Force and torque sensor Omega331

Overview

• 6-Axis Force/Torque Sensing – Measures force and torque in six degrees of freedom (Fx, Fy, Fz, Tx, Ty, Tz) with high ranges for industrial and robotic applications.
• Form Factor – Industrial design with embedded electronics for broad platform compatibility, providing precision and reliability for robotics and test benches.
• Analog Output (±10V) – Simple, real-time force/torque feedback compatible with PLCs, controllers and DAQ systems.
• Extremely-High Strength – EDM wire-cut from high yield-strength stainless steel; allowable overloads range ~5.3–21.8× rated capacity depending on axis.
• High Signal-to-Noise Ratio – Silicon strain gauges deliver ~75× stronger signal than conventional foil gauges; amplified for minimal noise distortion.
• Environmental Rating – IP20 standard for controlled environments; IP65 and IP68 variants available.

Available configurations / options

• Communication interfaces: Analog (±10V), EtherCAT & RS485, Ethernet & RS422, EtherNet/IP & CAN, PROFINET.
• Interface plate / environmental protection: IP20 (standard), IP65 (option), IP68 (option).
• Connector: 20-pin Lemo (standard for analog variant).

Specifications (table)
Measurement range — 40000 N / 6000 Nm
Sensing range — X/Y Force: ±40000 N; Z Force: ±88000 N; X/Y/Z Torque: ±6000 Nm
Resolution — X/Y Force: 6.25 N; Z Force: 17 N; X/Y Torque: 1.5 Nm; Z Torque: 0.75 Nm
Overload (single axis) — Force X/Y: ±240000 N; Force Z: ±520000 N; Torque X/Y: ±32000 Nm; Torque Z: ±36000 Nm
Stiffness — Force X/Y: 1.2×10^9 N/m; Force Z: 1.3×10^9 N/m; Torque X/Y: 9.2×10^6 Nm/rad; Torque Z: 2.4×10^7 Nm/rad
Physical — Height: 107 mm; Diameter: 330 mm; Weight: 47 kg
Interface plate rating — IP20 (standard); Communication interface — Analog (±10V) (varies by model)
Accuracy (% full scale) — 0.75–1.25% (axis-dependent)
Latency — <1 ms
Sample rate — 40 kHz (effective per-axis rate = total DAQ rate ÷ 6)
Connector — 20-pin Lemo

Notes
Accuracy values and effective per-axis sample rate vary by measurement axis and DAQ configuration.

Technical characteristics

• Model: Omega331
• Nominal measurement range: 40000 N / 6000 Nm
• Sensing ranges: X/Y Force ±40000 N; Z Force ±88000 N; X/Y/Z Torque ±6000 Nm
• Resolution: X/Y Force 6.25 N; Z Force 17 N; X/Y Torque 1.5 Nm; Z Torque 0.75 Nm
• Overload capacity: up to ±520000 N (Z force single axis) and up to ±36000 Nm (torque single axis), depending on axis
• Stiffness: values as listed above
• Dimensions: Height 107 mm; Diameter 330 mm; Weight 47 kg
• Communication interfaces available: Analog (±10V), EtherCAT & RS485, Ethernet & RS422, EtherNet/IP & CAN, PROFINET
• Connector: 20-pin Lemo (for analog variant)
• Typical accuracy: 0.75–1.25% FS (axis-dependent)
• Latency: <1 ms; Sample rate: 40 kHz
• Environmental ratings: IP20 standard; IP65 and IP68 options