Instruments for Measuring Water Quality
The variety of equipment available for testing the properties of water is enormous, so below is a small selection of some of the most basic, popular devices.
As the name suggests, these are employed to measure the pH of a body of water, and as a result the acidity/alkalinity. They usually consist of a probe that relays data to a meter, which displays the information to the user.
Dissolved Oxygen Meter
A device, usually similar in design to a pH meter, used for measuring the level of dissolved oxygen in a solution, and therefore is often employed when testing water's suitability for sustaining life.
Biological Oxygen Demand (BOD) Meter
Often used in conjunction with the above device, this determines the level of oxygen needed by organisms present within a body of water.
Temperature Measuring Devices
While simple versions of temperature-measuring devices are available, much more complicated and specialised versions are often used, such as devices that take long-term readings and store the results electronically.
Conductivity meters measure the ability of a solution to conduct electricity, which can indicate all kinds of things about the contents or properties present. Conductivity is measured in ohms.
Flow meters are used to take a reading at a specific point in a body of water, measuring the rate of flow at that point, giving information about the rate of movement in general.