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West Surrey Racing (WSR) has selected MTA series cable-extension transducers from Variohm Eurosensor to improve the gearshift indicator system on its FIA WTCC BMW 320si.

The sensors were delivered on the same day as the initial enquiry, in time to meet the deadline for FIA race approval, and installed and electrically interfaced to a simple dashboard display to indicate the selected gear from the gear stick position.

The compact miniature ’stringpot sensor’ from Celesco was chosen for its installation simplicity and robustness.

The 35mm diameter x 13mm thick sensor provided the distance measurement directly from the BMW’s H-pattern five-speed gearshift mechanism without the need to ensure precision alignment, with the integral spring-loaded stainless-steel cable simply connected to the gear stick.

The IP55-rated aluminium-housed unit was supplied on an optional mounting bracket that was fixed in a slightly offset position on the car chassis to ensure each gear position returned a different position reading.

WSR chose the smaller of two MTA models with a 75mm stroke and voltage divider (potentiometer) output powered from the car’s 12V DC supply.

The high duty cycle conductive plastic potentiometer has an essentially infinite resolution and very long working life.

It offers a full stroke accuracy of better than +/-0.4 per cent and repeatability of +/-0.02 per cent, providing more than adequate performance for the application.

With demanding applications in areas such as heavy construction equipment and agricultural machinery, the MTA series is suitable for the arduous environmental conditions that the BMW typically experiences throughout a race.

Variohm Eurosensor also supplies WSR with ride height position measurement solutions via its ELPM series linear slimline linear position transducers.

The compact rod-type ELPM provides stroke lengths up to 75mm in IP67-sealed housing.

Variohm Eurosensor

Founded in 1974, Variohm Eurosensor has been the leading single source supplier of sensors and associated electronic systems for over 40 years.
Variohm’s product portfolio includes sensors and transducers for; position, pressure, temperature and load. With a technical sales support team ready for new challenges, Variohm can ensure that the most suitable sensor will be selected for applications in any industry.

Based in Towcester, Northamptonshire, Variohm Eurosensor has been the leading single source supplier of industrial sensors and associated electronic systems since 1974.

With a technical sales support team, receiving regular product training, Variohm has the structure and financial strength to deliver technical support and quality service along with expert up-to-date advice on their entire product portfolio. Variohm’s ability to design, develop, source and deliver a vast range of sensor solutions means that the sales support team is able to work with customers throughout their entire project, enabling customers to influence how their products work.

Variohm’s aim is to provide an efficient, cost effective, flexible service to customers, irrespective of their size, business or geographical location.

Variohm Eurosensor are part of the Variohm Holdings Group. Variohm Holdings as an entity can provide products to suit any sensing application in any industry and is eager to use it’s combined knowledge and skills to solve new applications.

Variohm Eurosensor – Sensors and transducers manufacturer, distributor and supply chain partner
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Variohm Eurosensor’s range of products monitor: –Position, Load, Pressure and Temperature

Position sensors include rotary and linear sensors, cable extension transducers and inclination sensors. Available in various contacting and non-contacting technologies, including Hall effect, incremental and absolute encoders and laser measurement.

Load and force sensing; load cells from 1g to 1000t capacities, available in a wide range of mechanical sizes and designs to suit all applications. High speed bagging controllers, torque transducers to measure both dynamic and static loads, with various mounting and electrical connection options.

Pressure transducers and switches to measure absolute, differential and gauge pressure up to 5000 Bar. These sensors are available is a wide range of outputs and also standard and customised housing options, with IP ratings up to IP69K.

Thermistors and probes offering a wide temperature measurement range, with excellent interchangeability and stability which are also space and flight approved or medically approved where appropriate. Custom and bespoke solutions are available and many are manufactured or modified on site.

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