Pulley Torque Transducer

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Accurate torque control and measurement are key components in maintaining the effectiveness, efficiency and safety of rotating machinery. Without reliable torque measurement, rotating components may operate inefficiently, be exposed to loads in excess of their capability or require more frequent maintenance. Each of these conditions may lead to process failure, production delays, safety hazards and unplanned downtime.

With a pulley torque transducer from S. Himmelstein and Company, you can avoid these scenarios thanks to our unique design and commitment to quality. We offer two options for pulley torque transducers, the 31200T and the 3120TA, with the 3120TA capable of higher performance and increased rotational shaft speeds — up to 7500 rpm.


Pulley-style torque transducers and sprocket-style torque transducers are designed to transfer rotational information from the shaft to the transducer using a pulley connection. Through the pulley, the transducer converts torque into an electrical signal, which can then be read, stored and monitored with a local display and/or communicated to a computer. Torque transducers are generally used for:

  • Industrial testing of rotational elements
  • Machinery monitoring for predictive and preventative maintenance
  • Process monitoring and control for mixing or roll applications
  • Automatic shutdown to prevent damage to equipment and components


Pulley torque transducers from S. Himmelstein and Company offer several features to meet your needs. These include:

  • Torque capacities from 50 to 1,500 lbf-in (5.65 to 170 Nm)
  • Overload capacity up to 250%
  • Maximum shaft speed of 5000 rpm (31200T) or 7500 rpm (3120TA)
  • Simple mounting, without pillow blocks, jack shafts or flexible couplings
  • Non-contact, brushless design
  • Noise hardening for VFD applications
  • 6-digit display
  • +/- 10V analog output
  • Remote calibration

These features offer many benefits and advantages, which are described in greater detail below.

Advantages of Pulley Torque Transducers

Designed by S. Himmelstein and Company for maximum effectiveness and minimal maintenance, pulley torque transducer advantages include:

  • Installation in small spaces, without pillow blocks or couplings
  • Installation torque errors are avoided thanks to simple mounting
  • Sensor design cancels out belt/chain and clamping loads
  • Noise-free rotary transformers
  • Non-contact coupling to the stator
  • Immunity to lubricants and most hostile environments
  • Strain gages and torsion element are fatigue rated
  • Brushless coupling ensures little to no maintenance over the life of the transducer
  • Hardened to noise from adjustable speed drives
  • ISO 17025:2017 accredited, NIST traceable calibration
  • Additional services to install pulleys and other components if necessary

To learn more about how S. Himmelstein and Company can fulfill your pulley torque transducer needs and improve your production quality, efficiency and safety, request a quote or contact us today.