Products › Torque Sensors › Reaction Torque Sensor
WTQ17 Static Torque Sensor (Keyed, 0.2-5,000 Nm)
A reaction torque sensor measures torque on a stationary flange. It is bolted between a fixed frame and the device under test and reads the torque the casing reacts against, with no rotation and no slip rings. It suits torque-wrench calibration, motor and fastener bench tests, and any static torque check.
- Model: WTQ17 series
- Range: 0.2 N·m to 5,000 N·m
- Type: static (reaction)
- Mounting: key both ends
- Accuracy: ±0.1 to ±0.3% FS
- Output: 1.0-1.5 mV/V bridge
Overview
The WTQ17 series is a static (reaction) torque sensor with a key on both ends, covering a wide band from 0.2 to 5,000 N·m. It does not rotate; it holds against the reaction torque and reads it through a strain-gauge bridge.
It is the keyed wide-range member of the static line. For a turning shaft, use a rotary torque sensor; for the general static range, see the reaction torque sensor.
Features
What sets this reaction torque sensor apart on the bench:
Static reaction
Holds against the torque and reads it; nothing rotates.
Key both ends
A keyway on each end couples a shaft into a fixed frame.
0.2 N·m to 5,000 N·m
One series spans small bench torque to high reaction torque.
High accuracy
Non-linearity of ±0.1 to ±0.3% of full scale.
mV/V output
A 1.0-1.5 mV/V bridge signal, with amplified options available.
Overload protected
Safe to 150% and ultimate to 200% of full scale.
Working principle
The WTQ17 is fixed through the keyways, so the shaft does not turn. Applied torque is held as a reaction load, which strains a metal-foil bridge inside the body. The bridge gives a 1.0-1.5 mV/V signal in proportion to torque, and an amplifier can convert it to a current or voltage output. The same keyed design scales from 0.2 N·m up to 5,000 N·m by changing the element.
Technical specifications
| Parameter | Specification |
|---|---|
| Measuring principle | Static reaction strain-gauge, key both ends |
| Measuring range | 0.2 to 5,000 N·m (0.2-100, 200-1,000, 2,000-5,000 N·m) |
| Mounting | Key both ends, fixed |
| Sensitivity | 1.0-1.5 mV/V |
| Non-linearity | ±0.1 / ±0.3% FS |
| Zero output | ±1% FS |
| Hysteresis | ≤±0.05% FS |
| Repeatability | ≤±0.05% FS |
| Input resistance | 350 / 750 Ω |
| Insulation resistance | ≥5000 MΩ / 100 VDC |
| Compensated temperature | -10 to 60 °C |
| Operating temperature | -20 to 65 °C |
| Excitation | 10-15 VDC |
| Safe overload | 150% FS |
| Ultimate overload | 200% FS |
| Material | Aluminum alloy (0.2-30 N·m); alloy or stainless steel (40-5,000 N·m) |
Models and ranges
Representative rated torques, key both ends:
| Rated torque | Mounting |
|---|---|
| 0.2-100 N·m | Key both ends |
| 200-1,000 N·m | Key both ends |
| 2,000 N·m | Key both ends |
| 5,000 N·m | Key both ends |
Range and mounting
Pick by range and how it mounts:
| Model | Range | Mounting |
|---|---|---|
| WTQ17 series | 0.2 N·m-5 kN·m | Key both ends |
| WTQ-120 | 5-200 N·m | Keyed shaft |
| WTQ-22 series | 50 N·m-10 kN·m | Key/square + flange |
| WTQ98 series | 0.2 N·m-50 kN·m | Flange both ends |
See the keyed static torque sensor, WTQ-22 series or reaction torque sensor.
Applications
- Torque calibration stands across a wide range
- Reaction torque on keyed test frames
- Static torque from 0.2 N·m to 5,000 N·m
- Motor, gearbox and actuator holding torque
- Assembly and quality torque verification
Challenge: A test lab needed one keyed static sensor family to cover everything from small bench torque to several thousand newton-meters.
Solution: WTQ17 units sized to each band, keyed into the rig at both ends, each reading reaction torque through its bridge to the readout.
Result: The keyed series gave the lab a common coupling style from small to high torque, so fixtures stayed consistent across the range.
Related products
FAQ
What is the WTQ17 torque range?
The series runs from 0.2 N·m up to 5,000 N·m, covering 0.2-100, 200-1,000 and 2,000-5,000 N·m.
How does it mount?
A keyway on each end couples the shaft into a fixed frame, so the sensor holds against the torque.
Is it static or rotating?
Static. It is a reaction sensor fixed through the keyways, so the shaft does not turn. For a turning shaft use a rotary torque sensor.
What output does it give?
A 1.0-1.5 mV/V bridge signal, with amplified current or voltage outputs available.
What is another name for it?
A static or reaction torque sensor. The WTQ17 is the keyed wide-range version.
Request a quote
Tell us the torque range, the mounting style and the test, and we configure one reaction torque sensor for your bench, not a shelf part. Send the details and our engineers reply with a specification and quote.