Wallace & Tiernan® Measuring Systems

Disinfection and the maintenance of low residual levels in water distribution systems is becoming more and more demanding with the requirement for greater accuracy and increased reliability.


As pioneers of the continuous amperometric measurement of chlorine residuals in water, the range of Wallace & Tiernan® Products has continued to develop and expand its offering of on-line measuring systems to include other oxidants, pH, Redox, Turbidity and Dissolved Oxygen. This range includes the new SFC Single Function Controller, launched August 2008, and the HydraClam® Water Quality Monitor, an innovative purpose-built system developed in conjunction with Salamander Limited, for monitoring the quality of mains water - now available with remote communications.

  

SFC Single Function Controller ** NEW **

 

The SFC is a new single measurement unit that compliments our current analyser & controller offering. The SFC is available as a single measurement unit with or without optional control functionality. The SFC is also available as a flow proportional controller or a compound loop controller. The instrument is ideally suited for a wide range of analytical and control solutions in the following main applications;

 

  •  Potable water
  •  Industrial process water
  •  Swimming pool water
  •  Wastewater

Benefits include;

  •  Accurate measurement and control in a single instrument
  •  All currently available measurement sensors can be utilized with the SFC
  •  The same look and easy operation as offered in the MFC instrument
  •  Robust and fault-tolerant design
  •  SD card slot for extended data collection and convenient storage of the    configuration
  •  Integrated bus connectivity and integrated data management for long term data logging with data  export option to spreadsheet software

To learn more about our new SFC Controller, visit our main website or view this presentation http://www.brainshark.com/siemenswater/sfc

 

For Literature please click here

HydraClam® Water Quality Monitor

Continuous water quality monitoring via hydrants

The HydraClam® Water Quality Monitor is a purpose-built system for the online monitoring of water quality in the distribution system. It measures four key water quality parameters: turbidity (from 0.1 to 10 NTU), pressure (0 to 145 PSI), conductivity (0 to 2500 µS) and temperature (32 to 86°F). The unit is used for targeted water monitoring within identified problem areas or as a fixed-place monitor.

Made of lightweight corrosion-resistant aluminum, the purpose-built HydraClam device is easy to install. The unit can be fitted underground to certain European hydrants. Alternatively, a mounting adapter can be used to truncate the main for hydrants in other countries. This low profile installation is less susceptible to tampering and provides increased security. For additional water supply safeguards, an internal non-return valve allows water to only flow out of the unit and not in. The fire department can easily remove and replace the device from fitted hydrants.

To ensure that a “fresh” water sample is analyzed, the onboard controller purges the system of water into the hydrant chamber before taking measurements. The data is then stored on the internal data logger from which it is downloaded to a handheld PDA. Up to 8,760 time and date recordings can be stored within a non-volatile Flash memory for all four measurement criteria. The battery-operated unit is readily transportable and requires no specialist skills to install or operate.

The Hydraclam® water quality monitor is also available with remote communications. The unit fits directly onto standard water hydrants with an adjustable aerial that is fitted just below the chamber lid. Data is recorded internally and is transmitted via GPRS / GSM technology to a central data base which can be accessed via a secure web based interface from any computer connected to the internet. The frequency of the update is typically 4 times per day. Data can also be accessed by direct connection to a Palm® PDA or a PC. In addition to viewing the data online, it is possible to export the data directly to a PC in MS Excel format. The data can then be stored locally and distributed to additional personnel.

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Potable Water and Wastewater Residual Measurement

MICRO 2000® Residual Cell
The Wallace & Tiernan® Micro 2000 Residual Cell is the industry's most versatile, accurate and reliable on-line instrument for continuous measurement of oxidant residuals. High accuracy and the ability to mea-sure low residuals down to 1 PPB bring a new level of efficiency to the disinfection process regardless of the application. From potable water and wastewater treatment to cooling water, swimming pools and industrial processes, the Micro2000 Residual Cell helps you control your entire treatment process from pre-treatment using Potassium Permanganate, Chlorine Dioxide or Chlorine to distribution residual monitoring of Chloramines or free Chlorine.

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Potable Water and Wastewater Residual Measurement

DEOX 2000 Analyzer
The Wallace & Tiernan® Deox 2000 Dechlorination Analyser is the most effective on-line instrument for accurate measurement of both SO2 and total Chlorine residuals in waste-water plant effluent. With its "center zero" residual analysis capability, con-trol to an SO2 setpoint is achievable and ensures complete dechlorination at a level to support compliance with dis-charge permits. Costly SO2 overdosing is eliminated. The Deox/2000 uses a unique process to measure sulfite residuals. It is based on the principle of biasing the sample with an iodine source which is unaffect-ed by sample quality. With a stable "iodine bias", SO2 or Cl2 residuals are automatically determined from the measured amount of iodine reacted with the sample

Potable Water Residual Measurement

Depolox® 4 Residual Cell
The DEPOLOX ®4 measuring cell consists of a plexiglass body mounted on a housing accommodating a built-in flow control valve. The transparent plexiglass body means that the flow of sample water and correct measurement conditions can be visually checked at any time, this includes the rotation of grit in order to clean the electrodes and the quality of the electrolyte (KCI).
The actual CI2 measurement is performed using a 3-electrode configuration mounted in the lower part of the plexiglass body. The 3-electrode potentiostatic measurement principle is used. Optionally, a Pt100 sensor for temperature compensation can be fitted alongside the CI2 electrodes in the cell. Combined measuring and reference electrodes can be fitted in the drilled holes in the cover of the DEPOLOX® 4 to measure the pH value and redox potential.

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Gas Monitoring

GMS Gas Monitoring System
Wallace & Tiernan® GMS utilizes the latest on-line gas monitoring technology to provide a flexible and reliable, self testing detection system in a compact modular design.

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Gas Monitoring

GMS Gas Monitoring System - Gas Sensor Range
The GMS sensor monitors for the presence of specific gases in the atmosphere and warns the operating personnel in the event of a gas leak.
A number of alternative gas detection systems and sensor heads are available to suit a number of applications.

 


Water - Turbidity Measurement

TMS 561 Turbidity Monitor
The Wallace & Tiernan® TMS 561 Online Turbidimeter. Combining leading edge technology with 30 years of optical measurement expertise has allowed Wallace & Tiernan to offer an instrument specifically designed to meet the regulations of the EPA and ISO 7027.
Some of the many features include fast and easy calibration, verification in seconds, low maintenance, a bubble rejection system, a range of 0-1000 NTU, and a fail-safe design that ensures the instrument is always reading accurately. A data acquisition software system is available that allows logging and data storage for multiple turbidimeters. The advanced technology of the TMS 561 Turbidimeter will allow users to meet their specific requirements at an affordable price.

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Portable Photometer

P15plus
Precise measurement of water treatment parameters, chlorine, chlorine dioxide, ozone and pH values.

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The Wallace & Tiernan range of controllers has been created to provide total flexibility within chemical dosing and disinfection systems.

Products are designed with the very latest communications protocol, and offer a selection of supervisory control and data acquisition units at the highest level, through local controllers down to dedicated PID or function controllers.

  

 

Direct mA Input Control for Gas Feed Systems and Metering Pumps
The Wallace & Tiernan Products direct mA input positioner is available for remote or simple automatic control of a gas feed system or metering pump. This positioner accepts a 4-20 mA input signal from a remote manual control station, SCADA, or other centralized control system. An integral dosage function provides for dosing an input from a flow transmitter.

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SCU Signal-Conditioning Unit
The Wallace & Tiernan Products micro-processor- based SCU (Signal Conditioning Unit) provides automatic flow paced control of feed rate for gas feed systems and metering pumps. The SCU controller is specifically developed for chlorination/dechlorination and chemical feed systems. It is also ideal for remote manual control of a chlorinator or metering pump or it can be used to dose the flow input on a metering pump's SCR variable speed drive

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PCU Process-Control Unit
Wallace & Tiernan Products micro-processor- based PCU (Process Control Unit) is specifically designed for automatic residual or compound loop con-trol of disinfection, dechlorination and chemical feed in any water conditioning or industrial process application. Typically used as a setpoint controller, the PCU provides accurate control of gas feed equipment as well as chemical metering pump stroke length or variable speed drive applications. Easy operation, setup and calibration using menu-structured electronics make sophisticated control functions simple with the PCU.

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V600 Disinfection Controller
The new V600 Disinfection Controller is the very latest dedicated controller designed by Wallace & Tiernan incorporating the latest advanced electronics and process control application features. The V600 is designed to accurately maintain the optimum chlorine residual in water by the precise regulation of the dose of chlorine or sulphur dioxide, in chlorination/de-chlorination or chloramination.

The V600 controller provides a comprehensive and unrivalled list of features for manual or automatic control of simple borehole applications through to complex treatment work facilities.

 

ChemTrim Controller
The new Chemtrim Controller is the very latest dedicated controller designed by Wallace & Tiernan incorporating the latest advanced electronics and process control application features. The Chemtrim is designed to accurately maintain the optimum chlorine residual in water by the precise regulation of the dose of chlorine or sulphur dioxide, in chlorination/de-chlorination or chloramination.

The ChemTrim controller provides a comprehensive and unrivalled list of features for manual or automatic control of simple borehole applications through to complex treatment work facilities.

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CCU Chemical Changeover Controller
Automatic changeover of chemical supplies, from a duty to a standby supply, is a necessity in many installations which are not under constant supervision and is strongly recommended for all applications where temporary interruption of chemical supply might lead to unwanted complications. The CCU will provide this automatic changeover to ensure continuous chemical supply. The supply of chemical is controlled by a 3-port motorised valve, or by a pair of 2-port motorised valves. A pressure switch, or gauge is used to initiate changeover when the pressure falls to a preset level.

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DCU Dosing Changeover Controller
The Wallace & Tiernan DCU Dosing Changeover Unit provides a cost effective method of controlling switchover between dosing systems either manually or automatically initiated as a result of alarm conditions from fault contact inputs from the process.
The user friendly device gives clear indication as to the status of each component within the dosing system with LED displays indicating whether Duty, Operating or Failed.

 



ChemPhos Controller – Phosphate Control System
To meet the requirements of the Urban Waste Water Directive, Wallace & Tiernan have designed the ChemPhos controller. The controller is designed to work in conjunction with a variety of chemicals and is supplied as a stand-alone controller or as part of a complete chemical dosing system. The choice of chemical will depend upon the particular site requirements and the operational conditions. The ChemPhos control system provides the user with the versatility of control to suit the application and the chemical used whether it be in liquid or granular form.


ChemSept Controller - Septicity Control Systems
Today's concerns with the prevention and treatment of septicity are centred around optimising treatment and reducing chemical costs. For this reason Wallace & Tiernan have designed the ChemSept controller. ChemSept is designed to work in conjunction with a variety of chemicals and is supplied as a stand-alone controller or as part of a complete chemical dosing system.
The choice of chemical will depend upon the design of the sewage network and the operational conditions. Chemical injection may take place at the beginning or the end of the network. The chemical selected may be used to treat the septicity once it has been formed or part of the preventative measures.