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Sealed rod type linear position sensor for harsh environments

28 July 2010

Variohm EuroSensor has introduced a range of heavy duty, sealed linear position sensors for extreme operational environments. The new LWX series from Novotechnik builds upon the successful LWG rod actuated potentiometric design with additional sealing to IP67 protection rating and features a new patented pressure equalisation technology that prevents 'pump effect' pressure build up.

Aimed at extended life and high reliability linear position measurement applications in construction equipment, agricultural machinery and severe industrial automation environments, the LWX series is available in various electrical stroke lengths up to 750 mm, providing absolute measurement with resolution to 0.01 mm and linearity up to 0.04%.

The all-metal design includes a sturdy anodised aluminium housing with a stainless steel actuator rod supported in twin bearings with a backlash-free pivot head mounting on rod and body ends that allows up to +/- 12.5º free movement. The fully sealed unit is rated for 50 million movements and will suit operation in extreme environments including high pressure washdown, water, oil and other contaminants

Novotechnik's unique conductive plastic resistance element technology features specialised multiple printed ink technologies with multi-fingered precious metal wipers in a  unique elastomer damping mechanism that maintains complete and even contact even under the most arduous shock and vibration conditions. The LWX series environmental specifications include a vibration rating from 5 to 2000 Hz at up to 20g, and shock rating to 50g for 11 ms.

The LWX series is part of a wide range of Novotechnik contacting and non-contacting linear and angular position sensors available exclusively in the UK and Ireland from Variohm EuroSensor. Fully sealed and open designs are available with a numerous mounting styles and grades of precision including dual redundancy versions. Customised designs can also be supplied as part of Variohm's specialised service.


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