8661, Contactless Rotary Torque Sensor
- Measuring range from 0.02 N·m to ±1000 N·m.
- Low linearity deviation of ≤ ±0.05% F.S.
- Intelligent operating state indicators.
- 16-bit D/A converter with digital adjustment.
- Output options: ±10 V, optional ±5 V or USB.
- Optional speed and angle measurement with resolution up to 2000 increments.
- Outstanding price-performance ratio.
The Type 8661 torque sensor operates on the strain gage principle and features non-contact, maintenance-free operation due to its inductive and optical signal transmission methods. This advanced design allows for the direct digitization of signals on the shaft, which are then output as either a voltage signal or via USB by the integrated evaluation electronics. The sensor's superior bearing quality supports operational speeds of up to 25,000 rpm based on the measurement range.
Equipped with a bidirectional voltage output of -10 V to +10 V, the Type 8661 efficiently determines rotation direction. It offers optional enhancements for detailed speed and angle measurements, capable of accommodating up to 2000 increments for precise motion analysis, outputting through a TTL signal.
The sensor is fully compatible with the DigiVision Light software when utilized with USB connectivity, facilitating straightforward integration into diverse control systems. For broader application support, downloadable drivers for LabVIEW and DASYLab are available, enhancing the sensor's versatility in complex setups. Optional accessories such as various lengths of connection cables, metal bellows couplings, and mounting blocks allow for tailored integration into specific customer systems.
| Type | Rotary |
| Dual Range | |
| Dual Range | 1:4 |
| 1:5 | |
| 1:10 | |
| Full Scale | 0.02 Nm |
| 0.05 Nm | |
| 0.1 Nm | |
| 0.2 Nm | |
| 0.5 Nm | |
| 1 Nm | |
| 2 Nm | |
| 5 Nm | |
| 10 Nm | |
| 20 Nm | |
| 50 Nm | |
| 100 Nm | |
| 200 Nm | |
| 500 Nm | |
| 1000 Nm | |
| Max Speed | 7000 RPM |
| 15000 RPM | |
| 25000 RPM | |
| Output | ±5 V DC |
| ±10 V DC | |
| USB | |
| Precision | ±0.05 % FS |
| Excitation | 10 V - 30 V DC |
| Drive Side | Round Shaft |
| Test Side | Round Shaft |
| IP Rating | IP40 |
| Min Temperature | 0 °C |
| Max Temperature | 60 °C |
This sensor is perfect for industrial production and assembly applications where there is a need to measure actuating or breakaway torques, holding torques or tightening torques.
Its high measurement quality means that the sensor is equally suited to quality control applications and laboratory-based research and development projects.
For network-independent, mobile use, the torque sensor offers an optional USB interface. This can be connected to a notebook running the PC software supplied with this device to take on-site measurements with accompanying visualization and archival of measurement values.
The applied torque can be read easily by evaluation units or controllers connected to the normalized analog interface.
Its compact, robust and vibration-proof construction makes it suitable for use in the following example applications:
- Test setups for precision mechanics
- Measurements on micromechanical actuator elements
- Engine test benches including measurement of mechanical power
- Recording biomechanical movements in medical engineering
- Precision frictional torque movements on bearings
- Use as test-bench measuring device
| 8661-4020 | +/-0.02 Nm, (0.177in-lb.); Shaft O.D. 5g6 |
| 8661-4050 | +/-0.05 Nm, (0.4425in-lb.); Shaft O.D. 5g6 mm |
| 8661-4100 | +/-0.1 Nm, (0.885in-lb.); Shaft O.D. 5g6 mm |
| 8661-4200 | +/-0.2 Nm, (1.77in-lb.); Shaft O.D. 5g6 mm |
| 8661-4500 | +/-0.5 Nm, (4.425in-lb.); Shaft O.D. 5g6 mm |
| 8661-5001 | +/-1 Nm, (8.85in-lb.); Shaft O.D. 5g6 mm |
| 8661-5002 | +/-2 Nm, (17.7in-lb.); Shaft O.D. 6g6 mm |
| 8661-5005 | +/-5 Nm, (44.25in-lb.); Shaft O.D. 15g6 mm |
| 8661-5010 | +/-10 Nm, (88.5in-lb.); Shaft O.D. 15g6 mm |
| 8661-5020 | +/-20 Nm, (177in-lb.); Shaft O.D. 15g6 mm |
| 8661-5050 | +/-50 Nm, (442.5in-lb.); Shaft O.D. 26g6 mm |
| 8661-5100 | +/-100 Nm, (885in-lb.); Shaft O.D. 26g6 mm |
| 8661-5200 | +/-200 Nm, (1770in-lb.); Shaft O.D. 26g6 mm |
| 8661-5500 | +/-500 Nm, (4425in-lb.); Shaft O.D. 45g6 mm |
| 8661-6001 | +/-1000 Nm, (8850in-lb.); Shaft O.D. 45g6 mm |
8661 Contactless Rotary Datasheet |
Metal Bellows Coupling (8690) Datasheet |
Precision Torque Monitoring with 9307 and 8661 Brochure |
8661-4050-v0x00 STP Drawings |
8661-4050-v0x00 CAD Drawing Drawings |
8661-4100-v0x00 CAD Drawing Drawings |
8661-4200-v0x00 CAD Drawing Drawings |
8661-4500-vxx00 CAD Drawing Drawings |
8661-5001-vxx00 CAD Drawing Drawings |
8661-5002-vxx00 CAD Drawing Drawings |
8661-5005-vxx00 CAD Drawing Drawings |
8661-5010-vxx00 CAD Drawing Drawings |
8661-5020-vxx00 CAD Drawing Drawings |
8661-5050-vxx00 CAD Drawing Drawings |
8661-5100-vxx00 CAD Drawing Drawings |
8661-5200-vxx00 CAD Drawing Drawings |
8661-5500-vxx02 CAD Drawing Drawings |
8661-6001-vxx02 CAD Drawing Drawings |
- Contactless Rotary Torque Sensor
- Dual Range
- Keyway Shafts
- Connection: 12-pin Series 581 Connector with Speed Option
- Analog Output ±5V (±10V Option)
| Type | Rotary, Dual Range |
| Dual Range | 1:10 |
| Full Scale | 0.5 Nm, 1 Nm, 2 Nm, 3 Nm, 5 Nm, 10 Nm, 20 Nm, 30 Nm, 50 Nm, 100 Nm, 200 Nm, 300 Nm, 500 Nm, 1000 Nm, 2000 Nm, 5000 Nm, 10000 Nm, 20000 Nm |
| Max Speed | 5000 RPM, 5500 RPM, 7000 RPM, 10000 RPM, 12000 RPM, 15000 RPM |
| Output | ±5 V DC, ±10 V DC, Speed/Angle (TTL) |
| Precision | ±0.10 % FS |
- Contactless Rotary Torque Sensor
- Dual Range
- Round Shafts
- Connection: 12-pin Series 581 Connector with Speed Option
- Foot Mounted
- Analog Output ±5V (±10V Option)
| Type | Rotary, Dual Range |
| Dual Range | 1:10 |
| Full Scale | 5 Nm, 10 Nm, 20 Nm, 30 Nm, 50 Nm, 100 Nm, 200 Nm, 300 Nm, 500 Nm, 1000 Nm, 2000 Nm, 5000 Nm, 10000 Nm, 20000 Nm |
| Max Speed | 3500 RPM, 5500 RPM, 7000 RPM, 12000 RPM |
| Output | ±5 V DC, ±10 V DC, Speed/Angle (TTL) |
| Precision | ±0.10 % FS |
- Contactless Rotary Torque Sensor
- Dual Range
- Keyway Shafts
- Connection: 12-pin Series 581 Connector with Speed Option
- Digital Output RS-485
| Type | Rotary, Dual Range |
| Dual Range | 1:10 |
| Full Scale | 0.5 Nm, 1 Nm, 2 Nm, 3 Nm, 5 Nm, 10 Nm, 20 Nm, 30 Nm, 50 Nm, 100 Nm, 200 Nm, 300 Nm, 500 Nm, 1000 Nm, 2000 Nm, 5000 Nm, 10000 Nm, 20000 Nm |
| Max Speed | 5000 RPM, 5500 RPM, 7000 RPM, 10000 RPM, 12000 RPM, 15000 RPM |
| Output | RS-485, Speed/Angle (TTL) |
| Precision | ±0.10 % FS |
- Contactless Rotary Torque Sensor
- Dual Range
- Round Shafts
- Connection: 12-pin Series 581 Connector with Speed Option
- Digital Output RS-485
| Type | Rotary, Dual Range |
| Dual Range | 1:10 |
| Full Scale | 5 Nm, 10 Nm, 20 Nm, 30 Nm, 50 Nm, 100 Nm, 200 Nm, 300 Nm, 500 Nm, 1000 Nm, 2000 Nm, 5000 Nm, 10000 Nm, 20000 Nm |
| Max Speed | 3500 RPM, 5500 RPM, 7000 RPM, 12000 RPM |
| Output | RS-485 |
| Precision | ±0.10 % FS |
- Contactless Rotary Torque Sensor
- Round Shafts
- Very Short Axial Length
- Speeds up to 15000 RPM
- Connection: 12-pin Series 581 Connector with Speed Option
- Accuracy Class 0.05% Available
- Analog Output ±5V (±10V Option)
| Type | Rotary |
| Full Scale | 0.1 Nm, 0.2 Nm, 0.5 Nm, 1 Nm, 2 Nm, 5 Nm, 10 Nm, 15 Nm, 20 Nm, 30 Nm, 50 Nm, 100 Nm, 200 Nm, 500 Nm, 1000 Nm, 2000 Nm, 5000 Nm, 10000 Nm, 20000 Nm |
| Max Speed | 5000 RPM, 5500 RPM, 8000 RPM, 10000 RPM, 12000 RPM, 15000 RPM |
| Output | ±5 V DC, ±10 V DC, Speed/Angle (TTL) |
| Precision | ±0.10 % FS, ±0.20 % FS |
| Excitation | 12 V - 28 V DC |