FUTEK logo Featured Product - QMED 4 - October 2016
Minimizing Patient Trauma with an Automated Thoracic Retractor

Traditionally, opening a patient's thoracic wall requires fast movement and consistent torque to minimize trauma. This is accomplished with a hand cranked thoracic retractor operated by the surgeon. Utilizing this methodology, current loops are typically applied in place of a torque sensor to monitor torque when automating small systems. However, this setup offers poor accuracy and a non-linearity of ± 5–10%. Needless to say, a new, more precise platform is needed.

Here we have replaced the hand crank with a miniature, high-precision, brushless DC servo motor and gearhead. Alongside the DC servo motor is FUTEK's QTA141 Micro Reaction Torque Sensor, which has accuracy and non-linearity of ± 0.5%. Adopting this setup provides the surgeon with a faster and more accurate torque feedback system, in addition to benefiting the patient with less time spent in the operating room, a reduction in potential bone fractures, and a more rapid recovery time.


Download Spec Sheet   Request Quote

QTA141 features

  • 1 N-m Capacity
  • 1.3 mV/V Output
  • 0.86" Diameter, 0.39" Height
  • 150% Safe Overload
  • ± 0.5% of R.O. Nonlinearity and Hysteresis
  • ± 0.2% of R.O. Nonrepeatability

Consult factory for customization. We highly encourage and welcome your team to use FUTEK resources as a partner for OEM projects to save resources and add value to your organization.


FUTEK's QTA141 miniature torque sensor provides high accuracy, strain gauge, torque measurement in a 0.86" diameter by 0.39" height package.

The QTA141, miniature servo motor, and gearhead with supporting electronics. FUTEK’s IAA series amplifier sends an amplified signal to the motor controller for closed loop control.

FUTEK’s QTA141 torque sensor integrated with the miniature DC servo motor and gearhead. The drive shaft passes neatly through the sensor, allowing for easy coupling.

FUTEK Privacy Policy