Products › Torque Sensors › Flange Torque Sensor (WTQ-9500)
Flange Torque Sensor (WTQ-9500)
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-9500
- Range: 50 N·m to 1,000 N·m
- Type: disc flange, static (0 rpm)
- Mounting: flange-plate, through bore
- Accuracy: ±0.1 to ±0.3% FS
- Output: 1.0-1.5 mV/V bridge; 4-20 mA or 0-5/10 VDC optional
Overview
The WTQ-9500 is a disc-style flange torque sensor for static, non-rotating torque. It bolts flange-to-flange through a bolt circle, with an open center bore, and reads reaction torque from 50 to 1,000 N·m.
Because it is a reaction sensor, there are no slip rings or bearings, and the low-profile disc sits in line with the load. It suits flange-mounted test rigs, motor and pump brackets, bolt-tightening checks and limited-rotation torque such as turning a nut or a brake.
Features
What sets this reaction torque sensor apart on the bench:
Flange-plate mount
Bolts flange-to-flange on a bolt circle, so it sits in line with the load with a low profile.
Through bore
An open center lets a shaft or fastener pass through the disc.
Static (reaction)
Measures non-rotating torque, so there are no slip rings or bearings to wear.
50 to 1,000 N·m
Five rated capacities for low to mid reaction torque.
Strain-gauge bridge
A four-wire metal-foil bridge at 1.0-1.5 mV/V, with amplified output optional.
Overload protected
Safe to 150% and ultimate to 200% of full scale.
Working principle
When torque is applied across the flange, the disc body twists slightly and strains a metal-foil bridge bonded inside it. Four strain gauges in a Wheatstone bridge turn that strain into a millivolt signal proportional to torque. Because the sensor is fixed and does not rotate, there are no slip rings or bearings. An amplifier can convert the bridge output to 4-20 mA or 0-5/10 VDC.
Technical specifications
| Parameter | Specification |
|---|---|
| Measuring principle | Disc-style flange, reaction (static) strain-gauge bridge |
| Measuring range | 0-50 to 1,000 N·m (50 / 100 / 200 / 500 / 1,000 N·m) |
| Sensitivity | 1.0-1.5 mV/V |
| Non-linearity | ±0.1 / ±0.3% FS |
| Zero output | ±2% FS |
| Hysteresis | ≤±0.05% FS |
| Repeatability | ≤±0.05% FS |
| Creep | ≤±0.03% FS / 30 min |
| Temperature effect | 0.03% FS / 10 °C (zero and span) |
| Compensated temperature | -10 to 60 °C |
| Operating temperature | -20 to 65 °C |
| Output resistance | 700 ±5 ohm |
| Insulation resistance | ≥5,000 M-ohm / 100 VDC |
| Excitation | 10-15 VDC |
| Safe overload | 150% FS |
| Ultimate overload | 200% FS |
| Output options | mV/V bridge; 4-20 mA or 0-5/10 VDC optional |
| Cable | 5.2 mm x 3 m |
| Material | Alloy steel or stainless steel |
Models and ranges
Standard rated torques, disc flange, static:
| Rated torque | Type |
|---|---|
| 50 N·m | Disc flange, reaction |
| 100 N·m | Disc flange, reaction |
| 200 N·m | Disc flange, reaction |
| 500 N·m | Disc flange, reaction |
| 1,000 N·m | Disc flange, reaction |
Flange or shaft mount
Pick by how the sensor mounts:
| Type | Mounting | Choose when |
|---|---|---|
| WTQ-9500 disc flange | Flange-to-flange bolt circle, through bore | Low-profile inline reaction torque |
| Keyed-shaft reaction | Shaft input | Torque-wrench or motor-bench reaction torque |
For keyed or square-drive reaction torque, see the reaction torque sensor; for a spinning shaft, see the rotary torque sensor.
Applications
- Flange-to-flange reaction torque in test rigs
- Motor, pump and gearbox bracket reaction torque
- Bolt-tightening and fastener torque verification
- Limited-rotation torque, such as turning a nut or a brake
- Calibration of torque tools
Challenge: A test setup needed reaction torque up to 1,000 N·m read at a flange, with a voltage output and a special flange pattern to match the rig.
Solution: A flange-style reaction torque sensor rated for 1,000 N·m with a ±10 V output, built to the rig flange drawing.
Result: The flange mount read torque with no rotating parts, and the sensor bolted straight to the rig on the custom flange with a voltage signal.
Related products
FAQ
What is a flange torque sensor?
It is a reaction torque sensor that bolts flange-to-flange. The WTQ-9500 is a disc-style flange unit that measures static torque from 50 to 1,000 N·m through a bolt circle with an open center bore.
How does a flange torque sensor work?
Torque applied across the flange twists the disc body and strains a four-gauge bridge inside it. The bridge output is proportional to torque, and an amplifier can give 4-20 mA or 0-5/10 VDC.
Should I choose a shaft or flange torque sensor?
Choose a flange unit like the WTQ-9500 for a low-profile, flange-to-flange reaction mount with a through bore. Choose a keyed-shaft reaction sensor when the torque comes in on a shaft, or a rotary sensor when the shaft spins.
What torque range does the WTQ-9500 cover?
Five rated capacities: 50, 100, 200, 500 and 1,000 N·m, all static (0 rpm).
What is another name for a torque sensor?
A torque sensor is also called a torque transducer, torque cell or moment sensor. A static one is a reaction torque sensor.
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.