Overview of Instrument Directory

Measuring and testing the quality of water can be a very precise science but it is important to ensure that you are testing a specific body of water for the correct properties for the situation that you are working in. You could potentially spend thousands of pounds in time and equipment testing a body of water for a certain property when, in reality, potential problems may only appear when testing for other properties.There are a large number of ways that you can test a body of water and there exist a wide variety of properties that you may or may not need to test for when considering the overall suitability or quality of a specific body of water.

We have tried to cover some of the more common tests below so that we don't overload you with a large amount of information in one go. However, please note that while these are common things to test in a body of water, you may have to consider completely different properties in a less ordinary situation.

Acidity (pH)

The pH of a solution is a measure of how acidic or alkaline that solution is. While it is often thought of that a body of acidic water is extremely dangerous, it's important to note that a highly alkaline solution can be equally dangerous. There are a variety of meters and devices available that check the pH of a liquid, from litmus paper to highly sophisticated digital devices.

Dissolved Oxygen

The amount of oxygen that is present in a body of water is a fairly good measure of the ability for that water to support organisms living in that water. In the case of super-saturation, there can be a large concentration of oxygen in a small amount of water which can be dangerous to organisms living in that solution. Similarly, too little oxygen is also a good indicator that this water is dangerous to any organisms that are living in it. There are a wide number of devices available that will measure the oxygen concentration in a sample of water which will help to determine whether it is safe or harmful for organisms that live in, or near to, a body of water.


Turbidity can often be thought of merely as the 'cloudiness' of a body of water. More technically, the turbidity is a measure of the suspended solids or particles that are present in a body of water, as these are what make the water cloudy. By measuring the turbidity of a body of water, you can test to see how many particles and solids are dissolved in a body of water and this can often lead to further tests to find out exactly which particles are polluting a body of water and whether these particles are dangerous or natural.