production
  • Phmetro  Livestock
  • Phmeter  Gamma
  • Phmetro  Frozen
  • Phmetro  Oil
  • Phmetro  Olives
  • Phmetro  Pickles
  • Phmeter  Additives
  • Phmetro  Bottled Water
  • Phmeter  Refreshments
  • Phmetro  Juices
  • Phmetro  Beer
  • Phmetro  Preserves Vegetable
  • Phmeter  Meat Industry
  • Phmeter  Dairy Industry
  • Phmeter  Fishing Industry
  • Phmeter  Feed
Dr. Loony Davis5
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Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

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