Products › Torque Sensors › Rotary Torque Sensors
Rotary Torque Sensors
Rotary torque sensors measure torque on a turning shaft, in line between a drive and its load. Our non-contact series transfers signal and power across an air gap, so there are no slip rings or brushes to wear, the sensor runs at high speed, and it reports torque, speed and power together. Pick by torque range and shaft speed below.
Rotary Torque SensorModel: WTQ-1050 / 1060 series
Range: 2 N·m to 2 kN·m
Speed: up to 15,000 rpm
Output: torque + speed + power
Micro Torque SensorModel: WTQ-1050D / 1050E
Range: 0.05 to 5 N·m
Variants: contact / non-contact
Best for: micro-motors, viscometers
Inline Torque SensorModel: N40B
Range: 50 N·m to 10 kN·m
Type: bearingless disc coupling, contactless
Speed: up to 30,000 rpm
Torque Sensor with EncoderModel: WTQ2500
Range: 0.1 to 5 N·m
Speed: up to 15,000 rpm
Encoder: built-in (angle + speed)
Pulley Torque SensorModel: WTQ2071
Range: 50 and 100 N·m
Speed: up to 12,000 rpm
Type: belt-driven pulley
Non-Contact Torque SensorModel: WTQ2051
Range: 5 N·m to 5,000 N·m
Speed: up to 15,000 rpm
No slip rings, maintenance-free
Dynamic Torque SensorModel: WTQ2050
Range: 0.1 N·m to 5 N·m
Speed: up to 8,000 rpm
Compact, non-contact
Square Drive Torque Sensor (WTQ-1010)Range: 5-1,000 N·m
Drive: square hole + square shaft
Output: mV/V, 4-20 mA opt
WTQ2050A Non-Contact (5-500 Nm)Range: 5-500 N·m
Speed: 8,000 rpm
Output: freq, 4-20 mA, RS485
WTQ-1055 Keyed Shaft (3-100 Nm)Range: 3-100 N·m
Coupling: keyed both ends
Output: mV/V, 4-20 mA opt
Choosing a rotary torque sensor
Match the sensor to your torque range and shaft speed. If the torque is on a stationary flange rather than a spinning shaft, use a reaction torque sensor instead.
| Series | Torque range | Max speed | Signal and mounting | Best for |
|---|---|---|---|---|
| WTQ-1050 / 1060 | 2 N·m to 2 kN·m | up to 15,000 rpm | OLED; torque, speed, power | General test benches and motors |
| WTQ-1050D / 1050E | 0.05 to 5 N·m | High-speed (E) | mV/V bridge | Micro-motors, viscometers |
| N40B | 50 N·m to 10 kN·m | up to 30,000 rpm | Bearingless disc coupling | Large or in-line drivetrains |
| WTQ2500 | 0.1 to 5 N·m | up to 15,000 rpm | Built-in encoder | Torque, speed and angle in one unit |
| WTQ2071 | 50 and 100 N·m | up to 12,000 rpm | Belt-driven pulley | Belt and pulley drives |
| WTQ2051 | 5 to 5,000 N·m | up to 15,000 rpm | Non-contact, no slip rings | High-range continuous testing |
| WTQ2050 | 0.1 to 5 N·m | up to 8,000 rpm | Compact, non-contact | Small low-torque drives |
| WTQ-1010 (Square drive) | 5-1,000 N·m | Bench / intermittent | Square hole + shaft, brush | Torque-wrench and tool testing |
| WTQ2050A (Non-contact) | 5-500 N·m | 8,000 rpm | Non-contact, freq + 4-20 mA | Mid-range drive and motor testing |
| WTQ-1055 (Keyed shaft) | 3-100 N·m | Bench / intermittent | Keyed both ends, brush | Small drive and gearbox bench tests |
Measuring torque on a stationary flange at 0 rpm? See reaction torque sensors.
FAQ
What is a rotary torque sensor used for?
It measures torque on a turning shaft, so engineers can verify the output of motors, engines, gearboxes, pumps and power tools on test benches and production lines. The shaft keeps spinning while the sensor reads live torque, and often speed and power as well.
Is a non-contact rotary torque sensor better than a slip-ring one?
For most modern test work, yes. A non-contact sensor has no brushes to wear, so it avoids brush noise and maintenance, runs at higher speed, and lasts longer. A slip-ring design can still be a lower-cost choice for low-speed or occasional use.
What torque range and shaft speed do these sensors cover?
The series spans 0.1 N·m of micro torque up to 10 kN·m, with shaft speeds to about 15,000 rpm depending on the model. Tell us your range and speed and we match the build.
Request a quote
Tell us the torque range, shaft speed and mounting, and we recommend a rotary torque sensor and send a quote.