Rsens

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Rsens™: ...guessing to knowing

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Unless your compressor is fitted with our revolutionary Free Floating Pistons™,

you are probably familiar with the problem of rider ring wear and the need for

frequent maintenance shutdowns. While uncomplicated, replacing a set of rider

rings is time-consuming and expensive. You also face the challenge of shutting

down the compressor at the right time. Too early and you’ll replace the rider rings

before they’re fully worn, too late and the piston will damage the cylinder liner.

Rsens™: To maximise compressoruptime and reliability...

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To minimise the risk of guessing, many operators fit their compressors with a rider

ring monitoring system. However, because these systems (rod drop) measure the

vertical displacement of the piston rod, their measurement data is distorted by

variables. In practice, this translates to poor predictability and unnecessary ghost

alarms. Following years of research, we are delighted to announce a system that

overcomes these and other shortcomings: Rsens™.

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T H O M A S S E NC O M P R E S S I O N

S Y S T E M S

Fact 1: Sensor can be retrofitted to the existing reciprocating compressor

The Thomassen Rsens™ system literally approaches rider ring monitoring from

a different perspective. The system’s failsafe, solid-state sensor is mounted inside

the cylinder head-end cover, where it enjoys a direct view of the piston. The probe

is completely insensitive to contamination, and will endure the most gruelling

operating conditions. It will also survive explosions, pressures in excess of 250

bara, corrosive chemicals and acid gases. All electronic components are located

outside the cylinder, where they are easily accessed, even if the compressor is

running. The Rsens system has been extensively tested in simulated and

production environments. Despite its ruggedness, the system is accurate to 0.1mm.

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Introducing Rsens™

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5Fact 2: Failsafe, solid–state sensor in NACE compliant housing


S Y S T E M S

Our highly innovative Rsens™ system allows you to control and coordinate

compressor shutdowns with unprecedented precision. Like our Free Floating

Piston™, Rsens™ maximizes compressor uptime while reducing total cost of

ownership.

Rsens™: ...guessing to knowing, high MTBM, low investment

Should you require additional information, please get in touch with your local

representative or contact us directly via [email protected].

The bottom line... R™


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S Y S T E M S

Fact 3: Maintenance predictability is significantly improved

Advantages of condition based maintenance

• Makes optimal use of components,maximizing the operator’s cost/benefit ratio

• Allows maintenance shutdowns to be timed with precision

• Saves costs by reducing the number of shutdowns

• Avoids premature shutdowns or compressor damage

• Reduces the environmental impact of your plant (on account of fewer shutdowns)

Rsens™: features & benefits

• Failsafe, solid-state sensor inNACE compliant housing

• Exceptionally accurate (0.1mm) and reliable

• No key phasor required• Short payback period• Sensor can be retrofitted to an

existing reciprocating compressor• Onsite calibration for piston

material• Can be used in combination

all diameter pistons• Maintenance predictability is

significantly improved• Successfully tested under

extreme operating conditions

Rsens™ versus conventional monitoring systems

The reliability and accuracy of existing monitoring systems is influenced by the following variables,none of which affect Rsens™:• Thermal differences between

the piston head and the cylinder• Variations in crosshead clearance• Rod bending as a result

of piston tilting• Lateral rod vibration• Faulty sensor alignment• Rod wear in the stuffing box

running section• Unpredictable calibration

over the length of the stroke

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Sensor

Design pressure 250 bar

Testpressure 350 bar

Measuring range 0.1 - 5.0 mm

Maximum operating temperature 150 C

Minimum operating temperature -60 C

Classification Ex II 1G Ex ia IIC T4

Ex and ATEX classification:

IEC 60079-0 (general)

IEC 60079-11 (intrinsic safety)

IEC 60079-25 (intrinsically safe systems general)

EN 50014-0 (general)

EN 50020-1 (intrinsic safety)

EN 50039 (intrinsically safe systems general)

Signal processing unit

Ambient temperature maximum 60 C

Ambient temperature minimum -40 C

Classification CE (ATEX)

Output signal 4 - 20 mA

Supply voltage typical 24V DC

Explosion zone 0 and 1

Shock Rating 100 g (single hit)/IEC standard

68-2-27 (survivability)

Vibration Rating 5 g/10-150 Hz/IEC standard 68-2-6

Rsens™ Technical data

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Head Office

Havelandseweg 8-a

PO BOX 99

6990 AB Rheden

The Netherlands

Tel: + 31 26 4975200

Fax: + 31 26 4975201

E-mail: [email protected]

www.thomassen.comFor Service Operating Companies, Sales Offices & Agencies, please visit our website.

Thomassen Compression Systems

Rsens

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