Michell Instruments Liquidew I.S Specifications

Process Analyzers

Liquidew I.S.

Moisture in Liquid Analyzer

On-line measurement of moisture content in liquids is accurate, fast and reliable with the
Liquidew I.S. Moisture in Liquid Analyzer from Michell. A wide variety of non-polar liquids can
be measured continuously, on-line, including fl ammable liquids and hazardous area applications,
petrochemicals, power industry and pharmaceutical manufacturing.

Highlights

• Simple, cost-effi cient operation and low maintenance

• Retrofi t functionality, easy to integrate into existing
sampling or distribution systems

• High integrity moisture in liquid measurement from

0.01 ppm

• Multi-channel with up to four completely independent
measurement channels

• Robust design for undisturbed operation in many
non-polar liquids over a long time

• Two 4-20 mA confi gurable outputs and digital
Modbus RTU-based communication

• Replaceable sensor element with Michell Calibration
Exchange Service for reliable cost-effi cient calibration

• NIST and NPL traceable calibration

• EExd version available

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to saturation point

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Applications

• Naphtha feedstock to isomerization catalyst

• Hexane solvent in HDPE and LDPE process

• Benzene in styrene manufacture

• LNG LPG production and product checking

• Diesel and aero fuels to avoid liquid water phase
separation

• BTX process monitoring — benzene, toluene and
xylene

• Ethylene and proylene feed to polymer process

• Butadiene for the manufacture of synthetic rubber.

Process Analyzers

Michell Liquidew I.S.
Moisture in Liquid Analyzer

Michell Liquidew I.S. moisture in liquid analyzer provides a
complete solution for accurate, on-line moisture measurement
in process liquids, and offers many advantages over sample
collection and laboratory analysis methods.

Continuous on-line measurement allows monitoring and
control of moisture conditions to achieve optimum effi ciency
for production or maintenance. Intrinsically safe sensors, with
a sampling system, can be installed in the hazardous zones to
minimize sample transportation time and ensure a fast response
to process moisture changes. The rack-mounted Liquidew I.S.
Control Unit, which is conveniently located in a safe area,
provides real-time display of moisture content, user settable
alarms as well as analog output and digital communications.

The Control Unit is connected to the sensors/sampling system
in the fi eld by standard instrument pairs cable, so existing cable
runs can often be used where Liquidew I.S. is installed as a site
retrofi t.

The Control Unit in multi-channel MCU format can also
include moisture in gas analysis function by combining with
Promet I.S. Moisture in Gas Analyzer.

Accurate on-line moisture measurement in liquid

Michell’s Calibration Laboratories are world recognized through
the UKAS accreditation scheme under the auspices of EAL
(European co-operation for the Accreditation of Laboratories).
Each sensor is calibrated and certifi ed traceable to the humidity
standards of leading international metrology institutes, NPL
(UK) and NIST (USA), so assuring correct measurement of the
moisture in your process.

Certifi ed Intrinsically Safe

Liquidew I.S. sensors and sampling systems are designed for
fl ammable and non-fl ammable liquid within hazardous areas.
ATEX certifi ed by EECS for use in hazardous areas to II 1G EEx
ia IIC T4. Complete packages conforming to NEC Class 1 Div 1
or IECEx certifi cations are also available. Liquidew I.S. carries
GOST pattern approval and GOST Ex.

Flexible confi guration. Total analyzer system tailored
to specifi c customer requirements

Liquidew I.S. is available in a multi-channel format (MCU).
This MCU enables up to four measurement channels within
a single 19” sub-rack unit. The sister product for moisture
in gas analysis, Promet I.S., can be combined together with
Liquidew I.S. into an MCU to enable both gas and liquid
samples measurement with a single analyzer system. With the
MCU, each measurement channel functions independently, so
that any maintenance on one channel will not affect the others.
Customers can also order blank channels for future expansion.

The Liquidew I.S uses the rugged Easidew PRO I.S. sensor,
allowing the transmitter to be installed directly outdoors.

Channel connectors on back of MCU

Features

Reliable

Michell’s Thick- and Thin-fi lm Ceramic Moisture Sensor is
exceedingly durable; chemically inert materials coupled with
physical resilience provide long-term reliable service in liquid
phase measurements.

The robust construction prevents Michell sensors from damage
caused by dense liquid fl ow or even pressure shocks from rapid
process pressure changes during start-up and maintenance.

Easy to use with complete functionality

The 19” sub-rack mounting Liquidew I.S. Control Unit provides
complete operational functionality. The bright alphanumeric
LED display with auto-scale function gives measurement
values across six orders of magnitude, from sub-ppm levels
to saturation conditions. There are pre-set saturation constant

) values of most common hydrocarbon liquids for moisture

(C

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calculation, together with 2 user defi ned liquids and ability to
mix any 2 liquids from the list, so the user has the fl exibility
to select or enter the appropriate liquid profi le for the specifi c
application.

Four user-adjustable alarm points and two analog 4-20
mA outputs are provided as well as a digital RS485 RTU for
connection to external devices.

Simple to maintain with a sensor calibration exchange
program

For Liquidew I.S., calibration maintenance is simple. The unique
Michell Calibration Exchange Service offers fast, world-wide
delivery of replacement ceramic sensors certifi ed traceable to
metrology standards of NPL and NIST. As the calibration data
for the sensor is factory programmed into on-board non-volatile
memory, fi tment of a Calibration Exchange Sensor renews the
calibration, with minimal down-time. No programming or data
input is required by the user to complete the calibration process.
The Calibration Exchange Service facilitates a professional,
scheduled user QA programme at a lower cost than a traditional
‘return to manufacturer’ re-calibration service.

Retrofi t ready

If customers or system integrators wish to use their own
sampling systems, the analyzer solution can easily be integrated
into any existing sampling or distribution system offering an
extremely cost-effi cient, low-maintenance, multi-channel
solution that can be cascaded to any number of channels.

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