Turbidity meters are instruments used to measure the turbidity of a liquid, which is a measure of the amount of suspended particles in the liquid. In the context of monitoring drinking water, turbidity meters are used to measure the clarity of the water, as well as to detect the presence of any particles that may be harmful to human health.
Turbidity is measured in units of NTU (Nephelometric Turbidity Units) or FTU (Formazin Turbidity Units). The lower the turbidity reading, the clearer the water. High turbidity can indicate the presence of particles such as dirt, sediment, or microorganisms, which can be harmful to human health.
Turbidity meters come in a variety of forms, but most use a light source and a detector to measure the amount of light scattered by the particles in the water. The more particles in the water, the more light that is scattered, and the higher the turbidity reading. There are two main types of turbidity meters: those that use infrared light, and those that use visible light. Infrared-based meters are more sensitive and can detect smaller particles, while visible-light meters are less expensive and easier to use.
Turbidity meters are commonly used in drinking water treatment plants to monitor the effectiveness of the treatment process and to ensure that the finished water meets drinking water standards. They are also used in the field to monitor the quality of raw water sources and to detect any potential issues that may affect the treatment process. Additionally, turbidity meters are used in monitoring environmental water systems and potable water networks, to detect any potential issues that may affect the quality of the water supply.
Drinking water should have a low turbidity, typically less than 1 NTU and certainty below 5 NTU according to the World Health Organisation.
Turbidity meters are useful tools for monitoring the clarity and quality of drinking water. They can detect the presence of particles that may be harmful to human health, and are commonly used in drinking water treatment plants and for monitoring environmental water systems and potable water networks