Non-contact torque sensor MDAB (RT8) up to 10,000 rpm

The MDAB is a rotating torque sensor with non-contact signal transmission. Because there are no slip rings to wear out, it is suitable for continuous operation and high speeds: up to 10,000 rpm in measuring ranges up to 500 N·m and up to 9500 rpm from 1000 N·m. The output is an amplified analog signal of ±10 V.

Key features at a glance

• Non-contact transmission: no slip ring, no mechanical wear in the signal path.
• Twelve measuring ranges: 0.5 · 2.5 · 5 · 10 · 25 · 50 · 100 · 250 · 500 · 1000 · 3000 · 5000 N·m in three sizes with shaft diameters 16h6, 25h6 and 50h6.
• High dynamics: bandwidth 1 kHz, sampling rate 3 kHz, output ±10 Vdc.
• Accuracy: Linearity and hysteresis ≤ ±0.2 %, temperature effect on zero point and characteristic value each ≤ ±0.02 % per 1 °C.
• Robust construction: measuring body made of stainless steel, housing made of aluminum, protection class IP40 according to EN 60529.
• Options: integrated incremental encoder (Line Driver RS422) and square drive coupling according to UNI ISO 1174-1, each to be ordered with the sensor.

Technical data at a glance

• Output: ±10 Vdc · Load resistance min. 3 kΩ
• Supply: 17…24 V, max. 28 V · Current consumption max. 60 mA
• Bandwidth / sampling rate: 1 kHz / 3 kHz · Insulation resistance > 2 GΩ
• Characteristic value tolerance: ≤ ±0.2 % · Zero position ≤ ±0.5 %
• Temperatures: Reference +23 °C · Operating -10…+70 °C · Storage -20…+80 °C
• Mechanical limits: Operating torque 100 %FS · Limit torque 150 %FS · Breaking torque > 300 %FS · Permissible oscillation range 70 %FS
• Rated speed: 10,000 rpm up to 500 N·m, 9500 rpm from 1000 N·m – the shaft couplings limit the speed of the system to 4000 rpm
• Torsional stiffness: 0.78 to 377 kNm/rad per measuring range · Moment of inertia 28 to 1475 kg·mm²
• Process connection: cylindrical shaft with keyway according to UNI 6604, optional square drive coupling according to UNI ISO 1174-1
• Connection: M12x1, 5-pin connector, with 3 m molded PVC cable; with encoder option 12-pin and 2 m cable
• Weight: 0.65…1 kg (0.5…500 N·m) · approx. 6 kg (1000…5000 N·m)
• Conformity: CE and RoHS according to labeling on manufacturer datasheet and type plate · Quality system certified according to EN ISO 9001:2015 (Dasa-Rägister, IQ-1100-01)
• On request: Calibration protocol and ACCREDIA calibration certificate according to ISO/IEC 17025, each clockwise and counterclockwise

Necessary accessories

For correct installation, two shaft couplings (MAAA, FLEXSTEEL or METALFLEX) and an adjustable stand are required. The couplings are designed for 4000 rpm and thus limit the speed of the system. They are mounted together with the sensor outside the machine and connected to a display so that no unwanted torque, bending, or tensile stress occurs during alignment.

Notes: For 0.5 N·m and 2.5 N·m, ACCREDIA calibration cannot be performed in LAT laboratory No. 93; it is possible on request through another accredited laboratory. The manufacturer does not publish a declaration of conformity for the RT8 – it must be requested.