Value for money
18 September 2012
The Type 4520A contactless torque sensor from Kistler costs less than £1500, the same as many slip-ring types, and is said to be exceptionally robust and very low maintenance.
Noncontact, frequency modulation signal transmission, used to transmit the torque signal from the rotating shaft, is said to virtually eliminate 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 10,000rpm is combined with a maximum overload capacity of 150%.