Products › Torque Sensors › Reaction Torque Sensor
WTQ98 Static Torque Sensor (Flange, 0.2 Nm-50 kNm)
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: WTQ98 series
- Range: 0.2 N·m to 50 kN·m
- Type: static (reaction)
- Mounting: flange both ends
- Accuracy: ±0.1 to ±0.3% FS
- Output: 1.0-1.5 mV/V bridge
Overview
The WTQ98 series is a static (reaction) torque sensor with a flange on both ends. It does not rotate; it holds against the reaction torque and reads it through a strain-gauge bridge. The series spans a very wide band, from 0.2 N·m up to 50 kN·m.
It is the wide-range flange member of the static line. For a turning shaft, use a rotary torque sensor; for the general static range and options, 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.
Flange both ends
A flange on each end bolts into a fixed test or process frame.
0.2 N·m to 50 kN·m
One series covers small bench torque up to very 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 WTQ98 is fixed at both flanges, 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. Because nothing rotates, there are no slip rings or bearings, and the same design scales from 0.2 N·m to 50 kN·m by changing the element.
Technical specifications
| Parameter | Specification |
|---|---|
| Measuring principle | Static reaction strain-gauge, flange both ends |
| Measuring range | 0.2 N·m to 50 kN·m (0.2-100 N·m, 1k, 2k, 5k, 10k, 50k N·m) |
| Mounting | Flange 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 | 700 / 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 across the series, flange both ends:
| Rated torque | Mounting |
|---|---|
| 0.2-100 N·m | Flange both ends |
| 1,000 N·m | Flange both ends |
| 2,000 N·m | Flange both ends |
| 5,000 N·m | Flange both ends |
| 10,000 N·m | Flange both ends |
| 50,000 N·m | Flange both ends |
Range and mounting
Pick by torque range and how it mounts:
| Model | Range | Mounting |
|---|---|---|
| WTQ98 series | 0.2 N·m-50 kN·m | Flange both ends |
| WTQ-9500 flange | 50-1,000 N·m | Disc flange |
| WTQ-120 | 5-200 N·m | Keyed shaft |
| MRT | 0.1-20 N·m | Micro, disc |
See the flange torque sensor, keyed static torque sensor or reaction torque sensor.
Applications
- Torque calibration stands across a wide range
- Reaction torque on fixed test frames
- High-torque measurement from 10 to 50 kN·m
- Motor, gearbox and actuator stall and holding torque
- Assembly and quality torque verification
Challenge: A calibration bench had to cover torque from a few newton-meters to several thousand, all as a fixed reaction load, without a rotating sensor.
Solution: WTQ98 flange units sized to each band, bolted between fixed plates, each reading reaction torque through its bridge to the bench readout.
Result: One series covered the full range with a common mounting style, so the bench used the same fixture pattern from small to high torque.
Related products
FAQ
What is the WTQ98 torque range?
The series runs from 0.2 N·m up to 50 kN·m, covering 0.2-100 N·m and 1k, 2k, 5k, 10k and 50k N·m.
Is it static or rotating?
Static. It is a reaction sensor fixed at both flanges, so the shaft does not turn. For a turning shaft use a rotary torque sensor.
How does it mount?
A flange on each end bolts into a fixed frame, so the sensor holds against the torque.
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 WTQ98 is the wide-range 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.