46 Water/Wastewater New Applications and Capabilities for Leakwise Oil Leak Monitors
GE Analytical Instruments (USA) recently supplied several major oil companies with its Leakwise Oil-on-Water Monitoring Systems to monitor their large tank farms. Multiple Leakwise ID-223/2000 detectors were installed near tanks to detect tank overfill, hydrocarbon build-up, and oil spills and leakages from pipes, pumps, valves and tank dewatering.
Leakwise ID-223/2000 sensors can detect and monitor oil layer buildup in the range of 0.3-25 mm on water or dry ground. They use wireless radio transmitters or GSM cellular communication for sending status and alarm signals to a receiver located in a remote control room. The receiver, which can handle multiple transmitters, is connected via a modbus protocol to a Leakwise digital controller which has Modbus output to the customer’s SCADA. The controller can relay outputs for alarm and control, as well as Cellular GSM transmission of SMS messages to tank farm managers, operators, and fire fighters.
Offshore, the wireless Leakwise ID-227WL Oil-on-Water Sensor is monitoring desalination plant intakes, oil ports, and rivers to detect oil spills from boats or local tank farms. The Leakwise ID-227WL is mounted on a wave rider buoy with solar power and has either a powerful point-to-point radio transmitter that can send signals as far as 20 KM, or a cellular GSM transmission of alarms and status reports to multiple mobile phone numbers.
Reader Reply Card No. 151
Digital Sensors for Measuring Water Quality New Low-Cost Water Radar
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) announces the DIGISENS range! Four digital sensors are offered: pH/redox/T°C ; Conductivity /Salinity/TDS ; Turbidity and Dissolved Oxygen operating on a principle of digital Modbus communication (RS485 and SDI12).
Séverine Vary, PONSEL’s product manager, explains: “We developed those sensors for field applications in order to integrate them to our portative device, the Odeon. Moreover, the protocols Modbus RS485/SDI12 enable compatibilities with dataloggers/transmisors as well as terminals equipped with suitable digital outputs (RS485 or SDI12). All calibration and traceability data are registered in the sensor which makes it clever and not dependent over a fixed exploitation system. Sensors are not only used for occasional measurement, but also for semi fixed and fixed condition in warning station (controls of upstream and downstream releases in WWTP), in the industry (regulation neutralisation), in aquaculture (monitoring of farms oxygenation) or even in integration on instrumented buoys.”
Reader Reply Card No. 152
The Vegapuls WL 61 level sensor from Vega (Germany) is primarily for water and sewage level measurement. Radar technology offers considerable advantages over ultrasonic devices; measurement is independent of temperature, high winds, fog or rain. New generation, high sensitivity radar electronics ensure security of measurement, even under turbulent, challenging surface conditions.A radar sensor offers higher accuracy - where in open channel flow, for example, the sun shining on ultrasonic transducers can create large temperature errors -especially when measured data is factored through flow equations. The focused radar signal means it can be deployed into crowded pumping chambers and the sealed cable and robust housing provide a high protection rating of IP 66/68 (1 bar). The variety of mounting options easily mechanically integrate into existing applications, and units can directly connect to existing field-bus systems or loop-powered from a signal conditioning instrument for pump control. Integrated sensor linearization curves can be programmed in using free FDT/DTM software, allowing direct output of flow rate in open channels. The new Vegapuls WL 61 was conceived and developed to offer a real alternative to ‘ultrasonics’in the water industry, both technically and commercially.
Reader Reply Card No. 153
Tintometer®
-Group
Water Analysis made easy COD VARIO
COD Measurement
ST-COD sealed tubes ready for use
Suppression of chloride interference up to 1000 mg/l (LR & MR) up to 10000 mg/l (HR)
3 ranges - 1 instrument: Low range: 0 - 150 mg/l, meets ISO 15705:2002 Middle range: 0 - 1500 mg/l, meets ISO 15705:2002 High range: 0 - 15000 mg/l
BOD Measurement System
Accurate and direct reading of BOD values in mg/l O2 User-selectable time span from 1 to 28 days Free individual programming of each of the six samples
® Reader Reply Card No. 156
Interested in Water Quality, Data Logging and Telemetry?
Did you know that Aquaread (UK) now has the ability to integrate their multiparameter Aquaprobe or their cutting edge Optical DO AquaPlus probe, with any data logger or on-line telemetry device?
Using their clever BlackBox product released late last year, Aquaread probes can communicate with various data logging or telemetric devices. With a choice of industry standard digital and analogue interfaces (SDI- 12 or Modbus Digital options and 4-20mA or variable voltage analogue options), the BlackBox offers a versatile and cost effective data collection solution.
The BlackBox features an integral barometric pressure sensor for automatic depth and DO correction and can output Depth, Turbidity, pH, ORP, Conductivity, Resistivity, DO, TDS, Salinity, SSG, Temperature and Barometric pressure on an SDI-12 or Modbus (RS485) Digital Interface. Low current consumption, a wide operating voltage range and a rugged aluminium case make the BlackBox particularly suitable for long term unattended deployment.
Already have water quality probes on a telemetric network? The BlackBox and Aquaprobe can replace old worn out and expensive probes and provide a more cost effective solution. Integration is simple and will cause no downtime to your telemetric network.
Reader Reply Card No. 155
High Quality Bladder Pumps
Solinst (Canada) Bladder Pumps are ideal for numerous groundwater sampling applications, down to 150 m (500 ft). The bladder prevents any air or water contact during operation; making pumps ideal for VOC sampling. Stainless steel pumps are also excellent for low flow sampling at 100 ml/min or less. Inexpensive PVC Bladder Pumps are useful for metals analysis, and projects with highly corrosive liquids present.
Reader Reply Card No. 154
IET May / June 2011
www.envirotech-online.com
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