New angle sensors with no wearing parts

Jon Lawson

Variohm EuroSensor has added two non-contacting models to its range of high accuracy angle encoders. Both are from Variohm´s Swiss distribution partner, Contelec AG, and feature separate magnet and sensor components for continuous rotation in a two-part design that requires no mechanical bearing or joint - and with no wearing parts and IP68 protection class, they offer an effectively a long mechanical working


Whilst these angle encoders offer a wide choice of extreme environment application solutions for precision angular measurement, they are
differentiated by their respective housing designs. The Vert-X-31E has a flat moulded plastic sensor housing with 38mm fixing centres that suits
installation in height constrained areas whereas the 22mm diameter cylindrical aluminium housing of the Vert-X-22E will suit placement in
cramped areas where radial space is severely restricted.

The sensors have a standard 360⁰ electrical angle with the possibility of factory-set custom angles - normally in 30⁰ increments although special
angles may be supplied for OEMs. For certain electrical output models, user-programming with Contelec´s Commander software provides application adaptation of output characteristics such as angle range, index points and direction of rotation. This flexibility can also benefit end-users by a reducing the number of uniquely specified angle encoders required for a particular machine application. User programmability is also advantageous for minimising customer stock levels and makes field replacement more straightforward.

Vert-X22E output options include ratiometric, voltage, current, PWM and SPI from 5V or optionally 24V input. The Vert-X31E includes all these
output and supply options as well as SSI and incremental encoder. Throughout these options the resolution is typically between 12 and 14
bits or up to 1024 PPR for the incremental version. Some output types also include dual redundancy for added safety.

The IP68 sealed components for both models offer exceptional levels of reliability and endurance as well shock and vibration and, in particular for the fully encapsulated 31E, an outstanding resilience to humidity, damp and dust. The two-part design has been extensively proven in use for
steering, guiding or angle position on heavy duty machinery such as agricultural, mining or construction equipment, and other applications
where extreme environment conditions exist and accurate measurement is required.