Products › Torque Sensors › Reaction Torque Sensor
WTQ-22 Static Torque Sensor (50-10,000 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: WTQ-22 series
- Range: 50 N·m to 10,000 N·m
- Type: static (reaction)
- Mounting: key (or internal square) one end, flange the other
- Accuracy: ±0.1 to ±0.3% FS
- Output: 1.0-1.5 mV/V bridge
Overview
The WTQ-22 series is a large-range static (reaction) torque sensor for 50 to 10,000 N·m. One end carries a key or internal square and the other a flange, so it couples a high-torque shaft to a fixed flange and holds against the torque without turning.
It is the large-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.
50 N·m to 10,000 N·m
A large-range series for high static torque.
Key or internal square + flange
A key or internal square on one end, a flange on the other.
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 WTQ-22 is fixed at the flange end, so the shaft does not turn. High torque applied through the key or internal square is carried as a reaction load and 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 design scales from 50 N·m up to 10,000 N·m by changing the element.
Technical specifications
| Parameter | Specification |
|---|---|
| Measuring principle | Static reaction strain-gauge |
| Measuring range | 50 to 10,000 N·m (50, 1,000, 2,000, 5,000, 10,000 N·m) |
| Mounting | Key or internal square one end, flange the other |
| 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 | Stainless steel or alloy steel |
Models and ranges
Representative rated torques, key or internal square and flange:
| Rated torque | Mounting |
|---|---|
| 50 N·m | Key/square + flange |
| 1,000 N·m | Key/square + flange |
| 2,000 N·m | Key/square + flange |
| 5,000 N·m | Key/square + flange |
| 10,000 N·m | Key/square + flange |
Range and mounting
Pick by torque range and how it mounts:
| Model | Range | Mounting |
|---|---|---|
| WTQ-22 series | 50 N·m-10 kN·m | Key/square + flange |
| WTQ98 series | 0.2 N·m-50 kN·m | Flange both ends |
| WTQ-32 | 5-500 N·m | Square drive + flange |
| WTQ-9500 flange | 50-1,000 N·m | Disc flange |
See the WTQ98 flange series, flange torque sensor or reaction torque sensor.
Applications
- High-torque calibration and reaction stands
- Large motor, gearbox and drive stall torque
- Static torque from 50 N·m to 10,000 N·m
- Heavy assembly and fastening verification
- Test benches for high-torque drivetrains
Challenge: A drivetrain bench had to read high holding torque, into the thousands of newton-meters, as a fixed reaction load.
Solution: A WTQ-22 sized to the band, keyed to the drive on one end and flanged to the fixed frame on the other, reading reaction torque to the readout.
Result: The large-range series covered the high-torque bands with one mounting style, so the bench handled heavy drivetrains without a custom sensor.
Related products
FAQ
What is the WTQ-22 torque range?
The series runs from 50 N·m up to 10,000 N·m, covering 50, 1,000, 2,000, 5,000 and 10,000 N·m.
How does it mount?
One end has a key or internal square and the other a flange, so a high-torque shaft couples to a fixed flange.
Is it static or rotating?
Static. It is a reaction sensor held at the flange, 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 WTQ-22 is the large-range key-and-flange 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.