The Type 4520A contactless torque
sensor from Kistler costs the same as
many slip-ring types, and is said to
be exceptionally robust and very low
maintenance. Non-contact,
frequency modulation signal
transmission, used to transmit the
torque signal from the rotating shaft,
virtually eliminates wear, leading to a
long life, even in continuous use
applications. A TTL speed signal at
60 pulses/rev and an external 100%
range check input are provided as
standard.

Ten models are available with
rated torque from 1 to 1000Nm each
with industry standard ±10 V signal
output. Class 0.5 accuracy at speeds
of up to 10,000 rpm is combined
with a maximum overload capacity
of 150%.