30 Water / Wastewater Do you know what‘s in your water?
Plumb and Play Ozone Analyser with Reagent-less Sensor Design for Low Operating Costs
The new plumb and play OZ80 Ozone Analyser from Electro-Chemical Devices (USA) features a reagent-less design for low operating costs and offers a choice of three factory calibrated measurement ranges designed to help busy process and plant engineers achieve accurate measurement with a simple easy-to-install system that can be up and running in less than 15 minutes.
Unlike conventional analysers that come with multiple components that must be installed and then require fi eld calibration, the OZ80 Analyser is factory assembled and factory calibrated prior to arriving at the plant. All the technician needs to do is mount the panel and connect the drain lines, plug in the power cord and select the outputs on the display as 0 to 2.0 ppm for water disinfection or 0-20.00 pm for oxidation and bleaching operations.
Dual range measurement of both Ozone (O3 ). O3 i::scan ) parameters also is available with the OZ80 Analyser. O3 is a colourless to pale
blue gas that in low concentrations gives off an irritating acidic odour. It is a strong oxidiser, stronger than either chlorine (Cl) or chlorine dioxide (ClO2
reacts quickly and disintegrates into oxygen gas without the formation of harmful disinfection TM
„ four sensors in one „ optical measurement „ highly cost-effective „ in-pipe installation
byproducts (DPB’s) common to chlorine disinfectants that require additional costly treatment. It also increases the amount of oxygen in the water.
O3 is widely used in municipal drinking water and wastewater treatment plants. It is useful at several points in the drinking
water treatment process as an oxidiser for removing metals from well water as well as organics, odours and colour from surface water too. Industrial uses for O3
include food/beverage processing, pulp/paper manufacturing and as a bactericide for industrial
cooling towers used in the electric power generation, oil/gas refi ning and petrochemical production. The OZ80 Analyser features powerful amperometric sensors to detect and monitor O3
www.i-scan.at - Optical Online Water Quality Monitoring
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less designs. These sensors keep the cost of ownership low by not requiring expensive reagents. The O3
OZ80 Analyser’s T80 Transmitter and the O3
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rachael@envirotechpubs.com rate of 0.5 ft/sec, above this fl ow rate, the reading is virtually independent of the fl ow rate.
The OZ80 Analyser’s constant head fl ow control device (CFD) maintains the optimum fl ow rate moving past the sensor for sampling purposes. The CFD’s automatic fl ow control capability eliminates the need for pressure regulators and rotameters, which are required by many other H2
O2 analysers, to reduce system maintenance and lifecycle operating costs. The minimum
fl ow rate required by the CFD is 10 gal/hr, and the maximum fl ow rate is 80 gal/hr with the sample draining at atmospheric pressure.
The OZ80 Analyser is available with an optional sensor auto clean confi guration. The sensor auto clean features a solenoid actuated spray cleaner that provides either a 30 psi process water or air. The spray cleaner removes fi lms from the sensor head, which over time can affect measurement accuracy. There is rarely a need for manual wiping of the sensor head by maintenance technicians with the spray clean confi guration.
Designed with ECD’s T80 Universal Transmitter, the OZ80 Analyser includes a 128-x-64 pixel (2.75-x-1.5-inch) display. The display is black on grey with no backlight or blue on a white background with the LED backlight. The standard confi guration features two 4-20 mA outputs, three alarm relays and MODBUS RTU. The enclosure is rated to IP65 and weatherproof.
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SQ
NON-CONTACT FLOW METER
World-class: The new RADAR FLOW METER for sewage and wastewater sets new standards in monitoring discharge.
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The Self- Cleaning
Analysis System
Bürkert’s (Germany) Type 8905 Online Analysis System supports waterworks in monitoring of the most important water parameters and compliance with all directives. The system gives drinking water treatment specialists an overview of the measured values to allow optimisation of the single treatment steps, therefore contributing to effi cient and safe drinking water production. Now the analysis device can also be cleaned automatically.
9 Non-contact measurement of level and flow velocity
9 Maintenance-free operation 9 No structural work in the water
9 Easy installation and integration in existing systems
9 Mounted outside of the water 9 Water-proof and submergible
The composition of the water sample can contaminate the sensors of Bürkert’s Type 8905 Online Analysis System. This is the case with calcium and iron deposits or algae. Coating formation in the water sample, for example, can adversely affect the turbidity measurement. To ensure consistently good measurements the sensors should therefore be cleaned at regular intervals, based on the quality of the water samples. For this purpose Bürkert developed the Type MZ20 cleaning module, which can be connected as an add-on module upstream of the measurement system for dosing of cleaning solutions.
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The module normally executes the cleaning process on a time-controlled basis. However, the module can also be programmed individually to clean when certain measurement constellations of the connected sensor cubes exist. Based on the changes in the measured values the system tests whether the cleaning was successful and repeats the process, if necessary. Commercially available cleaning liquids are pumped from a storage bottle into the measuring system. The cleaning system carries out all relevant functions such as water sample shut-off, solution dosing and condition signaling via the CANopen-based Bürkert system bus independently and fully automatically.
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IET Annual Buyers’ Guide 2016/17
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sensors are manufactured with a gold cathode, a silver anode and a rugged microporous membrane. Unlike many other analysers, there are no reagents required with the OZ80 Analyser. Its O3
sensor technology and pH measurement are reagent-
sensors are smart sensors with their identity and calibration information stored internally. Communication between the sensor is via MODBUS. The sensors are fl ow sensitive requiring a minimum fl ow
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