maintenance todayHow to draw a metrological planEnergy monitoringCounting the cost of steamIssue 4 06/2009 the magazine for all instrument usersIFS 5.0: Are you ready?Sanofi-aventis:The story of a long-term partnership2Maintenance Today - Issue 4 - 06/09the magazine for all instrument usersIn this issue:IFS 5.0 - are you ready?How to draw up a metrological plan Energy monitoring - Counting the cost of steamEfficacy and confidence: the pillars of our long-term relationship with Sanofi-aventisRevitalize your installed baseTrends, solutions, shared experiencesEverything you need to get the best out of your installed base!p. 3p. 4p. 7p. 9p. 11Maintenance publications issued recentlyThe Maintenance Guide - new release: this manual is the reference text for your production, metrology and maintenance teams. Its content has been updated and the new issue is available from 07/2009. Keep a copy on your desk all year round!Maintenance Actions is a handy collection of information sheets dealing with a specific subject of direct relevance to your day-to-day operations. Each sheet gives you option for immediate action. We publish several sheets each year.Recent issues: Need a quick repair time? We can work on this together (03/2009)International Food Standard 5.0 -Passing the audit with process instrumentation (06/2009)Find all these documents online atwww.products.endress.com/maintenance_publicationsTo receive future issuesTo subscribe or to receive the electronic version (PDF), please fax us back the coupon below:Company: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Name: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Title: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Department:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Address:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tel:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-mail:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Please send me: Electronic version (PDF)Printed versionBothPlease send us your comments: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .The Maintenance GuideTips and reference information to keep your installed base up and running2009 Updated. . . .. . . . . aytionsce GuideT h e Ma i n t e n a n c e Gu i d eE n d r e s s + Ha u s e rIFS 5.0 - Are you ready?More and more distributors now require food tranformation companies to comply with the last version (5.0) of the IFS - which now includes particular requirements regarding process instrumentation.The first point directly concerns the selection of the instrumentation. Devices that are in contact with the product shall be suitably designed and specified for an hygienic use, as for the life sciences industry. Before commissioning, it shall be verified that the instrumentation fits for its defined purpose.Implementing a monitoring planOnce in operation, the measurement instrumentation must be periodically monitored in accordance with a predefined plan. Scope and frequency of the audits shall be determined by risk analysis. Anyway, internal audits shall be carried out at least once a year in all departments. Any deviation and the associated corrective actions shall be documented.In circumstances where the control of process and working environment parameters (temperature, time, pressure, chemical properties etc.) is essential to ensure the product requirements, such parameters must be monitored and recorded continuously and/or at appropriate intervals.Following the example of the life sciences industries, the process instrumentation must now be given periodic checks and calibrations. To be compliant, the agrofood company must first clearly identify the measuring and monitoring devices required to ensure compliance with product requirements and record them on a document.Check and calibration of the instrumentationIn a second step, all these measuring devices shall be checked under a monitoring system at specified intervals in accordance with defined standards/methods. The results of the checks shall be documented and corrective actions carried out, where necessary.The calibration status of the measuring devices shall be clearly identified (by means of a labelling at the machine or on a list of test devices).Finally, it should be noted that any analyze that would be important for the food safety - calibration in particular - must be conducted by an ISO 17025 accredited laboratory.For the past year we have supported IFS managers from several companies to draw up a process instrumentation monitoring plan, implement the appropriate solutions and thus pass the IFS audit. Keen to know more? Attached to this magazine, you will find a flyer that gives further information.Version 5.0 of the International Food Standard (IFS) has numerous consequences for installed instrumentation, the associated documentation and the metrology. Which concrete actions shall now implement agrofood companies?InternationalFood StandardSubstituting to version 4.0 from January 2008,the IFS 5.0 includes no more recommendations, but only requirements. Six new KO criteria have been added to the four existing ones.This version includes the new requirements of the Global Food Safety Initiative (GFSI) Guidance Document Version 5. Thus IFS reaches its objective of meeting all internationally harmonizedrequirements, and to be a worlwide recognized reference for food quality and safety. At the end of October 2007, 7300 companies were IFS certified throughout the world.3Maintenance Today - Issue 4 - 06/09How to draw up a metrological planMany companies are now in the habit of calibrating their instruments once a year, although there is perhaps no need to pay the same degree of attention to every measuring point. In many cases, it is sufficient to focus on the instruments that play a critical role.Marianne Hatterer, you are in charge of developing services at the Endress+Hauser Group, and have helped your clients to implement a metrological plan on many occasions. What are the factors to bear in mind when defining which measuring points to include?To start out on the best basis, you should begin by noting every measuring instrument on the plant. Identify and make a list of all the equipment parts and all the instrument-related systems. This list should also include details such as a description, local information, working range and history, and any other points that provide a better understanding of the parts function.The first stage in any analysis of the data gathered is to identify which instruments are critical to the application, the production environment and operator safety. This calls for teamwork. We will set up a meeting with the Head of Metrology (or Quality, depending on the case), the Head of Production - who has in-depth knowledge of the process and the related instruments - and the Head of Maintenance. Besides generally being the person in charge of calibration, the Head of Maintenance will also be able to contribute what they know about the process environment, the condition of the installed instruments, the type of maintenance work carried out and, finally, any limitations imposed by the plant in terms of servicing.The last two articles in the Maintenance Today illustrated the beneficial role of metrology in terms of ensuring optimum functioning of the production process. Implementing a metrological plan can even help production companies to increase profit. Providing, of course, that a methodologicalapproach is adoptedMarianne Hatterer using Endress+Hausers calibration and maintenance mangement software CompuCal4Maintenance Today - Issue 4 - 06/09Lets take a simple example to illustrate this thinking: a good biscuit should be cooked to just the right degree, be tasty and the right size. The first thing to look at, then, is the cooking phase and the parameters impacting on the result: essentially cooking time and oven temperature in this case. The next stage is to try to identify the elements likely to influence the quality of the pastry, e.g. quality and quantity of ingredients and adherence to the recipe instructions.The relative importance of some of these parameters will help identify measuring points that merit particular attention in relation to metrology. Having defined parameters in terms of their importance for the product, this step is repeated with regard to the process, and then with regard to operator safety. On completion of this first stage of analysis, the working group will have compiled a list of instruments ranked in order of critical importance, i.e. high, average, low, and a list of non-critical instruments.The primary benefit of this work? Instruments classified as non-critical do not require any metrological monitoring in particular, hence there is no need to continue periodic calibration. As long as the user can prove to the auditor that these instruments have no impact whatsoever on the quality of the finished product, they are entirely at liberty to decide they no longer require calibration. In many cases, the second benefit is a reappraisal of the choice of instruments in the context of the application. A Ferrari is not the ideal car for an uphill race, and may even cause lots of problems. The same goes for the instruments you employ.How to define the calibration frequency of instruments deemed critical?The ideal calibration frequency should be just what it takes to guarantee the instrument specifications in the context of the production process. To achieve that, we will consider both the factors in favor of frequent calibration and those against it.With this working group, we will start from the finished product - and the tolerance permitted in relation to its quality - and go back through the various stages in the production process. At each stage, we will look at the instruments in place and ask ourselves: Does this instrument impact on the quality of the product (or any intermediary product), on process functioning or on operator safety?Why start with the finished product?Users frequently define Maximum Permissible Errors (MPE) on the basis of the instruments they purchase, when what should be most important are the application specifications in relation to the quality of the finished product. Tolerances at all levels of the process should be defined in relation to desired results. In the context of instrumentation, MPEs express defined tolerances for the function being monitored. Taking it a step further, MPEs should provide a basis for deciding what instruments to install, not vice versa!Four categories of critical importance Instruments should be classified according to one of the four categories of critical importance below:Instruments critical for the product: instruments that, if defective, may have a direct impact on product qualityInstruments critical for the process/system: instruments that, if defective, may have a direct impact on process or system performance, without affecting the quality of the final product, or safetyInstruments critical for safety /the environment: instruments that, if defective, may have a direct impact on operator safety, or the environmentNon-critical instruments: instruments that, if defective, are thought not to have any impact on product quality, process or system performance, safety or the environment.5Maintenance Today - Issue 4 - 06/09The key factor, of course, is the desired measuring precision which is closely linked to the Maximum Permissible Error tolerated in order to guarantee the quality of the final product. But decisions will also be influenced by the varying nature or condition of the product in contact with the instrument, the continuity (or discontinuity) of the process, the relative severity of the ambient conditions or the presence of CIP (Cleaning in Place). Similarly, considerations such as whether the instrument is used continuously or at intervals, time available for calibration, ease of disassembly and possibility of on-site calibration will also influence calibration plans. And an analysis of calibration history will obviously allow frequency to be adjusted in relation to any non-conformities that are identified. A final parameter to consider when deciding whether to reduce the frequency of calibration is the risk associated with an excessively long period without calibration. It is useful at this point to remember that the purpose of calibration is to certify the quality of the products that have already been manufactured, not of those yet to be manufactured. Will non-conformities be detected if the instrument is not calibrated for a certain time? Will the production operator, wanting to compensate for a production non-conformity, add too much raw material or modify the process, thereby causing additional costs? This is why the interval between two calibrations rarely exceeds two or three years in the case of critical apparatus.Why do companies tend to opt for a one-year interval?It must be something to do with a natural biological rhythm that suits everyone, more or less, auditors included! Because there is no mention of one-year intervals in any regulations. The only stipulation is that the calibration interval must be determined as a function of statistical factors. And as auditors are not necessarily calibration specialists, no one will ask any questions if you calibrate once a year. But if you opt for a longer interval, you will need arguments in support of your decision.Despite being the usual practice, one-year intervals are not necessarily a good thing. Whereas a flowmeter can go for two or even three years without calibration (depending on the application), a year is generally too long in the life of a pH measuring device.What can Endress+Hauser do for companies with a metrology department?As an instrument manufacturer, we apply our measuring systems know-how to our clients application conditions. And we have tools to implement, in the initial phase, our method for drawing up a metrological plan, then for implementing the plan itself. We help our customers achieve dynamic management of their installed instruments, i.e. we ensure they are capable of planning, triggering and documenting maintenance and calibration operations. At the operational level, we bring our skills, mobile equipment and accredited laboratories to bear in carrying out calibration work in combination with customers own resources.Finally, our contribution helps the Head of Metrology to emphasis the importance of process optimization to their team. For in many cases, metrology is still perceived as a burden, even if those in the life sciences or the agroalimentary industry are more aware than others of its benefits in terms of process control. And with the current context making it more necessary than ever to economize raw materials, energy and water, an ever-growing number of industry practitioners now have a better appreciation of the role of metrology in cost control.In the next issue: Laboratory or on-site calibration?Inventory of critical devices in a pharmaceutical plantEndress+Hauser software solutions to serve metrological activities CompuCal is a high performance system to efficiently maintain and calibrate your on-site instrumentationwww.endress.com/urlurlurlW@M - Life Cycle management is an open and flexible information platform with on-site tools and services supporting you along the life cycle.www.endress.com/urlurlurl6Maintenance Today - Issue 4 - 06/09Counting the cost of steaminevitable. For this reason, steam consumers are calling more and more for a verifiable method of invoicing steam, which is acceptable to both steam producers and consumers. Operators of steam generators are required by the conditions of emissions trading to balance the steam quantities produced in a clean and verifiable manner. Inaccuracy is the main issueTo calculate the steam mass flow rate, pressure, temperature and flow are measured. Three sensors are therefore needed, each of which will have an inherent inaccuracy. This makes it difficult to predict the total system uncertainty under operating conditions. This is important, for example, in the auxiliary circuits in chemical parks, which were designed many decades ago to allow for high throughput and high rates of flow. Nowadays these circuits are often operated at the very low end of their operating range, which is completely different to the original design operating point. This can have a huge impact on the total performance of the measuring point, with Energy monitoringunaccounted steam usage amounting to several thousands of euros per month. An aggravating factor is that the steam producer must remove the measurement technology used in order to either upgrade equipment or calibrate the components. This results in downtime and additional costs. Up to now, there has been no measurement technology that facilitates inline testing. This is unique: Endress+Hauser now provides its customers with a convenient all-round package for verifiable steam invoicing. It consists of four parts:1) Application-optimized measurement technologyFlow measurement using the principle of vortex shedding is ideal for the reliable and long-term stable measurement of volume flow in steam applications. This robust measuring principle is widely accepted. In addition to tried and tested measurement technology for pressure, temperature and flow, an external energy Endress+Hauser combines high quality measurement with unique tools and services to guarantee a precise and sustainable calculation of steam usage this is the first such solution of its kind in the world.Due to the environmental and economic issues, focus is shifting more and more to energy measurement, balancing and invoicing. This applies in particular to steam. But up to now, there has been no solution that, for example, allows steam to be measured in a verifiable manner.An unstable mediumSteam is not subject to legal metrology controls since it is an unstable medium and cannot be traceably calibrated using a weighing scale. In other words, there are no clearly defined requirements according to the verification ordinance that stipulate measurement technology, accuracy, maintenance intervals etc. Therefore, when it comes to balancing and invoicing, disagreements are almost Image courtesy of Byworth Boilers7Maintenance Today - Issue 4 - 06/09monitoring system from Endress+Hauser calculates the quantity of steam consumed. The cost-saving complete solution is universally applicable.2) Real-life calculation of total accuracy for the entire measuring pointEndress+Hauser has now made it possible to calculate the maximum total uncertainty under process conditions, i.e. even in unfavourable operating conditions which, experience has shown, result in maximum measured errors. This calculation takes into account all the factors relevant to the process that can influence the measurement error of the steam measuring point. Using our solution, the user receives a traceable calculation of the overall performance, of the steam measuring point, taking current operating conditions into account. 3) On-site calibration to guarantee verifiable measurement resultsAll Endress+Hauser sensors are calibrated prior to delivery using accredited calibration rigs. We are also an independent calibration partner, accredited in accordance with ISO/IEC 17025 for providing onsite calibration services for flow, pressure and temperature. To ensure that the theoretically calculated accuracy of the entire measuring point can also be verified on a practical level, we provide a continuous, on-site calibration solution for sustained testing of steam systems. Each component can be tested by carrying out individual calibrations using traceable calibration instruments. In line calibration Three sensors provide an energy manager with flow, temperature and pressure - just the right combination of high qualityinstruments! The RMS621/RMC621 energy manager calculates the quantity of gases, liquids and water vapor consumed.A relevant contribution to energy monitoringThe biggest part of the energy involved in the process of a brewery is for steam production. The measurement concept has immediately convinced us. And thanks to Endress+Hausers calibration service, the precision of the measured values and the process safety are now proven and ensure the permanent efficiency of our energy monitoring.Hartmut Sturhann, Energy Manager, Beck & Co brewery, Bremen (Germany)With Fieldcheck, flowmeters are monitored while they are installed, without any disruption to the process.for the flowmeter can be facilitated by short-term operation in a bypass. For pressure and temperature measuring devices and for the external calculator, traceable calibration instruments are used. The onsite calibrations are carried out by trained and certified calibration technicians in accordance with SOP (Standard Operating Procedures). Calibration logs provide the user with continuous verification of the calibration results and, for the first time, with a statement of the real total accuracy of the measuring point.4) Verification without removing the measuring deviceWe also offer our FieldCheck test and verification tool. This monitors and verifies Endress+Hauser flowmeters while they are installed, without any disruption to the process. This solution is the first of its kind to enable inline verification directly during operation - a huge advantage for steam producers. What makes our solution stand out from the rest? As far as the measurement technology itself is concerned, all suppliers are fundamentally similar. However, we believe that only Endress+Hauser is currently in a position to carry out a traceable calibration and process checks. Most importantly, as an accredited calibration service provider with verifiable on-site calibration, we are well ahead of the game. Tangible resultsEndress+Hauser was requested by a well known energy supplier to assist in finding a solution to avoid regular discussions with their steam customers. The customers were querying the measurement technology and the measuring solution. The invoiced amounts were allegedly much too high. With Endress+Hausers solution, they were able to prove using traceable standards that the measurements were correct. The feedback confirmed that the solution deals effectively with all of the points necessary to verify optimum performance, starting with the measurement, including uncertainty calculation and regular testing during operation.Everyones desire is to pay only for what they get without ongoing discussions on steam balancing and invoices. Endress+Hauser can help.For further information:contact us at 00 xx xx xx xx8Maintenance Today - Issue 4 - 06/09The third-largest pharmaceutical Group worldwide, Sano-aventis has one of its biggest research and development sites in Montpellier (France). The Montpellier site, which employs 1800 people, covers every stage in the research and development cycle: from understanding illnesses and their biological foundations right through to launching new drugs.9Maintenance Today - Issue 4 - 06/09Regulatory requirements (laboratory controls, on-site inspections), uncompromising health specifications and business goals all impose the highest standards of vigilance and monitoring at all stages of the drug manufacturing process. All drugs marketed by Sanofi-aventis must be manufactured in line with both the European and American pharmacopoeias. The company also has to prove the conformity of its metrological operations with the ISO 17025 standard.At the Montpellier site, Sanofi-aventis decided to outsource metrological operations in order to concentrate on its core businesses and activities - whilst still of course retaining responsibility for, and management of, these activities.Keen to entrust this metrology and quality-related work to a reliable external company specializing in the pharmaceutical industry, Sanofi-aventis chose Endress+Hauser.For Yvon Sales and Jean-Pierre Montseny, Manager and Deputy Manager of the Metrology Department, choosing the right service provider was all-important. They explain how, in time, a service provider becomes a real partner: Everyone involved must be perfectly acquainted with the specific requirements (GMP, GLP, At the Montpellier (France) research and development site, Sanofi-aventis decided several years ago to outsource metrological operations in order to concentrate on its core businesses and activities. Endress+Hauser suggested and supplied exactly the right services to meet Sanofi-aventis expectations.Efficacy and confidence: the pillars of our long-term relationship with Sanofi-aventis10Maintenance Today - Issue 4 - 06/09Jean-Pierre Montseny,Assistant Head of MetrologyGCP) of the pharmaceutical industry. As far as metrology is concerned, COFRAC accreditation for the relevant parameters is a prerequisite. After that, we attach great importance to the expertise and dependability we can expect from Endress+Hauser metrologists. Their experience and intimate knowledge of both our equipment and our site ensures maximum reactivity: they have become almost part of our company. Last, but not least, we require autonomy and flexibility. For example, the plant scheduled for attention may not always be available as planned, so engineers have to be able to adapt and work on something else instead.Providing real support to the metrological teamThe story began in 1993: The very first metrology contract focused on implementing processes and on training operators working on the pilot project (chemical development, micro-production).In 1995, Endress+Hauser was involved in implementing Sanofi-aventis metrology processes and operations from the day the Metrology Department was set up, which allowed the two companies to move forward in the same direction.Over the years, further contracts were signed for numerous areas of the site. Each year, Sanofi-aventis draws up a metrology plan for Endress+Hauser, thereby providing long-term transparency in relation to work carried out by engineers on the site.Services provided by Endress+HauserThree Endress+Hauser engineers are available to Sanofi-aventis to work on over 1000 instruments: in addition to dealing with emergencies and technical problems, they also carry out cartography (OQ/PQ), check laboratory equipment (ovens, heating chambers, environmental test chambers, incubators, autoclaves), processes and reference standards (temperature, hygrometry, electricity). Endress+Hauser takes care of critical operations where all risk of error has to be completely ruled out.All metrology operations are now 100% under control. Thanks to the certificates guaranteeing the traceability required during inspections, Sanofi-aventis knows it is well prepared for audits!The focus is now on optimizing processes and calibration intervals in order to avoid needlessly excessive attention to quality. Looking at the bigger picture, Endress+Hausers task is to streamline the field metrology by adapting it to new internal and external requirements - which we can sum up as continuing to develop together.Yvon Sales,Head of MetrologyEndress+Hauser has made qualified metrological engineers available to us on a permanent basis, which is very important for us, acknowledge Yvon Sales and Jean-Pierre Montseny. And the fact that these engineers are familiar with our site is a huge advantage: it means we can ask them to handle problems related to critical operations. The engineers are always with us swiftly in an emergency or if we have technical problems, and never get in the way of any of the other site operations. Endress+Hausers prompt response is much appreciated: having a service provider nearby means we can be more flexible in our daily organization. We are very satisfied with the relationship of confidence that has been established and we recommend Endress+Hauser to other companies without hesitation.11Maintenance Today - Issue 4 - 06/09Revitalize your installed baseEver conscious of our commitment to anticipating your needs and to bringing you all the benefits of state-of-the-art technology, Endress+Hauser attaches great importance to on-going development of its instrument range and continuous support of your installed base.Are you affected by the upcoming discontinuation of any of these products (see adjacent)? We can help you decide on the best solution for you.Promass 80/83 M Mass flowmeter12/2009Depends on the application:Promass 80/83FPromass 80/83IPromass 80/83SCNGmassNo*Soliphant FTM260Level measurement for solids12/2008FTM20/21Cost reductionFit for higher grain sizesYes*Deltapilot S DB50/DB50xHydrostatic pressure measurement12/2009FMB70Increased precisionYes*11500Z/11500ZMCapacitance HT probe12/2008FMP45/FTL71RobustnessEasy to installYesYesPromass 84MMass flowmeter12/2010Depends on the application:Promass 84FPromass 84IPromass 84SCNGmassNo*Withdrawn product Type of productDate of discontinuationSuccessorSuccessor advantagesMechanical compatibility *Functional compatibility ** = Please contact us= Full compatibility= Partial compatibility= No compatibilityTMT184Temperature transmitter03/2009TMT84Dual sensor inputAdvanced diagnostics functionsIncreased precisionYesYesRIA250Process display10/2009RIA45Dual input Linearization and Differential functions Min and max values storageYesYesDeltatop/set DPX1X/DPX5XDPressure sensors09/2008Deltatop DOXX/DPXXCompact versionAdditional featuresYesYesOur phase out policyEndress+Hauser are committed to the long term support of all our products. We undertake to support and service our products for a period of ten years after notice of product withdrawal.This covers where possible availability of spare parts. However we reserve the right topropose alternative solutions including replacement products, if deemed appropriate.Instruments InternationalEndress+HauserInstruments International AGKaegenstrasse 24153 ReinachSwitzerlandTel. +41 61 715 81 00Fax +41 61 715 25 00http://www.endress.cominfo@ii.endress.com12.06/I.I.CM 004H/29/ae/06.09PF/INDD CS2ISE electrodes For ammonium and nitrateQ4/2008 Combined electrodeNew technology allowing the monitoring of ventilation basins in waste water treat-ment plants and thus energy savingsPart of the Life Cycle Management concept, the W@M Device Viewer is a free tool to help you get information on a device. By entering a valid Endress+Hauser serial number, you can access specific device details such as:The serial number can be found on the nameplate of instruments. If you would like to use the Device Viewer, visit www.endress.com/deviceviewerFor further informationplease call: 03 89 xx xx xxNeed to check the status of your products?New Device ViewerNew product Type of productLaunch dateAdvantagesPromag 10/50D Electromagnetic flowmeter09/2009DN25, 40, 50, 80Completes the Promag rangeDeltabar M PMD55 Differential pressure sensor05/2009Compact versionEExdLocal configurationIntegrated Flow-level-pressure functionNew productsRIA46Field digital display07/2009Identical to RIA45 + field boxMemograph M Recorderxx/2009High quality TFT display256 MB internal memory for data storage (enough for 3 years)special software for batch managementremote alarmMicropilot M FMR244 Level radar for solidsQ4/2008New HF module (+35 dB) specially designed for the measurement on solids New advanced dynamic softwareLiquiphant density Density measurementQ4/2008Density measurement with Liquiphant M and FML621 controller for temperature compensationFML platform can handle 5 measurement pointsHigh accuracy and repeatability Order code details Date of production Product status/availability Spare parts Technical information Documentation