How to choose a pH meter for water

How to choose a pH meter for water

pH meter for water is indispensable in checking of environmental quality of water and do research about it. And there are something need to know about it.

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Measurement range

pH meter for water

pH range is from 0 to 14  with 7 being neutral, pH of less than 7 indicate acidity, greater than 7 indicates a base.

Display of pH meter are digital.

Accuracy

Accuracy of meters is generally from ±0.1 pH to ±0.001 pH. For instance, a pH meter with an accuracy of ±0.01 is a better choice than with an accuracy of ±0.1. This depend on your actual applications and needs.

Stability

The stability strongly dependent on the temperature and cleanliness of pH electrode at measuring time.

Electrode/Sensor

I tell you about meter’s parameters. In addition, I will introduce some kind of pH electrodes:

pH electrode made of glass material or plastic by manufacturer.

There are many different types of pH electrode such as:

  • Combination pH sensors (with integrated temperature sensor)
  • Laboratory pH sensors,
  • Process pH sensors,
  • And differential pH sensors.

Calibration

The best pH meter for water which should do calibration every day to ensure the right results. Types of pH standard buffers are: (pH 1.68, 4.01, 7.01, 9.18, 10.01).

pH meter is calibrated by 2 point, 3-point or 5-point to your demand.

Some basic steps of calibration for pH meter:

Firstly calibrate it in pH of 7.01 standard buffer.

After that you can introduce at the pH 4.01 standard buffer (you can also use pH 10.01 buffer or other standard buffers).

Configuration of pH meter

A basic set of meter include: Main meter body, pH electrode  & standard pH calibration solutions like as 4.01; 7.01 and 10.01.

Power source of pH meter is by electric or by battery.

Application of pH meter for water

pH meter is used in many fields from laboratory experimentation to general water quality.

For example of water sources like as inland surface water, ground water, streams, rivers, and lakes, and seas…

How to choose types of pH meter for water

  • Firstly, for measuring pH level at the site directly, you should buy a portable/Handheld pH meter because it is compact and easily to carry on.

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Literature 


Atago 4311 Handheld Digital pH Meter


LaMotte 5-1936-01 pHPLUS Direct Meter

  • Secondly, for measuring pH in the lab, you should buy a benchtop pH meter which is better stability. However, you can also use a portable pH meter instead.

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OAKTON WD-35614-33 Waterproof pH 150 Meter with Probe,


OAKTON PH 700 Benchtop pH Meter and Electrode

  • Thirdly, for measuring continuous pH level outdoor or in industrial process, you should use a online pH transmitter which is fixed on the wall, or on the pipe line…

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  • Lastly, pen pH meters suitable for hydroponics, convenience and cheap price.

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Triplett WQ120 PH/TDS/Conductivity/Salinity Pen


Extech PH110 ExStik pH Meter, Waterproof, Refillable


Extech PH100 Waterproof ExStik pH Meter

This page connect with shops of authorized distributors or manufacturers directly, so you can rest assured when shopping here.

Reference:

Water Quality Meter

LaMotte Water Quality Testing Products

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Hello, I am Rose Thanh, a science and technology engineer and currently an online product marketer. I created this website to share information and do online & affiliate marketing for products that I like. I love my job very much.

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