https://www.kistler.com/SE/en/cp/reaction-torque-sensors-with-center-hole-4507a/P0001333
Reaction torque sensors with center hole | Kistler SE
The torque sensors are suitable for measuring a dynamic or quasistatic moment arround the sensor axle.
reaction torque sensorscenterholekistler
https://www.dwyeromega.com/en-nl/shaft-to-shaft-key-mount-reaction-torque-sensors/p/TQ402
Shaft-to-Shaft Key Mount, Reaction Torque Sensors | Omega
The TQ402 series has a stainless steel case and heavy duty mounting for positive, non-slip connections and long term reliability in industrial environments.
reaction torque sensorsshaftkeymountomega