Rotary sensor
May 1st 2009 Variohm EuroSensor offers noncontact
multiturn angle sensors based
on Nobel Prize winning
technology. They are
said to offer improved
resolution, better
repeatability and longer
life than contact-based
potentiometer devices, and
to have lower costs than
absolute optical
encoders.
RSM 2800 from Novotechnik is a
28mm dia sensor giving a 12-bit
absolute position resolution over a
selectable range of up to 15 turns
(5400°). There is a choice of voltage
or current output as standard; a
digital version with 0.1° resolution is
also available.
The sensor uses Giant Magneto
Resistance Effect and, to
provide an absolute position
value over a multi-turn
range, a 360 º Hall Effect
sensor is included with
multiple spiral arms
that correspond to
each rotation.
Temperature range is -40 to
85°; 125°C on request. More articles from Variohm Eurosensor Ltd: | 
