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Engine

Monitoring

Pressure Sensors for

Monitoring on Diesel

and Gas Engines

CopyrightWrtsil

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Pressure Sensors from IMES Long life and Precise

Going back to 1996, IMES was formed

to exploit the excellent performance and

longevity of its robust cylinder pressure

sensors employing TION thin f ilm

measuring technology. Our sensors are

a t t he h ea rt o f a ll o ur p ro du ct s

associated with cylinder pressure

measurement and are now in their

fourth generation.

They are affordable and their robustness

and performance has been proven in

many applications. As a result, standard

effective l ife is more than 16,000

operating hours on both Diesel and Gas

Engines. On this basis we believe theyoffer the best combination of robust

ness, reliability, price and above all

accuracyavailableonthemarket.

IMES pressure sensor type HTT04 hastype approval certificate from Bureau

Veritas (BV) and from Det Norske Veritas

(DNV) for Marine Engines . Other type

approval certif ications are in pre

paration.

For Gas Compressor application the

HTT04 sensor fulfilled ATEX 95 re

quirements for explosion proof zone.

TION measuring cell of IMES pressure sensors

Comparison to water cooled piezoelectric reference sensor

Type approval certificate from Bureau Veritasfor HTT04 sensor

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for closed loop control applications on Engines

HTT04 cylinder pressure sensor

CPS01 cylinder pressure sensor

The most commenly used sensor type is

the HTT04 sensor wi th thread

M14*1,25. The HTT04 sensor head is

available with different tube length and

different cable lenght between sensor

head and signal condition unit (SCU).

Important operating data are stored in

the SCU and can be read via serial inter

face. More than 25.000 sensors are

delivered for different closed loop

control applications.

The CPS sensor with M10x1 thread is

designed for application on medium

and high speed Engines. The CPS

sensor is installed at cylinder head,

where heat can be dissapeated by the

cylinder cooling system. The sensor has

been designed for minimum 16.000

operatinghours.

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Instruments for combustion monitoring

EPMXP instrument case incl. all components

Application on MAN B&W two stroke enginebuilt under license by Kawasaki Heavy Industries

Designed for periodic monitoring of

cylinder pressure on Diesel Engines, the

Electronic Indicator EPMXP device can

record cylinder pressure values on a

maximum of 20cylinderson twostroke

Diesel Engines operating at speeds of

40 to 300 rpm and on fourstroke

medium and high speed Diesels with

ratedspeedsfrom200to1500rpm.

Central to its performance is the provenaccuracy, reliability, longevity and cost

effectiveness of IMES' advanced

pressure sensors employing TION thin

film technology.

The EPMXP has proven considerably

simpler and more accurate than with

mechanical engine indicators. After

acquisition recorded data can be

downloaded immediately to a PC or

notebook via a USB cable and IMES

visualisation and data processing

software used to process the data at

leisure.

Transmitting the data by telephone line

or the Internet makes them available for

expert analysis. An optional software

upgrade allows power calculation of

every cylinder.

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on 2 and 4 stroke Diesel and Gas Engines

WECS

ECS

CMS Cargo Box incl. all components

Engine room of Wrtsil 12 Rtflex 96 electronically controlled twostroke engine

CMS Cargo Box allows pressures on up

to 20 cylinders to be monitored and

based on the data acquired engine

o p er a t i n g p a ra m et e rs s e t a n d

optimised.

With a special emphasis on dualfuel

Gas Engines, CMS Cargo Box targets

both power plants and Dual Fuel Diesel

electric (DFDE) propulsion and onboard

power generation systems on LNGcarriers and, if current concepts

become reality, cruise ships.

A part icular emphasis on modern

engines with common rail fuel injection

or advanced gas admission is balancing

ofcylinderoutputs.

Another application of CMS Cargo Box

is the use on two stroke, low speed

Diesel Engines in order to be able to

balance cylinder outputs better with

special emphasis on optimising valve

timing on the latest generations of

electronically controlled two strokes.,

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The IPT sensor for Compressor applications

Installation of an IPT sensor on a Kiene valve

The principle features of the IPT sensoris high accuracy, high pressure and high

resistance against vibration. FortheUS

market the IPT sensor has CUL ap

proval: Class 1, Div 2, Group D. The IPT

sensor for Compressor application is

composed of two primary parts, the

sensor head with his sensing element

and the signal condition unit (SCU).

The screenshot on the right side shows

the comparison of an IPT sensor to a

piezoelectric reference sensor with

excellent results. More than 2.000 IPT

sensors are installed on Compressor

applications.

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..and for injection pressure measurement on Engines

IPT injection pressure sensor with thread for

Butech valves

Another field application for the IPT

sensor is, for example: monitoring of

injectionpressureon fueloilpumpsof2

stroke Diesel Engines or pressure

monitoring of common rail injection

systemsofGasandDieselEngines.

In addition, the IPT sensor exhibits

excellent zero point stabil i ty. I t is

alternatively available with a current

outputof4...20mAoravoltageoutputof0...10Volt.