Variohm Eurosensor - PRODUCT NEWS

Positek’s PIPS™ technology makes custom modification straightforward for high-temperature automotive position measurement application

Positek Limited, the leading UK displacement transducer manufacturer, recently completed the design and supply of a custom modified version of its PIPS™ equipped P103 series short stroke linear position sensor for a wastegate valve position feedback task on an advanced automotive turbocharger.

As part of a motorised control system that regulates and optimises peak engine performance, the compact pushrod style P103 is mounted near the direct flow hot engine exhaust gases where its specially designed thermal shield allows use at elevated temperatures of up to 160 °C at the inductive sensing element whilst the conditioning electronics remain at around 125 °C.

Positek’s patented PIPS inductive technology is based upon a simple, single coil design which facilitates straightforward customisation, often with the benefit of reduced lead times which in some cases can be as short as a few days. When compared with other available LVDT and magneto-strictive sensor types, PIPS based displacement sensors overcome problems such as bulky coils, poor length-to-stroke ratio or the need for special magnetic materials - and for simplified control they do not require separate signal conditioning. As there is no contact between the moving electrical components, the technology yields extremely long life when compared to potentiometer based equivalents. Even as standard components the robust technology has excellent resilience to shock and vibration with respective specification values of 10g (IEC 68-2-6) and 40g (IEC 68-2-29). These factors combine with typical IP67 protection ratings and full compliance to EN61000 for both susceptibility and radiated EMC.

For the wastegate valve application, the stainless steel housed P103 series sensor includes a special threaded mounting that aided compact installation for the customer as well as the standard options of spring-loaded pushrod and cable gland. The electrical characteristics combined a 4.5V DC calibrated output from a +5V DC supply. A wide range of alternative electrical options are available across the standard range along with mechanical options that include flange or body clamp mountings and free or captive push-rods.

The 35 mm diameter P103 series short stroke position sensor has any measurement range up to 50 mm (a version for longer measurements up to 100 mm is also available). With independent linearity to < +/-0.25% (< 0.1% option available) and with essentially infinite resolution and a low temperature coefficient, the sensor provides highly accurate and repeatable position measurement over a wide temperature range.

The P103 is part of a comprehensive range of linear, rotary and tilt sensors from the ISO9001:2015 designer and manufacturer which includes ATEX, IEC-Ex and CSA certification across many product lines. Positek’s sensors are widely specified and well proven in challenging environment measurement tasks including intrinsically safe, hazardous area, automotive, aerospace and submersibles as well as general industrial and scientific research applications.

About Positek Limited
Acquired by the Variohm Group in 2019, Positek Limited was established over 25 years ago and today operates as an ISO9001:2015 certified designer and manufacturer of linear, rotary and tilt sensors with several specialist quality standard certifications including ATEX, IECEx, and CSA for both sensors and galvanic isolation measurement amplifiers. With its own patented non-contact inductive position sensor technology the specialist enjoys a high reputation for a fast-turnaround standard range as well as customised sensors and transducers that are extensively used in intrinsically safe, hazardous, automotive, submersible and other challenging environment measurement tasks. The extremely robust and highly accurate technology allows linear position measurement up to 1500 mm or more with compact form factor angular position measurement capabilities from between 5° and 160°. Application areas include, but are not restricted to, oil & gas, mining, medical, marine, hydraulic & pneumatic cylinder position feedback, tilt sensing on construction and heavy machinery, and more.

About Variohm EuroSensor
Variohm EuroSensor is a manufacturer, distributor and supply chain partner providing complete sales and application support across a comprehensive range of position, force, pressure, load, and temperature sensor technologies - for demanding measurement applications across industry, construction, agriculture, motorsports, research and more.

About Variohm Holdings
Comprising four closely linked operating divisions, staffed by highly experienced motion and sensor application specialists with extensive knowledge of international standards; Variohm Holdings combines its considerable design and manufacturing capability with best of brand products and components from leading global partners to provide engineered solutions that are seamlessly and cost effectively integrated for your application.

For more information, please contact:-

Positek Limited
L6 The Link, Andoversford Industrial Estate, Cheltenham Gloucestershire GL54 4LB
Graham Pattison
Phone : +44 (0) 1327 351004

Williams' Barn, Tiffield Road, Towcester Northants NN12 6HP United Kingdom
Tel: +44(0) 1327 351004
Fax: +44(0) 1327 353564

September 2020

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