40 Water/Wastewater
Inline Control of Cleaner Concentration and Rinsing Baths Makes Cleaning Processes Efficient and Reliable
Depending on cleanliness requirements, it is possible to achieve clean parts and surfaces with less effort. Regardless of whether the cleaning process is simple or challenging, the efficiency of the process is always important. This includes the relation of input and output, which means the one should minimise usage of resources needed for parts and surface cleaning whilst meeting the required cleanliness. Control variables are, amongst others, the cleaning product or a change of the bath.
Apart from using a cleaning product according to the requirements, adding an accurate quantity of cleaner is very important for the bath’s reconditioning and maintenance. Over- or under-dosage should be avoided as much as possible for cost and quality reasons.
Continuous accumulation of remaining liquids in cleaning and rinsing baths reduces the product quality, so that the baths have to be reconditioned regularly. However, the frequency of bath changes should be efficient. On the one hand, if a bath is changed too early, it will cause an over-consumption for cleaning agents, energy, fresh water and wastewater. On the other hand, if a bath is changed too late, the quality will be reduced.
In order to ensure that the cleaning process is reliable and economical, it is recommended to use the “LiquiSonic“ inline analyser manufactured
by SensoTech (Germany). The system’s sensor measures the cleaner concentration permanently and directly in the process, so that the values will not fall below or exceed predefined limits. When using the LiquiSonic system, it enables the user to control the change of rinsing baths in a targeted way. Therefore, bath changes passed too early or too late will be excluded.
The concentration measurement is based on the sonic velocity measurement providing fast and precise measured values. The LiquiSonic sensor works maintenance-free and is completely made of stainless steel. The system’s controller manages and visualises the measuring data. With connection to process control systems, it allows the end user to integrate the process control into the automatic control.
Reader Reply Card No. Experienced Development and Manufacturing of Water Quality Sensors
With more than 50 years of experience in the development and the manufacturing of physicochemical sensors applied to the control of water quality, Ponsel (France) is an experienced member of the water analysis world. Recently, a new chapter in the story begins with the launching of the new numerical inductive conductivity sensor. Ponsel would like to remind people that their range is offering solutions for: pH/redox/T°C ; Conductivity /Salinity/T°C ; Turbidity (nephelometry/T°C) and dissolved Oxygen (optical)/ T°C. All the sensors operate on a principle of digital Modbus communication (RS485 and SDI12).
Séverine VARY, PONSEL’s product manager, explains: “We are now more and more successful with the digital sensors which provide a very flexible solution. The demand for inductive conductivity came from customers integrating our existing range and looking for a reliable solution for conductivity measurement in hard solutions. The toroidal technology allows letting the sensor for a long period on the field, with no maintenance”.
How can they explain this success? Stanislas Rault, CEO of Aqualabo Group, gave more info: “first of all, we have a great Research and Development team, working hard to develop state of the art sensors; Then, the quality of our production makes our customers and resellers very confident about us; And finally, we made the strategic decision to work with open communication protocol that is very well appreciated by our partners. We are very impressed by all nice solutions developed by our customers (wireless, floating systems, etc…) and we support them because I am convinced these are the solutions of the future”.
Lovibond® Tintometer®
Water Testing Group Reader Reply Card No. Microbiological Testing Equipment Electrochemistry made easy Multi-
Parameter pH/Redox,
Meters that you need pH-meter
SD 300 pH Good Laboratory Practice (GLP-features)
PC interface for data download (USB / serial or analog)
Automatic buffer detection for calibration High resolution (0.001 pH / 0.1 mV) Data logger / alarm function (min./max.) Automatic temperature compensation Water resistant (IP 67)
www.lovibond.com Reader Reply Card No. Reader Reply Card No. 208 IET September / October 2012
www.envirotech-online.com 207
SD 150 All in one RS 232 / USB
Large digital display Real time data logger Protective casing
Conductivity/TDS, Dissolved Oxygen, Temperature (°C/°F)
The Tintometer Group of Companies (Germany), the home of the Lovibond brand, launches the Microbiological Testing Equipment range, presenting its solutions for indicator organism tests for TVC (Total Viable Count),
E.coli/Coliforms and Pseudomonas. The new Lovibond range is intended to monitor microorganisms – also known as microbes - in the field and is suitable for use by non-technical, semi- technical and professional members of the water analysis team.
This new range also includes an early warning indicative test to detect the pathogenic Legionella bacterium common in many environments, specifically air-conditioning units, cooling towers, domestic water systems and spas. The test detects Legionellapneumophilliaserogroup 1, the most common causative agent of Legionnaires disease in humans, and provides a rapid indication of Legionella presence for further confirmation with laboratory culture tests.
Microbes of various types are found naturally in many water sources. They can be advantageous in some processes. Some, however, can cause disease in both the animal and plant kingdoms. When present in water systems, they can reduce plant and equipment life, potentially affecting the health and safety of operatives and members of the
public.The diversity of the microbes that can affect the water systems is vast and, in the majority of cases, the test to determine which microbial species is the causative agent for disease or infection is too complex to be performed on-site.
It is therefore accepted that indicator organisms can be used in situ to monitor the microbiological trends within a water system: using them as the trigger for changing biocide dosing and further investigative
work.The most commonly used indicator organism tests are TVC (to indicate the general number of microbes in the system),
E.Coli/Coliforms(to indicate any faecal contamination) and Pseudomonas (to indicate any non-faecal contamination).
What about the next projects for Ponsel? “With the acquisition of Perax by Aqualabo group, we are able to provide complete and turnkey monitoring solutions. We also develop new products: calibration of the probe with a smart phone, new parameters, we keep our eyes open on the new technologies and we develop innovative solutions”.
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QUALITY Made in GERMANY
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