Variohm Eurosensor - PRODUCT NEWS

Displacement sensors

Image: Positek’s S115 series waterproof and submersible stand-alone linear position sensor

Positek’s PIPS™ technology simplifies multi-point displacement measurement for large-scale structural monitoring tasks

Positek’s PIPS™ non-contacting sensor technology, based on a simple, single coil design, delivers highly accurate and repeatable position feedback for linear, rotary and tilt displacement measurement.

A wide range of product variants and Positek’s extensive custom design capability combine to provide users with novel and cost-efficient measurement verification solutions across all branches of industry and science. One such application area is for linear displacement tracking as part of the structural monitoring systems that maintain safety in the harsh and extreme environments on bridges and other large construction projects.

Whether installed during construction and required for long term health monitoring or for shorter term structural degradation analysis for maintenance or refurbishment, Positek’s linear displacement solutions can provide compelling solutions when compared to other electro-mechanical displacement measurement technologies such as potentiometers or LVDTs. And, as alternatives to laser, fibre optic and ultrasonic displacement sensors, Positek’s cost-effective and highly durable range offers consistent measurement in the harshest environments – with IP68 and IP69 ratings in durable stainless-steel housings for straightforward installation without the need for additional protective equipment.

For displacement monitoring on road and rail bridges and similarly large structures, a typical complement of several individually mounted Positek sensors, such as heavy-duty S115 series push-rod variant, can be used to monitor the real-time displacement between critical structural elements. These 35 mm body diameter sensors provide continuous positional information via a wide choice of industry-standard electrical outputs with a calibrated proportional and absolute output-to-length ratio. This allows complete flexibility for the customer’s preferred data-logging or other instrumentation system, and there is no need for additional signal conditioning as is the case with more complex and costly LVDT sensors.

With environmental sealing to IP68 and 10 bar pressure endurance, the all-stainless steel S115 series benefits from straightforward mounting options that include M8 rod eye bearings and body tube clamps. The sturdy 12.6 mm diameter push-rod can be supplied free moving, captive or spring loaded in either travel direction. With its minimal overall body-to-measurement length, the compact sensor is easily installed. Customers can select a calibrated measurement range from 5 mm to 800 mm and the push-rod design can be custom adapted to accommodate large installed spans between the fixed and moving elements of the application. The S115 has a typical linearity specification of <±0.25% over a 450 mm measurement range and an effectively infinite resolution that allows real-time linear position detection of the smallest sub-millimetre structural movements.

With no contact between its moving electrical components, the sensor’s reliability and life is exceptionally high in comparison to potentiometer alternatives. With potential mounting sites needing to survive high humidity, driving rain and severe temperature extremes, the sealed IP68 rated sensors’ durability is further assured with respective shock and vibration specification values of 10g (IEC 68-2-6) and 40g (IEC 68-2-29). As with all other Positek sensors, a wide choice of electrical connection options is offered.

The UK-based ISO 9001-2008 qualified manufacturer’s comprehensive range includes linear, rotary and tilt displacement sensors based on its patented PIPS technology that are extensively used across a wide variety of industrial and scientific position measurement tasks. Along with custom design service, Positek also offer a range of ATEX- and IECEx-qualified sensors for structural monitoring and other measurement tasks for intrinsically safe installation.

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

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:-

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

April 2021

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