Water / Wastewater 33
LeveLine water level loggers offer outstanding performance at a competitive price with a 5 year warranty
The LeveLine range of water level and temperature sensors was launched by Aquaread in 2014. Within the last four years the range has seen huge successes both in the UK and overseas and has been used by both private customers and various governments to provide accurate and reliable data over a number of years.
The range started with an entry level version called the LeveLine-ECO, made from stainless steel and a high-end version simply called ‘LeveLine’ that was made from high quality titanium. In 2016 Aquaread proudly announced that the complete range would be made from titanium, dropping the LeveLine- ECO from the range. A new entry to the range was launched the LeveLine-MINI, a smaller unit designed solely for use with telemetry systems or third party dataloggers.
In 2017 the latest addition to the range was launched. The LeveLine-CTD was introduced, capable of measuring a water level, conductivity, salinity and temperature. In addition the LeveLine-MINI-CTD was also rolled out aimed at the telemetric market.
The current LeveLine range includes the LeveLine, LeveLine-CTD, LeveLine-MINI and LeveLine-MINI-CTD. All units are made from high grade titanium providing maximum corrosion resistance in all applications. In addition each logger is available either as absolute (non-vented) or gauge (vented) depending on user requirements making the range very flexible.
LeveLine and LeveLine-CTD both come with 5 year warranty, thanks to its track record of reliability and offer a 10 year battery life. Batteries can be replaced once they have expired, these are not throw away items. A huge 500,000 data point memory is a standard feature of the LeveLine and LeveLine-CTD; operators can log up to 10 times per second on the LeveLine. This range of instruments is SDI-12/RS 485 compatible and they all have the ability to embed the GPS coordinates of each LeveLine and LeveLine-CTD into the data set when used with the LeveLine GPS meter. Operators can also download data from multiple LeveLine’s onto one LeveLine GPS meter. Despite all of these features, this range is very competitively priced and capable of out-performing many, more costly, water level loggers.
Interchangeable RADAR and ultrasonic transducers and new microwave velocity sensor
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Pulsar’s systems operate world-wide and the latest systems have been built specifically around the sophisticated control, security and communications requirements of the water/wastewater industries. Asset Management, predictive maintenance, TOTEX, EDM, WITS and more have influenced and informed developments in the technology, so that a modern Pulsar controller is much more a pumping station management system than a level measurement device.
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Hundreds of thousands of Pulsar ultrasonic measurement and control devices provide vital enabling technology to control pumping stations in critical control applications. For maybe 95% of water/ wastewater treatment applications, ultrasonic systems remain the best choice. Within water/wastewater, however, RADAR scores where there is a pressurised atmosphere or where there is an atmosphere other than air - for example in the methane-rich environment of a digester, and RADAR is often more stable on a foamy application. Users now have the seamless and straightforward choice of technologies, ultrasonic or RADAR, with the option to switch later if process conditions change.
For EDM schemes, CSO-specific instruments such as Pulsar’s dBi non-contacting ultrasonic level transducers combine accuracy and reliability with ultra-low power consumption. Pulsar’s recent development Microflow-i is a low power non-contacting microwave velocity measurement device that allows flow volumes to be calculated. Low unit cost means that measurement can be more widely deployed to give clarity of network flow profiles, supporting sophisticated management techniques such as Catchment Planning and Water Infrastructure Response.
Water level meter for measuring in narrow spaces
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Solinst’s Model 102 water level meters feature narrow diameter coaxial cable and probes for accurate manual depth to water measurements in tight spaces. The P10 Probe is stainless steel, 3/8” (10 mm) in diameter and features 10 segmented stainless steel weights. Available in lengths up to 300 m (1000 ft), as well as the compact Model 102M mini water level meter in 25 m or 80 ft lengths.
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in water treatment systems Conductivity is the primary measurement of mineral contamination in water and as an on-line measurement it provides inexpensive, reliable monitoring of water quality through the various stages of treatment. Benefits of using a single, wide-range sensor for all stages of water treatment include savings in specification, procurement, installation, start up, training and maintenance. Requirements for instrumentation spare parts are also greatly reduced, because a single model works with all parameters without hardware or configuration changes, greatly improving system simplicity and reliability. A single wide-range UniCond®
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integrated conductivity sensor, from Mettler Toledo can measure
accurately from ultrapure water up to 50,000 µS/cm using its comprehensive automatic internal auto- ranging. This remarkable rangeability covers all measurements of most water treatment systems so the sensor becomes universal, allowing for straightforward specification, documentation, installation, wiring, operation and planning.
Mettler Toledo’s conductivity sensors feature convenient plug-and-measure functionality which greatly reduces the chances of operator error, with on-board memory to maintain sensor identity, calibration data and sensor diagnostics information. Sensors can be calibrated before installation in the process, with no special handling required to prevent operator error. Key information such as measurement parameter, part number, serial number, factory and user calibration data, and diagnostic factors are immediately recognised when a sensor is connected.
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Just like Pulsar’s ultrasonic systems, their smart RADAR transducer family performs initial signal processing within the transducer rather than its associated controller. The controller, which can be any of Pulsar’s well-known range, provides the water-industry specific functionality that has built Pulsar’s reputation and now operates just as well with RADAR measurement as with ultrasonic. RADAR and ultrasonic are now completely interchangeable and retrofittable, so users can switch easily between RADAR and ultrasonic simply by replacing a transducer.
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02.11.18 10:37
www.envirotech-online.com IET November / December 2018
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