1. Althensensors
  2. Sensors
  3. Torque sensors
  4. Reaction torque sensors
  5. ATF326 Reaction Torque Sensor

ATF326 Reaction Torque Sensor

Flange Mounted Motor Torque Transducer


Key features

  • Measurement range 0 - 20 Nm
  • Non-linearity 0.1 % RT
  • Output signal 2.1 mV/V or
    rationalized 2.0 mV/V ±0.5 %
  • Supply voltage 10 VDC, max. 20 VDC
  • -10 - +80 °C Operating temperature
  • Hysteresis: ±0.4 % RT


About the ATF326 Reaction Torque Sensor

The ATF326 fits between a motor and its mounting structure acting as a low profile coupling or adapter plate. The motor shaft passes through the center of the ATF326, the resultant torque reaction on the motor stator is equal and opposite to the shaft torque. Torque is transmitted from the motor stator through the ATF326 transducer to the earth structure or chassis.

This makes the ATF326 suitable for many process applications, examples are:

  • Bulk powder handling - mass flow measurement
  • Rheology - liquid viscosity measurement
  • Mechanical handling - conveyor belt drive torque

ATF326 transducers can be designed for most motor drive applications where the motor itself is static.

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Technical Specifications

Specification Value
Bridge resistance 700 Ohm
Compensated temperature range -10 - +50 °C
Creep, 20 min ±0.1 % AT
Environmental sealing Dust proof
Hysteresis ±0.4 % RT
Insulation resistance, minimum at 50 vdc 500 MOhm
Material Aluminium
Non-linearity, terminal ±0.1 % RT
Operating temperature range -10 - +80 °C
Rated output, nominal 2.1 mV/V
Rated output, rationalised 2 mV/V ±0.5 % RT
Rated torque 20 Nm
Repeatability ±0.05 % RT
Structural stiffness Range dependant
Supply voltage, max. 20 V
Supply voltage, recommended 10 V
Temperature effect on rated output ±0.005 % AT/K
Temperature effect on zero load output ±0.005 % RT/K
Weight (excl. cable) approx. 8.5 kg
Zero load output ±4 % RT

Related products

Need something else?

ATF315 Miniature Reaction Torque Sensor

  • Measuring range: 0 - 10 mNm to 0 - 5 Nm
  • Non-linearity 0.05 % RT
  • Output signal 0.2 - 1 mV/V
Datasheet View product