Water/Wastewater
Analyser with Intelligent Sensor Technology Optimises Water Filter Backwash Monitoring
Engineers in charge of drinking water treatment plants will want to learn more about the precise, low-maintenance Triton TR8 Turbidity Analyser from Electro-Chemical Devices (USA), ideal for monitoring turbidity in filter backwashing systems to optimise plant efficiency.
Filter backwashing is a critical part of the drinking water production process. During backwashing, water flow is reversed and increased in order to flush out debris and particles. Turbidity is used to monitor the progress of the cleaning, and when the turbidity returns to a value near the turbidity of the clear well water the backwash cycle is stopped. Backwashing cleans the filter to preserve water quality and also extends the life of the filter; however, backwashing too frequently can lead to degraded filter performance. Accurately measuring the turbidity of the water coming out of the filter is the best way to determine when backwashing should occur, optimising drinking water plant performance and minimising operating costs.
The Triton TR8 Clear Water Sensor is ideal for all phases of drinking water processing including filter backwash. The highly accurate Triton TR8 TA operates over wide measurement range with output available in multiple units: 0.000 to 9999 FNU, or 0.00 to 3000 ppm, or 0.0 to 3.0 g/l, or 0 to 20 percent. The TR8 TA sensor features an error rate of less than 5 percent of reading with repeatability greater than 1% percent of reading.
The Triton TR8’s sensor features a unique multi- path optical assembly. The first pathway is inside the sensor to a reference detector that compensates for changes in the LED light source caused by ageing or other variables. The second pathway has a short path length through the sample, which is best for high concentration measurements. The third pathway has a longer path length, which is best for lower concentrations.
The Triton TR8 utilises a highly intelligent microprocessor-based design. Its sensor electronics constantly adjusts suspended solids and turbidity signal readings versus the reference detector for superior measurement accuracy. A built-in digital filter helps to suppress potentially interfering signals while self-monitoring diagnostics assure high reliability.
The Triton TR8’s sensor assembly relies on a long- life near infrared LED light source (880 nm), and the 90-degree scattered light method in accordance with ISO 7027 / EN 27027. The sensor is factory calibrated in formazine, FNU (Formazine Nephelometric Units), and is plug-and-play ready for applications. Two non-volatile memory banks are also available onboard to store user-initiated calibration data.
Featuring an inclined face that is oriented into the liquid flow for optimum self-cleaning, the rugged Triton TR8’s sensor assembly greatly reduces plant maintenance requirements to the occasional manual sensor swiping with a soft cloth. An optional automated mechanical wiper also is available for heavy-duty service environments or for difficult-to-reach sensor locations.
The Triton TR8’s sensor was developed for rugged water treatment environments, designed to operate at ambient temperatures from -5 to 50°C (20-120°F). It withstands pressures up to a maximum of 6 bar at 25°C and 1 bar at 50°C.
The TR8’s transmitter digitally communicates with the turbidity sensor and provides a 4-20 mA output and alarm relay. The TR8’s controller features ECD’s multi-bus architecture, with up to 2 outputs and 4 SPDT relays. It includes a configurable display and HART protocol communication is available as well. The turbidity sensor can be located up to 200 m away from the controller.
Reader Reply Card No. 44 Reader Reply Card No. 45 Rapid Test Catalogue
The new rapid test catalogue from MACHEREY-NAGEL (Germany) is available. On 162 pages you can find all necessary details about our broad product range for water analysis.
For the qualitative and quantitative analysis of ions in solutions, MACHEREY-NAGEL test papers and test strips provide quick and easy screening methods for water, environmental, agricultural, industrial and laboratory monitoring.
For more detailed analysis with more sensitive measuring ranges, our colorimetric and titrimetric VISOCOLOR® test kits and our photometrical NANOCOLOR® products are the ideal choice and ensure uncomplicated analytics. Our product portfolio is completed by rapid tests for microbiological diagnostics. The clear colour codes within the catalogue make sure that all products are found quickly and easily. Extensive information about chemical specifications and applications help you to find the best test kit for your requirements.
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Compact Photometer PF-3 – New Addition to the Photometer Family
The new compact photometer PF-3 is the youngest member of theMACHEREY-NAGEL (Germany) photometer family. The instrument is the logical addition to our product portfolio and perfectly fits our tradition of reliability, user friendliness and innovation.
As the PF-3 will be equipped with three different wavelengths, it will be available in multiple versions. The first one will comprise the classic swimming pool parameters (chlorine, pH, cyanuric acid, total alkalinity). In the near future, more versions will come to market, enabling additional applications in different areas and industries. All instruments will be able to read both our proven VISOCOLOR ECO® tests as well as our high-end NANOCOLOR® tube tests.
The PF-3 guarantees a high degree of measurement safety and reliability. To generate highest precision, we have equipped the PF-3’s optics with especially selected LEDs and premium interference filters. Our unique “Open-Slot” technology allows you to measure without cuvette slot cover, thus underlining the high technical standard of the instrument. In consequence, all users experience easy and intuitive use paired with high result safety.
For the PF-3, similarly to all other MACHEREY-NAGEL instruments, not only measurement accuracy but also easy user guidance is a top priority. Due to the back-lit graphic display and the intuitive menu structure, working with the PF-3 is a breeze. The user interface relies on context-sensitive display icons, which are accessed via 4 buttons underneath the screen. Thus, the instrument features an especially easy, clear and language independent user guidance, which still provides a complete menu structure.
Any adequate measuring device needs to display the results in the respective unit, to increase measurement safety. The PF-3 goes the extra mile, as it enables you to choose from a variety of units per parameter, thus saving time and effort for needless conversions.
With the “0-Set function”, you can optionally save the zero measurement for our VISOCOLOR ECO® tests within the instrument, thus significantly saving time when performing multiple measurements from the same sample.
As a compact and handy instrument, the PF-3 is mainly intended for mobile use and consequently it is adequately robust. The instrument is well protected even against external influences as it features a glass fibre reinforced housing and shock resistant optics. Obviously, the instrument is water and dust proof according to IP 68 and thus enables reliable performance even under the worst conditions.
The variable power supply options guarantee safe and constant measurements in any situation and put the user at ease. Next to using (re-chargeable) batteries, the instrument can be run directly via a USB-cable. Moreover, an optional accu-pack that is charged directly via the USB-port adds another dimension of flexibility for the user.
In addition to multiple power supply options, the USB-port offers the possibility to transfer data to a computer in a modern and intuitive way. The memory of the instrument can store up to 50 measurements, even increasing the PF-3’s in-field capabilities. To heighten user friendliness and comfort, MACHEREY- NAGEL provides an extensive data export software free of charge with every instrument. Therefore, data management becomes convenient, easy and efficient.
One of the PF-3’s most special features is the modular test selection. This option allows users to afterwards add all parameters to the instrument which can be measured given the version’s wavelength – irrespective of the initially pre-programmed tests. This function will be available quickly and easily via the internet. Thus, we already cater to our customers’ future needs enabling them to benefit from all the options of our system without incurring unnecessary costs.
The new PF-3 from MACHEREY-NAGEL is the perfect photometer for specific applications directly at the point of interest, process controls or mobile analytics. 43
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www.envirotech-online.com AET Annual Buyers’ Guide 2013
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