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How To Buy The Right pH Meter – Guide

Whether you have to follow a low-acid diet because of a medical condition or you simply want to stay as healthy as possible and consume an alkaline diet, knowing the pH level of the foods you consume is a great idea.

The easiest way to do that is to research and memorize the pH levels of common foods, which you can find online. But some foods have a wide range of pH levels, so how can you know where on the pH scale your food lies?

The answer is simple: Invest in a pH meter.

How To Buy The Right pH Meter?

A pH meter can help you determine the pH level of any food and drink you consume with very precise accuracy. Most of them are effortless to use and can help you follow a low-acid, mostly alkaline diet.

Owning a pH level can also help you if you enjoy canning and storing foods for more extended periods, which requires a specific pH level to prevent the foods from spoiling. With all of these benefits, there’s no reason not to get a pH meter.

If you’ve decided to buy a pH meter, now you have to think about which type is the best for you. This is important since some pH meters work better for liquids while others are better for solid foods.

Others are also better for more scientific research than testing foods at home, so you have to make sure what it is better for before buying it, as some may be toxic. There are also many other differences depending on what you’re looking for.

>Measuring pH levels isn’t only for science and academic purposes. These days, many people buy pH meters to test the acidity of the foods they consume and the liquids they drinks. In addition, it is often done to ensure that you’re consuming a primarily alkaline diet filled with low-acid foods. Here are the best pH meters on the market.

How does a pH meter work?

A pH meter consists of three major parts: an internal electrode, a reference electrode, and a high input impedance meter. These three components work together to determine the pH level of the food you insert the probe in by comparing the pH level to the reference electrode and giving you the result.

It measures the balance between different ions present in the food or solution, thus determining the pH level, which generally ranges from 1 to 14.

Without going too much into detail, the pH level breakdown looks like this:

  • Neutral pH level = 7
  • Acidic pH level < 7
  • Basic pH level > 7

If you’re following a low-acid, mostly alkaline diet, you should stick to foods with pH levels above 7 since those are the least harmful to your digestive system. It’s also important to note that some foods may have a low pH level but still be alkaline-forming once digested, though.

Those are mostly fresh vegetables, such as tomatoes, onions, and even fruits like lemon. Because of that, remember that there’s a lot more to a low-acid diet than just the pH levels of the foods you consume.

What types of pH meters can you buy?

Which type of pH meter you choose depends greatly on what you want to use it for. This is because there are many different kinds available on the market, depending on what types of pH levels you want to check.

For example, if you’ll want to use your pH meter to measure the pH levels of liquids, you might want to choose as it’s the safest choice. That way, you’ll be able to safely emerge your equipment in water without worrying about it breaking down.

You can also buy pH meters that are easier to move around than others, so again, it all depends on your needs. If you’re looking for something to check pH levels and acidity with at home, you may want to choose slightly cheaper equipment as it doesn’t need to be highly accurate.

On the other hand, if you’re looking for something more specific, you can choose pH meters that allow you to calibrate the tool and get more specific results. However, this may increase the price, so only do so if absolutely necessary.

>Measuring pH levels isn’t only for science and academic purposes. These days, many people buy pH meters to test the acidity of the foods they consume and the liquids they drinks. In addition, it is often done to ensure that you’re consuming a primarily alkaline diet filled with low-acid foods. Here are the best pH meters on the market.

The most common ones are pen-sized pH meters that can be easily moved around and stored, so they’re best for home testing. They’re also relatively accurate, so you won’t lose precision. These types of pH meters are slightly cheaper than bigger, more advanced versions, so you can save some money while you’re at it.

If you’re not looking for something too expensive or if you just want to try measuring pH levels out, you can start with pH test strips. These are less expensive than pH meters and simpler to use as they require no calibration whatsoever.

On the other hand, pH test strips are slightly less accurate and can solely be used for liquids, as it needs to be applied to the strip, which is hard to do with food.

How to pick the right pH meter?

There are many things you should consider before buying a pH meter. From accuracy to price, there is an abundance of devices measuring pH levels these days. So, what exactly are the things you should be looking out for?


Some pH meters are more accurate than others. If you’re looking for equipment for educational or professional research, you may want to opt for more accurate ones. For example, it’s best to aim for a pH meter that gives you results with a 0.1 accuracy as opposed to 1.

That way, you can report your findings in a more detailed way, which is essential in a scientific environment. On the other hand, if you’re looking for a pH meter for home use, you can choose lower accuracy as it doesn’t make a huge difference on a low-acid diet.


Ph readings are extremely affected by temperature. As a result, you either have to use your pH meter at the same temperature as the food has or use a meter that adjusts its temperature automatically. These are more expensive, but they give you a more accurate reading.

This can be beneficial if you’re doing some academic research that requires quick and accurate results. The pH meters that adjust the temperature automatically are slightly more expensive, so it’s important to decide which features you truly need.


Calibration of the pH meter is achieved by immersing the electrode in a buffer solution that has either a pH level of 4, 7, or 10 (often color-coded red, yellow, and blue). This allows your pH meter to detect the acidity accurately, as it will enable your tool to have a broader spectrum of measurement.

For example, if you’re using your pH meter to measure the acidity of foods, you have to use a buffer with a pH of 4 and 7 to ensure that it will detect the ions present in the foods or liquids. On the bright side, the newest pH meters calibrate themselves automatically, which increases their accuracy even more.


Some pH meters are attached to the table, so they’re much harder to transport while maintaining accuracy and calibration. Because of that, they’re best suited for research labs and other stationary places.

If you’re looking for a pH meter that will allow you to measure the acidity of foods and liquids in most places you go, make sure to go for portable meters.

These days, they are almost as accurate as the scientific ones that can’t be moved easily. As a result, you won’t lose any precision, but you’ll still be able to travel with it.

Data storage

If you’re looking for a pH meter because you have to follow a low-acid diet due to a medical condition, you may want to look for one that has data storage. That way, you can store the pH levels and name them to identify specific foods items that you consume the most, such as tomatoes, cucumbers, or spinach.

It will also allow you not to measure the same thing twice and avoid wasting time and simply look it up on the device.


Depending on the things you’ll be using your pH meter for, you might want to consider which electrode you want to choose. For example, bulb electrodes shouldn’t be used for foods since they can burst, contaminating the food and leading to poisoning and other problems.

Don’t know what to drink? We made a list of more than 20 most and least acidic juices and 20+ alcoholic drinks ranked by acidity levels.

So these should only be used in research environments where you won’t be ingesting anything you test. If you’re looking for a pH meter for home use, though, choose ones with a sharper tip since it will allow you to insert the electrode into the food or liquid without any problem or damage.

It’s also important not to store the electrode dry as it will stop working properly. Instead, it should be stored in a buffer solution that keeps it working and protects it from damage.

It’s also worth noting that as a rule of thumb, one electrode will last you for approximately one to two years. After that, it will lose its accuracy and slowly stop working, so it will need to be replaced, regardless of what kind you’re using.

Purchasing a pH meter — especially for the first time — comes with many questions and challenges. But if you take a look at some of these most important concerns and worries, you’ll be able to determine which type of pH meter is the best for your needs.

That way, you’ll be able to follow a low-acid diet more carefully and consume mostly alkaline foods.