Dynamic and Static Torque Sensor: What is the different?
FUTEK offers both static (reaction) and dynamic (rotary) torque sensors, which are designed for different applications.
Introduction
Torque Sensors manufactured in US by FUTEK Advanced Sensor Technology (FUTEK), a leading manufacturer producing a huge selection of Torque Transducers, utilizing one of the most advanced technologies in the Sensor Industry: Metal foil strain gauge technology. It is is defined as a transducer used for torque measurement that converts an input mechanical torque into an electrical output signal. Torsions Sensors are also commonly known as Torque Transducer, Torque Cell or Moment Sensor. There are two main types of Torque Sensors: Reaction Torque Sensors or Rotational Torque Sensors.
Dynamic (Rotary) torque sensors
- Measures: Rotational torque on a spinning shaft, engine, or motor.
- Sensor type: Rotary torque sensors. These transducers are installed in-line with the spinning shaft.
- How it works: The sensor rotates with the shaft. It uses a slip ring, wireless electronics, or other non-contact methods to transmit the electrical signal from the rotating strain gauges to a stationary display.
- Best for:
- Performance testing on power tools, motors, and turbines.
- Auditing and analyzing the efficiency of test stands, including dynamometers.
- Measuring torque ripple in electric motors.
Static (Reaction) torque sensors
- Measures: Non-rotational or stationary torque.
- Sensor type: Reaction torque sensors. They are installed between the torque-producing device (like a motor) and a fixed, rigid surface. The sensor measures the force that "reacts" to the torque being applied.
- How it works: One side of the sensor is bolted to the ground, and the other is connected to the rotary element. The sensor's internal strain gauges measure the shear forces generated as the element attempts to rotate.
- Best for:
- Auditing the torque of fasteners with a miniature screwdriver.
- Checking the calibration of a torque wrench.
- Testing bearing torque.
- Measuring the stall torque of a motor.
How to choose a Torque Sensor for your application?
A question that we frequently hear is: “What is the right sensor for my application?” The reason why it gets asked so often is that it can be tricky to navigate the various sensor offerings on the market. So, be it a small torque sensor or a high capacity torque sensors (not a string potentiometer), make sure to follow the steps below for adequate torque sensor sizing.
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