16 Water/Wastewater New Submersible Level Transmitter Offers High Accuracy and Stability
A new range of submersible hydrostatic level transmitters has been launched by Impress (UK), which can be used in depths of up to 200 metres. The transmitter offers an SDI-12 digital output and an inbuilt high accuracy temperature sensor.
The SDI-12L range of submersible level transmitters uses either a stainless steel silicon-based pressure sensor or a ceramic pressure sensor in marine-bronze. Both versions use piezoresistive technology, which provides long term stability and repeatability of measurements.
The transmitter is ideal for a wide range of applications, including the monitoring of river and reservoir levels; tanks and vessels in process plants; seawater and estuary levels; borehole water levels; Tsunami and tidal monitoring systems; wave height measurement; environmental monitoring; and V-notch weir flow measurement.
The stainless steel version offers a higher resolution of pressure measurement to around 12-13 Bit and has a much lower signal-to-noise ratio, providing a very smooth and accurate method of level measurement. The ceramic pressure sensor version is better suited to marine use, where standard devices may suffer from corrosion. These units are ideal for seawater, estuary and saline applications.
The SDI-12L offers measurement ranges from 0.5mWG up to 200mWG. The output units can easily be adjusted to mmWG, cmWG, inHg and all the standard engineering units required via the SDI-12 interface and command structure. Temperature range of the transmitter is from –20o
C up to +60o C. Accuracy of the inbuilt temperature sensor is less than ±0.1% of full-scale
output. Due to its SDI-12 compatibility, the transmitter can be corrected according to the specific density of the media being measured and local gravity can be set within the device, adding further to the accuracy of the unit.
The SDI-12L is ideal for borehole pump applications. Here, submersible pumps are used to pump water from bottom of the hole to the surface. For the pumps to operate efficiently, they must maintain a level of water above them to prevent them running dry, which can destroy a pump in a short period of time.
The SDI-12L can either be submersed with the borehole pump and attached to the bracketry or retrofitted by lowering the device into the borehole to a known height from the cable distance. The sensor will then output a signal to the surface via the cable, which can then be converted to a level reading. Using a digital process display, this signal can then be used to trigger a relay and turn the pump off if the water level is too low or switch the pump on if the level in the borehole has risen too high.
Reader Reply Card no 53 BOD by Day, Titrate by Night
The PC-BOD/Titrate Duo from Man-Tech (Canada) enables laboratories to prepare and analys e samples for BOD5 then, with a simple change of a rack and probe holder, analyse different samples for pH, conductivity, alkalinity, turbidity and more! BOD by Day, Titrate by Night. With the PC-BOD/Titrate Duo, Man-Tech delivers BOD and Titration in one, a quick return on investment, and rock solid technology. The PC-BOD/Titrate Duo follows 21st edition of Standard Methods, US EPA, and ISO Approved Methods. The PC-BOD/Titrate Duo with AutoMax73 or AutoMax122 is a durable, reliable system, which takes up less bench space than two separate systems. It delivers rapidly generated results that are accurate, precise and that will stand the test of time.
Measure Fat, Oil and Grease
Levels in Wastewater... on-site results in 10-15 minutes!
The PC-BOD Titrate Duo offers the DUO platform, making it simple and easy to switch between configurations. It has a common, dynamic rinse station for both platforms, innovative autorun buttons which simplify
operation and training, automated import and export from/to LIMS, as well as the capability to allow the operator to easily add more samples to the batch while running. The PC-BOD offers automated addition of dilution water, seed and inhibitor, as well as automated rinsing, and a standard YSI probe. It allows quick and easy sample set creation, pre-defined sample sets including blanks, seeds and GGA's, the capability to analyse BOD and CBOD samples in the same batch and automation of 5 and 7-Day BOD analysis methods. The TitraSip™ Multi-parameter System allows automated pipetting, autodilution capabilities for high concentration samples as well as analysis of pH, conductivity, and alkalinity, all from a single sample. It also offers pH/conductivity/alkalinity in 3 minutes or less per sample and a 48,000 step buret drive to ensure accurate, precise titration results. The IntelliRinse™ system ensures system and probes are clean before moving to the next sample.
Reader Reply Card no 54
InfraCal TOG/TPH Analyzers let you quickly and easily:
• analyze produced water on offshore oil platforms
• monitor refinery or industrial plant wastewater effluents
• measure FOG discharge levels into treatment centers
With over 2,000 in operation, InfraCal Analyzers are the worldwide industry standard for on-site measurement of total oil and grease (TOG), total petroleum hydrocarbons (TPH) or Fats, Oils and Grease (FOG) in water.
Don’t wait for off-site lab tests to ensure compliance as fines for discharges above permit requirements can be costly – often more than the price of an InfraCal TOG/TPH Analyzer!
To learn more, visit our web site
www.wilksir.com or call: 203-855-9136 or email:
info@wilksir.com
First Edition of Aquatech India Sets the Standard
The first edition of Aquatech India exceeded all expectations. The show was opened by the Minister of Water Resources of India, who stated that the gathering of international water industry professionals at Aquatech India plays a vital role in finding solutions for the countries water related challenges. Five months before the start of the show, the floor space was already sold out, which forced the organisers to provide extra space for exhibitors in a temporary structure outdoors. With 200 exhibitors filling 10,000 square metres of floor space, a high level conference, the Utility Leaders Forum and other seminars, Aquatech India immediately set the standard for water technology trade events in the region. The next edition of the show will take place in Mumbai from 2 - 4 March 2011. Aquatech India attracted some 9,500 unique visitors, more than 250 conference delegates and 60 high level CEO’s of utility water boards. Next to that, international delegations from China and France came to see the show. A unique mix of municipal as well as industrial water professionals were present and learned about the latest innovations in their field of expertise. The majority of the visitors were from decision making units of their organisations resulting in valuable business conversations on the show floor.
Reader Reply Card no 55
For immediate information on products featured in this issue - please email us today!
leads@aet-pub.com Reader Reply Card no 56
AET
April/May 2010
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