FEATURING:

THE NEXT GENERATION IN MAGNETIC LEVEL INDICATION

Why an MLI?

The Magnetic LevelIndicator is an alterna-tive to leakage-pronesight glasses, a tradi-tional but fragile meansto achieve visual indica-tion of liquid level.Unlike hard-to-read

sight glasses, Aurora’svisual indicator is highlyvisible. Maintenance onthe MLI, its transmitterand switches (if soequipped), can beaccomplished withoutbreaching the vessel.

Aurora’s singlechamber houses theEclipse sensor probeand a buoyancy float,the former providingcontinuous measure-ment and the lattermagnetically coupledto a visual indicator toprovide local levelindication.

A flag-type indicator(or a moving shuttle)visually indicatesliquid level. A varietyof measurement scalesand indicator flagcolors are available.

Introduced in 1998,Eclipse Guided WaveRadar quickly ascendedto its leading role inprocess level measure-ment. GWR is favored forits easy set up, trouble-free operation, measure-ment accuracy, andadaptability to a widerange of conditions.

The Eclipse transmitter continuouslyemits electromagnetic radar pulsesdirectly off the liquid surface. Theon-board electronics provide a real-time level output, in addition to theexternal visual indicator operated byAurora’s internal float.

Technology #1Radar Transmitter

The Aurora Magnetic Level Indicator (MLI) combines Eclipse®

Guided Wave Radar (GWR) and a float-actuated visual indicatorto simultaneously provide both continuous and local level indi-cation. So unique is Orion’s dual redundancy within a singlechambered MLI that Aurora has been granted a U.S. patent.

True Redundancy in a Single Chamber

Aurora MLI: Operating Principles

Baffle Plate.The sensorprobe areais separatedfrom thefloat area bya baffle plate.

2.

Visual Indication. The float positionedwithin Aurora’s chamber moves up anddown according to level changes. Thefloat contains an internal group of mag-nets that are “coupled” with magnets inthe flags of the visual indicator. As thefloat moves, the flags rotate to exposethe color of their opposite side. Theposition where the flag’s color changescorresponds to a point on the measuringscale indicating true level. (The optionalshuttle indicator moves parallel with thefloat to indicate level on the scale).

Baffle Plate. Aurora’s superb floatperformance is due in part to an angledbaffle plate mounted inside the chamber.The baffle plate �� partitions the sensorprobe area �� from the float area �� andserves as a guide to ensure smooth floattravel and proper indicator operation.Perforations along the baffle plate equal-ize pressure and allow free media flowwithin the chamber. The probe area ��also acts as a gas-bypass zone whenflashing occurs. This helps in preventingdamage to the float.

Optimum Float Performance. The Orion float has been engineered toprovide the world’s best MLI performance.

• The 360-degree vertical placement of themagnets assures proper coupling with theflag or shuttle of the indicator, even if thefloat is spinning in its chamber.

• The magnetic assembly creates aconstant Gauss rating optimized toensure reliable performance.

• Float magnets are designed to function at temperatures up to +1000° F (+537° C) for years of reliable service. Special floatalloys are available (see page 10).

FLOAT SECTION

�

CHAMBER SECTION

The custom float located insidethe chamber is magneticallycoupled to the visual indicator.The float rotates flags or movesa shuttle to indicate liquid tanklevel (as explained in moredetail at right).

FLAGS

SHUTTLE

Technology #2Vertical Float

3.

�

�

The Eclipse Transmitter

Description: The Eclipse Model 705 is a two-wire,loop-powered, 24 VDC liquid level transmitterbased on the revolutionary Guided WaveRadar (GWR) technology. The Model 705 can be used with all coaxial and single rodprobes specified for Aurora (see page 5).Eclipse is designed to provide measure-ment performance well beyond that ofmany traditional technologies.

Measurement Principle:Guided Wave Radar is based upon Time DomainReflectometry (TDR). Pulses ofelectromagnetic energy aretransmitted down the probeand reflected when theyreach a liquid surface.

Features:• Measures low dielectrics • Volumetric output• Quick connect/disconnectprobe coupling.

• IS, XP, and Non-Incendiveapprovals

Options:• FOUNDATION fieldbus™ digital output• PROFIBUS PA® digital output• LCD display and three-button keypad• Choice of coaxial and single rod probes • Aluminum or Stainless Steel enclosures• Remote-mounted electronics

4.

Power 24 VDCRange 6 to 240 inches (15 to 610 cm)Display 2-line × 8 character LCDResolution Analog: 0.01 mA

Digital: 0.01 unitsOutput 4–20 mA with HART® digital communication

(FOUNDATION fieldbus™ or PROFIBUS PA® optional)Response Less than 1 secondTemp Range -40° to +800° F (-40° to +430° C)Enclosure NEMA 4X/7/9/IP 67 ratingProcess Seal Complies with ISA 12.27.01Sensor 316 Stainless Steel, Hastelloy C®, or Monel®

Why Eclipse?

Low Maintenance:Eclipse is 100% electronic with no moving parts to wear out or replace.

E-Z Configuration:Simple configuration replaces calibration. GWR is bench configurable.

Ergonomic Design:Eclipse is compact and its user interfaces arevery easy to use.

Media Savvy: Eclipse tolerates high temp and pressure, steam, coating, acids, most foams, visible vapors, changing specific gravities and dielectrics.

Contact Measurement:Eclipse contacts the processdirectly, returning its signal from actual product level.

The wiring compartment (top) is safelyseparated from the electronics compart-ment (bottom). Simulated readout

Coaxial and Single RodSensor Probes

Eclipse accommodates a number of coaxial and single rod probes to satisfythe broadest range of appli-cation needs for Aurora thatinclude general purposeprobes and those designedfor optimum performance inhigh pressure, high tempera-ture, saturated steam andinterface measurement.

The coaxial probe is themost efficient of all probeconfigurations. Analogous to the efficiency of moderncoaxial cable, a coaxialprobe allows an almost unimpeded movement of the high frequency pulses.

The single rod probe ismost efficient where viscousmedia builds-up on theprobe (left). The dynamics of the single rod radar signal is such that it will read leveloff the actual liquid surfacerather than the top of thebuild-up. The single rodprobe is effective in manyheavy crude and hydrocarbonapplications.

Eclipse’s 7XT Coaxial Probe provides accurate interfacemeasurement when workingin tandem with an Aurora MLI

7XA: Ge

neral Pu

rpose C

oaxial

7XD: HT

HP (Hig

h Temp

erature

/High P

ressure

) Coaxia

l

7XP: HP

(High

Pressu

re) Coa

xial

7XR: Ov

erfill C

oaxial

7XS: Sa

turated

Steam

Coaxia

l

7XT: In

terface

Coaxia

l

7XJ: HT

HP (Hig

h Temp

erature

/High P

ressure

) Single

Rod

7X1: Fl

exible S

ingle R

od

COAXIAL

SINGLE

ROD

Transmitter Probe Selection

5.

Choosing the right probe is among the most importantdecisions in the specification process because the probe establishes the fundamental performance characteristics unique to the application.

Common Applications:

• Alkylation Tanks

• Blowdown Tanks

• Boiler Drums

• Condensation Tanks

• Deaerators

• Feedwater Heaters

• Flash Drums

• Gas Chillers

• Hot Wells

• Industrial Boilers

• Oil-Water Separators

• Propane Vessels

• Storage Tanks

• Surge Tanks

• Vacuum Towers

Aurora at Work

Dehydration Vessel Steam Drum

Storage Tanks Fermentation Vessel

From routine to critical applications, Aurora measures a wide range of

liquids in a broad array of vessels and process conditions. With its robust

construction, its ability to measure continuous or interface level, and its

tolerance for harsh conditions, Aurora is ideal for the toughest industrial

challenges. Aurora provides accurate measurement in environments with wide

temperature and pressure swings, cryogenic temperatures, and vibration.

It measures liquids that are aggressive, environmentally toxic, noxious to

personnel, flammable or explosive, and with low dielectric constants.

Suitable for a wide range of tanks, liquids, and conditions

| Onshore/Offshore Oil & Gas | Thermal & Nuclear Power | Pharmaceutical & Biotech | Refining | Petrochem | Wastewater | Chemical Processing

Aurora Applications6.

SIDE / BOTTOMShown on a feedwater heater

Aurora’s Most Common Tank Configurations:

SIDE MOUNT Shown on a storage tank

7.

Surge Drum Neutralization Tank

Oil & Gas Platform

BioPharm Vessel

Alkylation Tank Fuel Oil Storage

Thermal GearSwitches • For critical applicationswhere measurement bymultiple technologies isessential, Orion offersoptional transmitters forlevel monitoring with thehighest degree of scrutiny.A Jupiter® magnetostrictivetransmitter is often usedwith Aurora’s Eclipse radar.

Transmitters Visual Indicators• High temperature andcryogenic thermal insula-tion blankets protect MLIsfrom temperatureextremes.

• Steam tracing or electricalheat tracing is availablewith or without insulationblankets.

• For cryogenic applications,visual indicator extensionhousings help maintainreadability by preventingice accumulation on theindicator.

• Choose from shuttle type orflag type visual indicators.

• Scales are available inEnglish or Metric, withvolumetric or percentagescales, in different colors,and in stainless steelconstruction.

• Precision engineeredswitches enhance themonitoring & controlcapabilities of Aurora.Available as snap action,pneumatic, or bi-stablereed switches.

Aurora AccessoriesSee page 10 for standard and custom options

8.

OES-100 OCT-400

Approvals

Aurora utilizes the latest in communicationsprotocols including HART, FOUNDAT ION fieldbusand PROFIBUS PA digital communication.Eclipse GWR can be equipped to detect overalllevel or interface level, and when used with aHART splitter, it can transmit two 4–20 mA signals.

Worldwide Applications

Diagnostics

Protocols

Orion has accumulated vast application knowl-edge and thousands of installations on six ofseven continents, and in many seas, gulfs andoceans. Orion’s direct-support offices aroundthe world provide customers with applicationsassistance.

Eclipse utilizes PACTware™ software, a device-independent graphics interface that enablesremote viewing of level position, review andconfiguration of all parameters, trending data(such as level, quality, loop, % output) and alldiagnostic conditions of the transmitter.

The Eclipse 705 transmitter has Intrinsically Safe, Explosion Proof, and Non-Incendiveapprovals (CSA, FM, IEC); and Intrinsically-Safe,Flame Proof and Non-Sparking approvals (ATEX).Eclipse is available with a Safety Integrity Level(SIL) 2 hardware suitability rating.

• Intrinsically Safe• Explosion Proof• Non-Incendive

TREND

Protocols | Diagnostics | Approvals | Worldwide Applications 9.

From routine material options to one-off customfabrications, Orion will build the Aurora MLI to suitthe precise needs of your critical application. Fromdevelopmental engineering to MLI commissioning

assistance, we’ll oversee the realization of thatspecial, one-of-a-kind solution. Contact yourOrion representative when you need an Aurorawith capabilities beyond the standard options.

Custom MLIs for your most demanding application challenges

Left: A triple-redundantAurora fitted with threetransmitters and specialcryogenic insulation.

Right: A custom Aurorawith a Magnetrol Tuffy®

level switch, insulationblanket, heat tracing, andJupiter Magnetostrictive transmitter.

Aurora’s Standard Options:

Chamber• Standard and custom chamber-mounting configurations• 15 different standard chamber materials• ANSI and DIN pressure ratings• 3" or 4" chamber diameters• Multiple process connection sizes and types• Chamber and flange insulation options

Floats• Float materials include metallics. plastics, and

composites such as fiberglass• Several materials available, including exotic alloys

offering increased corrosion resistance• High Pressure designs available• Magnetic Trap option prevents ferromagnetic particles

in a vessel from entering the chamber and interfering with float movement

Level Indication• Flag or Shuttle indicators• Choice of high-contrast flag colors• 12 different measuring scales including English or

Metric, with volumetric or percentage scales• Optional stainless steel scale construction.• Optional Gauge Glass mounted to side of chamber• Local LCD enables users to view configuration param-

eters, error messages, and live process variable data

Eclipse• Liquid Crystal Display• HART, FOUNDATION fieldbus, or PROFIBUS PA digital communications

• A selection of sensor probe types and materials• Aluminum or Stainless Steel transmitter housings• PACTware Diagnostic Software

AccessoriesAurora MLIs may be equipped with blankets, steam orelectric heat tracing, and frost extensions for cryogenicapplications. Additional transmitters include Reed Chainand Magnetostrictive technologies. Switch optionsinclude electro-magnetic and pneumatic switches.

Custom Solutions10.

JupiterTransmitter This 12-page

brochuredescribes thetechnology,

key features,applications and

specifications of the Jupiter

Magnetostrictivetransmitter.

An Orion technician activates PACTware on a drilling rig.

� Need more Orion MLI information?Download these informative brochures at

orioninstruments.com

EclipseInstallation

and OperatingManual

This 68-pagehandbook is the official

installation andoperating guide

for EclipseGuided Wave

Radar transmitter.

THE POWER OF INNOVATION

Tuffy®float-actuated level switch

Electric heattracing within athermal blanket

JupiterMagnetostrictivetransmitter

ElectricHeatTracing

Eclipse GuidedWave Radartransmitter

11.

2105 Oak Villa Boulevard, Baton Rouge, LA 70815Telephone: 225.906.2343Toll Free: 866.55.Orion (866.556.7466)Fax: 225.906.2344E-mail: info@orioninstruments.com

Copyright © 2011, Orion Instruments, LLP. All rights reserved. Printed in the U.S.A.Specifications subject to change without noticeOrion & Orion logotype, Aurora, Jupiter, Eclipse, and Tuffy are registered trademarks of Magnetrol InternationalPACTware is a trademark of the PACTware Consortium. FOUNDATION fieldbus is a trademark of the Fieldbus Foundation. HART is a registered trademark of the HART Communication Foundation. PROFIBUS is a registered trademark of PROFIBUS International. Hastelloy is a registered trademark of Haynes International. Monel is a registered trademark of the International Nickel Company.

Bulletin: ORI-101.0

Effective: January 2009