Drinking Water Turbidimeters – EPA 180.1 compliant and ISO 7027 compliant

In this post: US EPA vs EU drinking water turbidimeters, US EPA 180.1 Turbidimeters, ISO 7027 Turbidimeters Turbidity measurement has long been required for drinking water and potable water treatment and supply. Online turbidity instruments are used in water treatment process and distribution systems globally to measure turbidity or quantify the "cloudiness" or insoluble matter present in the drinking water. Many organic and inorganic items such as sand, silt, solids, precipitates, spores and bacteria found in drinking water contribute to the water cloudiness or turbidity. Turbidimeters are the instruments we use to help operators and treatment facilities quickly detect microorganisms and certain bacteria that could be harmful to the population even in low concentrations. This turbidity measurement instrument has to be accurate, sensitive and reliable to ensure that the drinking water is contaminant free. US EPA vs EU Drinking Water Standards The US EPA has long required turbidimeters and turbidity monitoring as found in the National Primary Drinking Water Regulations and has defined the standard US EPA Method 180.1 Determination of Turbidity by Nephelometry. NTU is the measurement unit used for EPA Method 180.1 and is defined as Nephelometric Turbidity Unit. This 180.1 white light turbidity method measures scattered white light at 90 degrees from the incident light beam. Online US EPA 180.1 process turbidimeters use these NTU measurement units. The EU Drinking Water Directive has identified turbidity measurement as one of several fixed monitoring parameters required for all water that is intended for human consumption. The European drinking water protocol used for turbidimeters is ISO 7027. This method uses the unit FNU which stands for Formazin Nephelometric Unit. In contrast to the US EPA method 180.1, the ISO 7027 method measures in FNU with an infrared light source. The infrared light source and FNU unit is widely used for turbidity instruments globally and often found as the unit for submersible turbidimeters. Online ISO 7027 process turbidimeters also are found with these FNU units as the primary units. Turbidimeters for US EPA Method / US EPA 180.1 The MicroTOL Turbidimeters from HF Scientific offers US EPA 180.1 method white light turbidity…

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Water Treatment Plant Instruments from Nivelco – Potable Water Production
Water Treatment Process

Water Treatment Plant Instruments from Nivelco – Potable Water Production

Nivelco Process Instruments for Water Treatment Plants - Potable Water Production Get A Quick Quote >> Nivelco and MCE Process can provide all your instrumentation needs for production wells, purification, treatment, and distribution system. PRODUCTION WELLS The production wells are drilled in ground layers rich in water, the pumps are lowered into the wells to pump the raw water to the central water treatment facilities. Measuring tasks: Continuous level measurement of the well Temperature measurement of the water Hydrostatic pressure (water level) of the production well Flow of the produced water Dry-run protection of the pumps RECOMMENDED INSTRUMENTS Hydrostatic level transmitters that combine level and temperature measurement: the NIVOPRESS N transmitter family. Piezoresistive pressure transmitters: NIVOPRESS NZK types Water input measurement: ISOMAG electro-magnetic flow meters WATER TREATMENT PLANT The raw water pumped from the production wells contains different organic and inorganic materials. These materials have to be removed from the water. Removal is done either by mechanical filters or by adding coagulant materials to the water to help precipitate the contaminating materials. The resulting slurry is separated in settling tanks. The clean water is often passed through sand or other final filtration stages. RECOMMENDED INSTRUMENTS Pressure measurement with  NIPRESS type pressure transmitters Level measurement with EchoTREK ultrasonic level transmitters pH measurement of the clean water with AnaCONT analytical instruments Low/high level switching with NIVOSWITCH or NIVOMAG level switches Turbidity measurement with 28053 US EPA 180.1 Turbidimeter Turbidity measurement with 28052 ISO 7027 Turbidimeter WATER DISTRIBUTION SYSTEM To move water out to the distribution system and to the customers, the pressure in the system has to be increased. This is done by booster pumps, water towers or air charged pressure vessels with compressed-air pumps. RECOMMENDED INSTRUMENTS Pressure control at the compressed-air pumps with  NIPRESS pressure transmitters and UNICONT controllers Water level control at the compressed-air pumps with  NIVOCAP level transmitters and UNICONT controllers Water level measurement in the reservoir or watertower with  EasyTREK ultrasonic level transmitters from either the top or the bottom of the water tower with NIVOPRESS D type hydrostatic level transmitters

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