Products › Torque Sensors › Reaction Torque Sensor
WTQ11A Static Torque Sensor (Key + Flange, 0.2-100 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: WTQ11A
- Range: 0.2 N·m to 100 N·m
- Type: static (reaction)
- Mounting: keyed (through slot) one end, flange the other
- Accuracy: ±0.1 to ±0.3% FS
- Output: 1.0-1.5 mV/V bridge
Overview
The WTQ11A is a static (reaction) torque sensor for 0.2 to 100 N·m. One end has a keyed (through-slot) coupling and the other a flange, so it joins a shaft to a fixed flange and holds against the torque without turning.
It is the key-and-flange 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 (through slot) + flange
A through-slot key on one end, a flange on the other.
0.2 N·m to 100 N·m
Low to mid-range static torque for benches and fixtures.
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 WTQ11A is held at the flange end, so the shaft does not turn. Torque applied through the through-slot key 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 key couples the moving side, while the flange bolts to the fixed side.
Technical specifications
| Parameter | Specification |
|---|---|
| Measuring principle | Static reaction strain-gauge |
| Measuring range | 0.2 to 100 N·m (0.2, 0.5, 1, 2, 5, 10, 20, 30, 50, 100 N·m) |
| Mounting | Keyed (through slot) 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 | Aluminum alloy (0.2-30 N·m); alloy or stainless steel (40-100 N·m) |
Models and ranges
Standard rated torques, key and flange:
| Rated torque | Mounting |
|---|---|
| 0.2 N·m | Key + flange |
| 1 N·m | Key + flange |
| 5 N·m | Key + flange |
| 20 N·m | Key + flange |
| 50 N·m | Key + flange |
| 100 N·m | Key + flange |
Range and mounting
Pick by range and how it mounts:
| Model | Range | Mounting |
|---|---|---|
| WTQ11A | 0.2-100 N·m | Key (through slot) + flange |
| WTQ-32 | 5-500 N·m | Square drive + flange |
| WTQ-120 | 5-200 N·m | Keyed shaft |
| WTQ98 series | 0.2 N·m-50 kN·m | Flange both ends |
See the WTQ-32, keyed static torque sensor or reaction torque sensor.
Applications
- Torque calibration on a fixed stand, 0.2 to 100 N·m
- Reaction torque on keyed test fixtures
- Static holding and breakaway torque
- Assembly and quality torque verification
- Laboratory torque references
Challenge: A bench needed to read static torque from fractions of a newton-meter up to 100 N·m, coupling to a shaft on one side and fixed on the other.
Solution: A WTQ11A keyed to the shaft through its slot and flanged to the bench, reading reaction torque straight to the readout.
Result: The key-and-flange mount coupled the shaft without a new fixture, and one unit covered the low-to-mid range for routine torque checks.
Related products
FAQ
What is the WTQ11A torque range?
From 0.2 to 100 N·m: 0.2, 0.5, 1, 2, 5, 10, 20, 30, 50 and 100 N·m.
How does it mount?
One end has a keyed through-slot coupling and the other a flange, so a shaft joins 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 WTQ11A is the 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.