D A N F O S S A N A L Y T I C A L – C O M P L E X I T Y M A D E S I M P L E

E V I T A® A N A L Y T I C A L M E T E R S

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Focusing on water for decades does not pass unnoticed. That’swhy Danfoss today stands out as a global leader when it comes tocontrol of all processes in the water cycle.

Thanks to our comprehensive, reliable and user-friendly productrange as well as our unique application know-how, professionals ofthe water industry all over the world have come to appreciate ourpartnership for profitable business.

We strive to return their confidence with even stronger commitment,leading to regular technological breakthroughs. These are partlyachieved by our own R&D staff, partly by collaborating with keycustomers like Vivendi and ONDEO Suez in development projects.

To our partners, this close interaction results in better operatingplants while we experience two-figured growth rates, bringing usamong the three leading Instrumentation and Controls companiesworld-wide regarding water. And as to dissolved oxygen measure-ment in wastewater treatment plants, we are an unrivalled no. 1.

Add to this that our water business is backed up by the globalDanfoss Group which:• has a wholly owned sales and service subsidiary in 120 countries• has 16,000 employees world-wide• produces more than 100,000 components each day• was among the first to obtain ISO 9001 as well as ISO 14001

approvals

Join Forces With

A G L O B A L W A T E R P A R T N E R

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P I L L A R S F O R P A R T N E R S H I P

T H E D A N F O S S W A T E R B U S I N E S S I S S U P P O R T E D B Y F O U R P I L L A R S

Worldwide Customer CareThanks to our responsive service network you are always sure tohave your plant up and running, irrespective of your domicile onthis planet. And with a service contract your system is secured aslong as you wish.

Complexity Made SimpleDanfoss components comply with the rules of Utmost Simplicity:among the highlights are oxygen meters calibrated in five minutes,flowmeters verified without leaving the pipes and inverters automa-tically adapting to motors.

Advanced TechnologyWe build on partnership projects with customers as well as anextensive network with research institutes throughout Europe. Andnaturally we utilize the advanced R&D facilities of the DanfossGroup to the max.

The Production CompanyDanfoss supplies products of a uniform, high quality – on time. 15years of ISO 9001 approval has trimmed production as well aslogistics to optimum performance. And our manufacturing compli-es with the ISO 14001 standard.

Water ValvesFlowmeters Analytical Meters Drives and Controls

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Measurement at plant inlet • The EVITA® INSITU meter isperfectly suitable for inlet mea-surement. Unlike other meters, it does not require special ultra-filtration units.

• By measuring nutrient contentsand flow, the actual load isdetermined. In this way you canadd a feed-forward control tothe usual feedback control.This is beneficial in cases with rapidly changing loads.

• The measurement of orthop-hosphate controls the dosing ofchemicals in primary settlingtanks.

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EVITA® Analytical Meters in

W A S T E W A T E R T R E A T M E N T

Nutrient measurement in thesewerage system• Measurement is carried out in

rainy weather. After the firstnutrient-saturated flush, thealmost pure rainwater is oftenlead directly to the recipient,since pure water can upset thesedimentation process andlead to loss of active biomass.

• Sewage water from variousareas often contains differentloads. By measuring nutrientand flow, sewage from severalareas can be mixed in order tokeep the plant load constant.

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EVITA® analytical meters ensure optimum process controlresulting in increased plant capacity, cleaner effluent, lesssludge production and dramatically reduced energy con-sumption.Typical applications for EVITA® OXY dissolved oxygenmeters and EVITA® INSITU nutrient meters are:

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Outlet measurement• For monitoring purposes anddocumenting the quality of thetreatment. Regulating Authoritiesoften demand measurements ofall parameters: oxygen, ammoni-um, phosphate and nitrate.Taxes are often based on themeasured values.

• For continuous fine tuning ofplant process control parame-ters.

Oxygen profile measurement• The nitrification basin is divi-ded into four reactors. AnEVITA® OXY transmitter ineach reactor controls the airflow of the four air diffusermodules. The result is energysavings in the range of 30-40percent as well as up to 30 per-cent higher plant capacity.

• Ensuring anoxic conditions inthe denitrification basin byoptimising the oxygen level atthe outlet of the nitrificationbasin.

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Measurement in biologicalaeration basins• EVITA® OXY dissolved oxygenmeters measure the actual oxy-gen content for aeration control.

• EVITA® INSITU nitrate meterscontrol the recirculation.

• EVITA® INSITU ammonium meters control the oxygen set-point.

• EVITA® INSITU orthophos-phate meters control dosing ofphosphorus removal chemicals,like iron sulphate is used tomonitor the bio-p process.

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5Air

Air

Air

Air

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Dissolved Oxygen Measurement

I N T E L L I G E N T • R E L I A B L E • S I M P L E

High accuracy and noise immunity.

The 4-20 mA HART® transmitter is

mounted directly behind the oxygen

sensor and the Pt 1000 temperature

sensor, ensuring high accuracy.

On-line membrane punc-

ture detection.

Thanks to a three-electrode

design – two for measure-

ment, one for monitoring –

the membrane is constantly

monitored. Any rupture or

other leakage is instantly

detected.

Increased sensor life and stable read-

ings within minutes after power-up.

A half metre silver wire makes the

surface area of the anode as large as

possible, increasing the sensor’s life to

2-3 years and ensuring the sensor is

polarized within minutes after power-

up. No need to recalibrate the sensor

1-2 days after commissioning.

High reliability and accuracy.

A prestressed bonded membrane

ensures predictable permeability at

changing temperatures. At the same

time contamination of the electrolyte

by sewage water is prevented.

Automatic cleaning.

The self-cleaning ball float

with the specially designed

fins keeps the sensor clean for

months – reducing mainte-

nance to a minimum.

Long sensor cables.

The loop powered two-wire 4-20 mA

HART® transmitter allows up to 1,000

metres between the transmitter and a

USC signal converter/display/PLC.

Built-in auto calibration.

The built-in TILTCAL® calibration function initiates automatic

calibration when the transmitter is turned over. Combined with

a USC signal converter, this procedure also compensates for

barometric pressure, humidity and salinity.

For installation everywhere.

The EVITA® OXY transmitter is intrinsically safe,

approved by both CENELEC and UL.

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Maintenance – a Matter of MinutesPerhaps the paramount benefit of the EVITA® OXYdissolved oxygen transmitter is minimum maintenance:• Calibration is limited to only three times a year.• No need for regeneration. The sensor is simply

replaced – in less than 5 minutes every 2-3 years.• Unique transmitter design, including four fins,

makes it self-cleaning.• Cleaning is done by wiping the sensor with a cloth

– three times a year.

Calibration – a Twist of Your HandThe EVITA® OXY transmitter is calibrated automa-tically. Thanks to the one of a kind TILTCAL®

calibrating procedure, all it takes is a helping hand:• Tilt the transmitter: a tilt switch will initiate the

calibration routine. Done after 5 minutes.• Forget about calibrating the zero point: the low cost

disposable OXY 1100 sensor is exchanged beforezero-point calibration becomes necessary.

• Repeat calibration three times a year, and yourEVITA® OXY transmitter remains as accurate asthe day you installed it.

No Regeneration: Fast ReplacementAs is the case with all dissolved oxygen meters,EVITA® OXY 1100 sensors have a limited operating

life. However, these sensors require no messy regene-ration: no electrode cleaning – no fiddling withgaskets and chemicals. You simply replace the lowcost disposable OXY 1100 sensor. Danfoss has madethe whole process so simple:• The sensor’s lifetime is monitored, alerting you the

moment replacement is required.• Unscrew the collar that holds the sensor in place.• Insert the new sensor. Done in 5 minutes – with no

mistakes possible.• Danfoss dissolved oxygen sensors have unlimited

shelf-life and do not dry up in open air.

OXY 1100 sensor Mounting bracketPrinciple Replaceable Clark sensor measuring Bracket mounted on handrail with pivot function

dissolved oxygen. Typical life 2-3 years to hold 50 mm (11⁄2”) ABS or PVC pipe

Ambient temperature Storage: 0°C to +70°C Storage: -40°C to +70°COperation: Media: 0°C to +50°C Operation: -40°C to +70°C

Material Membrane: 50 µm (25 µm, 125 µm) FEP Teflon® Base: Stainless steelCathode: Gold, Anode: Silver, Electrolyte: KCl Holder: Carbon & fibreglass reinforced polyamide

Weight 15 g 0.8 kg

Transmitter OXY 4100 OXY 4150

Measuring range Dissolved oxygen: 0 to 10-500%, 0 to 0.1-50 mg/l or ppm, temperature: 0 to 70°C

Measuring uncertainty Oxygen: ± 0.5% of full scale, temperature: ± 0.1°C

Current outputs 4-20 mA, (scalable by HART®) galvanic isolated. Max. load 750 ohm@ 30 V d.c.

Response time 50 µm: τ = 22 s (25 µm: τ = 7 s, 125 µm: τ = 110 s)

Cable 10 metres (2×0.75 mm2 shielded cable)

Enclosure rating IP 68 to IEC 529 (1 m) IP 68 to IEC 529 (10 m)

Ambient temperature Storage: -40°C to +70°C, Operation: Air: -40°C to +60°C, Medium: 0 to +50°C

Power supply 12-30 V d.c.

Automatic calibration Compensating for temperature (pressure, salinity, and humidity by entering values using HART®)

Approvals CE, C-tick Emission: EN 50081

Enclosure material PBT/PC

Weight/size 2 kg/diameter: 240 mm 1 kg/diameter: 50 mm, length: 180 mm

With the EVITA® INSITU transmitter range, nowavailable in its second generation, improved accuracyand profitability has come within reach for wastewater treatment plants. The product series covers concentra-tion measurement of three different nutrients:

• Ammonium• Nitrate • OrthophosphateThe three sensors look alike and they share the samewidely approved colorimetric measuring principle.

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Nutrient Measurements

– G O I N G T O T H E S O U R C E

Reagent container.

Reagent container complete with reagents, standards and waste

bag. Couplings with shut off valves ensure leakage free, easy

replacement.

Auto monitoring.

The sensor has built-in auto monitoring, raising an alarm in

case of measurement error.

Photometer.

A new and improved photometer provides the USC signal con-

verter with an extremely accurate electrical signal.

Robust pump.

A new and improved ceramic pump, resistant to chemicals and

with a long life. It requires no replacement of tubes, and its

chemical consumption is ultra-low.

Anti-fouling ion filter.

Ensures maintenance-free measurement for a long time

How it works• The carrier (water) is pumped across an ion filter. • The ions migrate to the carrier until the quantity of

ions in the carrier is equal to the quantity in theliquid to be measured.

• Reagents are added.• The mixing of liquids results in a colour change.• The colour intensity, depending on the concentration,

is measured by a photometer, and the measurementis transformed into an electrical signal. This signalis displayed on the USC signal converter.

• The waste liquid is pumped to a sealed waste bag inthe reagent container.

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Key Benefits For Fast Payback • Improved process control during changing loads• Increased plant capacity up to 25 percent• Energy savings up to 30 percent• Reduced consumption of chemicals• Sludge reduction up to 15 percent• Improved effluent quality

In Situ For RealThe EVITA® INSITU is rightly called so: as the onlymeter in the marketplace it measures directly in thewastewater at the point where the concentration mustbe known. No external factors influence the measure-ment, as is the case with conventional analyzers,working with ultrafilters or sedimentation equipment,pumps or long pipes.

A Real On-Line Nutrient MeterAs the only meter available, the EVITA® INSITUseries offers real on-line measurement of wastewater,and it measures the ion concentration every second.The response time is constant, making it ideal foradvanced process control.

Filter Void of FoulingA patented ion filter performs a vital function as onlyions can pass leaving bacteria and particles outside

the EVITA® INSITU transmitter. Thanks to its anti-fouling characteristics, minimizing bacterial growth,it ensures correct measurement.

Minimum MaintenanceMaintenance of the EVITA® INSITU transmitter isbeyond complicated cleaning or calibration routines.In fact, it is a matter of minutes: 15 every 6 weeks isall it takes replacing the reagent container and the ionfilter. The transmitter will then operate trouble-freefor another 6-13 weeks.

Transmitter Ammonium NH4-N Nitrate NO3-N Orthophosphate PO4-PMeasuring range(mg/l or ppm) 0-20 0-100 0-10 0-6 0-15 0-40

Standard method Indophenol blue method Hydrazinsul- Molybdenum blue method Vanadate phate method molydate

yellow method

Limit of detection (LOD) 0.1 ppm 0.3 ppm 0.1 ppm 0.05 ppm 0.7 ppm

Limit of quantification (LOQ) 0.6 ppm 1.0 ppm 0.6 ppm 0.3 ppm 2.4 ppm

Measuring uncertainty 0.6 - 20 ppm: 1-100 ppm: 0.6-100 ppm: 0.3-6 ppm: 2.4-15 ppm:±10% of actual ±10% of actual ±10% of actual ±10% of actual ±10% of actualconcentration concentration concentration concentration concentration<0.6 ppm: <1 ppm: <0.6 ppm: <0.3 ppm: <2.4 ppm: ±0.06 ppm ±0.1 ppm ±0.06 ppm ±0.03 ppm ±0.24 ppm

Response time (90%) 10 min. 24 min. 15 min. 15 min. 15 min.

Measuring interval Continuous measurement

Current output (passive) 4-20 mA (scaleable by HART®) galvanic isolated. Max. load 750 ohm @ 30 V d.c.

Cable 4 metres (4×1.5 mm2 shielded cable)

Enclosure rating IP 68 to IEC 529

Ambient temp. Storage: 0 to +50°C, Operation: Air: -20 to +40°C, Medium: 0 to +35°C

Power supply 20-28 V d.c. 6A

Automatic calibrationwith internal standards Every 72 hours Every 96 hours Every 72 hours

Change of reagents Every 6 weeks Every 6 weeks Every 6 weeks Every 13 weeks

Approvals CE and C-trick approval, Emmision: EN 50081, Immunity: EN 50082

Enclosure material PUR and stainless steel (AISI 316)

Weight/size 15 kg/height: 600 mm, diameter: 350 mm

Mounting Bracket for INSITU transmitterDescription Top of the basin wall or inside basin wall mounting. Incl. roller carriage and hoist

Material Stainless steel (AISI 316), galvanized hoist

Weight/size 15 kg/height: 3000 mm

Carrier

Reagent

Waste bag

Reagent

Standards

Ion filter

Photometer

Communication

S I M P L E • F L E X I B L E • C O S T - S A V I N G

Handling signals from EVITA® OXY or EVITA®

INSITU transmitters is as simple and user-friendly asthe measurement process itself. Flexibility is key,based on three different versions of the USC univer-sal signal converter, all sharing a common platform:

• USC 5000: a basic cost effective signal converter,enabling digital HART® communication with onetransmitter. It features a user-friendly display andkeypad as well as a built-in air pressure transducerwhich automatically compensates the oxygen read-ing for installation altitude and barometric changes.The converter has one current output (4-20 mA)for auxiliary equipment.

• USC 6000: a high performance converter for onetransmitter. Thanks to two current outputs it offers

both primary and secondary measuring parameters:typically oxygen/nitrate/ammonium/orthophosphate contents are the primary value, while temperatureor time to change reagents are the secondary values.Moreover, the USC 6000 comes with three pro-grammable relay outputs for e.g. alarm, limits or setpoints.

• USC 7000: a top of the range multidrop signalconverter, able to communicate with up to 15transmitters on the same two-wire HART® bus,whether EVITA® OXY or EVITA® INSITU. Thedevice comes with four current outputs and fiverelay outputs. This solution is extremely cost-saving for applications with many transmitters, butonly requiring one signal converter. Not only areinitial costs reduced; simpler wiring cuts downinstallation time substantially.

USC signal converters communicate digitally withthe connected transmitters via a standardizedHART® protocol. All it takes is a two-wire cable,making installation really easy.

Irrespective of type, all USC signal converters havethe same logical menu structure. So if your demandfor functions increases, an upgrading from e.g. USC6000 to USC 7000 will mean no surprises regardingoperation. Moreover, the replacement is performedsimply by loosening two screws.

Modular FlexibilityPredicting the communication protocol of the futureis risky business. That is why Danfoss equipped itsUSC signal converters with a module option, offeringyou the following flexibility:• You can choose the communication module that fits

your needs today and change it later when new pro-tocols are developed.

• Individual modules with different communicationprotocols can be mounted in the USC 6000/7000signal converters simply by clicking them onto thebottom.

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The USC 6000/7000 signal converters are availablewith a TMS (Tele Metric System) option module.This wireless monitoring module includes an embed-ded cellular phone, working with the GSM networkand enabling the transmission of alarm/error mes-sages in a SMS format to up to four mobile phones.Among the obvious receivers are plant managers,electricians and Danfoss.

Service Out Of The OrdinaryEVITA® OXY/EVITA® INSITU transmitters utili-zing the TMS option take a Danfoss service contractsteps ahead of traditional service contracts regardingmonitoring, backup and security. With a TMS module mounted in the bottom of the USC signal converter and a built-in antenna, you getthe following advantages:• An error is immediately forwarded by SMS or

e-mail to Danfoss – and up to three other mobilephones of your choice. The service can be cancel-led when you are off-duty.

• In many cases errors can be corrected via the phonewithout the call of a service engineer.

• Thanks to an EVITA® Dialog PC software you areable to manipulate a transmitter, e.g. initiate cali-bration, change calibration intervals, change mea-suring range etc.

• In case of power failure, the TMS sends a messageto the programmed phones (due to battery back-up). This feature is useful for meters in farawaypumping stations in the sewerage system.

• The TMS adjusts itself to the actual GSM networkthanks to a built-in real time clock which e.g. auto-matically updates at Daylight Saving Time chang-es. Consequently, all messages are accompanied bythe correct indication of time – irrespective of thedomicile of the meter.

• One single TMS module is able to monitor up to 15EVITA® OXY/EVITA® INSITU transmitters viathe HART® bus.

A C A L L F R O M Y O U R S I G N A L C O N V E R T E R

e-mail

SMS

4-20 mA

4-20 mA

4-20 mA

4-20 mA

USC 7000

HART®

×15

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Signal converter USC 5000 USC 6000 USC 7000Transmitter type OXY 4100/4150, INSITU 4100

No. of transmitters 1 (point to point HART® 1 (point to point HART® 15 (multi drop HART®

communication) communication) communication)

Current outputs One 4-20 mA, (galvanic isolated) Two 4-20 mA, (galvanic isolated) Four 4-20 mA, (galvanic isolated)Max. load: 800 ohm. Max. load: 800 ohm Max. load: 800 ohmOXY: OXY: OXY:• Oxygen concentration • Oxygen concentration • Oxygen concentration

• Temperature • Temperature INSITU: INSITU: INSITU: • Nutrient concentration • Nutrient concentration • Nutrient concentration

• Remaining reagent lifetime • Remaining reagent lifetime

Relay outputs None 3 relays SPST (48 V a.c./d.c. 4A) 5 relays SPST (48 V a.c./d.c. 4A) programmable for setpoints, programmable for setpoints,alarms, limits and timer alarms, limits and timer

Digital input One digital input 12-30 V d.c. Input impedance 6 kohm for INSITU calibration control

Display 3 line back-lit alphanumeric LCD displayOXY: INSITU: • Oxygen concentration • Nutrient concentration • Temperature • Remaining reagent lifetime in days • Remaining liftetime of OXY 1100 sensor in % • Event log with error messages • Time since last calibration • Pending errors • Event log with error messages • Time since last calibration • Pending errors • Remaining ion filter lifetime in days

Enclosure IP 67 for wall/pipe mounting IP 67 for wall/pipe mounting IP 67 for wall/pipe mountingIP 20 19” insert for rack/panel IP 20 19” insert for rack/panelmounting mounting

Ambient temperature Storage: -40 to +70°C, Operation: -40 to +60°C

Power supply 85-264 V a.c. 85-264 V a.c. 85-264 V a.c.50/60 Hz, 5-12 VA 50/60 Hz, 5-12 VA 50/60 Hz, 5-12 VA

11-30 V a.c./d.c. 5-12 W 11-30 V a.c./d.c. 5-12 W

Automatic calibration OXY 4100/4150: OXY 4100/4150: OXY 4100/4150:Compensating for temperature, Compensating for temperature, Compensating for temperature, barometric pressure barometric pressure barometric pressure (built-in pressure gauge), (built-in pressure gauge), (built-in pressure gauge), humidity and salinity humidity and salinity humidity and salinity

Approvals CE, C-tick CE, C-tick CE, C-tickEmission: EN 50081 Emission: EN 50081 Emission: EN 50081Immunity: EN 50082 Immunity: EN 50082 Immunity: EN 50082

Option modules TMS option module (Tele Metric System)Remote communication • Alarm/error monitor with SMS and e-mail service for up to 4 preprogrammed receivers

• Built-in real-time clock • 900 MHz GSM • Battery back-up

S P E C I F I C A T I O N S F O R A N Y A P P L I C A T I O N

The new USC signal converters for EVITA® OXYand EVITA® INSITU transmitters are available in avariety of versions depending on the need for output

signals, communication, place of installation and sup-ply voltages.

O X Y G E N C O N T R O L R E A C H I N G N E W L E V E L S

Oxygen control isn’t just oxygen control. The more accurate you measure, the better your aerationcontrol. That is why Danfoss recommends oxygen profile control:

Simple oxygen control systemThe reactor is equipped with one oxygen transmitternear the inlet. The transmitter controls the speed ofthe blower by a frequency converter with a built-inPID controller. The dissolved oxygen contents arecorrectly measured close to the transmitter, but thefarther away from it, the greater the fluctuations. Theconsequences are: • When the oxygen contents are too high, energy for

running the aerators is wasted. • When the oxygen contents are too low, the treat-

ment capacity of the reactor is insufficient.

Advanced Oxygen Profile Control SystemThe reactor is equipped with four oxygen transmit-ters situated in different positions. Each transmittercontrols a valve – each supplying air to the bottomaerators in the four sections of the reactor. The air issupplied by an blower which is controlled by a fre-quency converter with a built-in PID controller. Apressure transmitter measures the air pressure.Consequently, the oxygen contents are much morestable throughout the reactor – saving up to 30-40percent energy and achieving up to 30 percent highercapacity.

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USC5000/6000

USC7000

O2

O2

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies toproducts already on order provided that such alterations can be made without subsequential changes being necessary in specifications already agreed.All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

As a long-term manufacturer of equipmentfor wastewater treatment, Danfoss has pione-

ered the development of dissolved oxygenmeters, nutrient meters and the software required to

utilize the retrieved data in on-line control systems.

Our commitment to the business does, however, not stop with state-of-the-artproducts. All along, we have shared our global experience and applicationknow-how with people in the trade, thus contributing to a mutually rewardingpartnership.

Recently, we boosted these endeavours by publishing the book “Get more outof your wastewater plant”. Besides making up a comprehensive survey of theindustry – its history, methods and techniques – this unique publication offersplenty of inspiration, advice and hands-on guidance. Undoubtedly, it willbecome an indispensable tool for wastewater professionals in the years tocome.

If you should care for a copy of this tangible result of the Danfoss commit-ment, please contact your local Danfoss sales company.

EVITA® is a registered trademark of Danfoss A/S

T A N G I B L E C O M M I T M E N T

O P T I M U M C O N T R O L

O F T H E V I T A L C Y C L E

DKCFE.PB.300.A1.02 Produced by Danfoss G1 advertising agency 01.05.APH.CS-FRW.AO