Why is the DST's Axis-to-Axis geometric interface mandatory for testing micromotors at 20,000 RPM?

When scaling from 5 to 20 Nm (micro torque), the use of heavy PCD flanges distorts the reading due to the exponential increase in inertia. The DST transducer mandates polished cylindrical shafts for miniature bellows couplings. This creates a purist 1:1 drop-in replacement kinematic train that reacts cleanly at 20,000 RPM without introducing external resonances to the test bench.

How does the DST Series maintain its Class 0.05 Accuracy while operating in such an extreme rotating environment?

By eliminating inherent mechanical friction, it radically removes brushes or pre-tensioned bearings and utilizes inductive field telemetry between the smooth rotor and stator. The 60 ppr TTL encoder outputs interference-immune digital signals, ensuring Class 0.05 measurements on an EMI-impermeable, nickel-plated stainless steel structure.

DST Rotary Torque Sensor 5-20 Nm | 20,000 RPM | Class 0.05 Accuracy

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Contactless Transmission | 5 – 20 N·m | 20,000 RPM | Shaft-to-Shaft Coupling

Manufacturer: ATESTEO
Category: Low torque (0.5-100 Nm), Rotary, Torque sensor

DST Series (Dynamic Shaft Torque): Compact rotary torque sensor with a cylindrical shaft, made of nickel-plated stainless steel. Ranges: 5, 10, and 20 N·m. Flangeless: does not use a PCD pattern, direct trunnion drive. Speed: up to 20,000 RPM.

Contactless, brushless rotary transmission. 60 ppr optical encoder. Combined frequency and voltage output: 60 kHz ± 20 kHz frequency or ±10V analog. Overall accuracy: class 0.05.

Applications: test benches for fractional horsepower motors and actuators.

Category: torque sensors.

Properties

Nominal Range (Nm)	5, 10, 20 N·m
Constant Rotational Limit	20,000 RPM
Global Accuracy	Class 0.05 (Standard) / Validator 0.10
Mechanical Interface	Smooth Cylindrical Shaft (Stainless Steel)
Transmission Technology	Non-contact electromagnetic (Wear-free)
Dynamic Speed Channel	Integrated Optical Encoder 60 ppr (TTL RS422)
Acquisition Outflows (Par)	Frequency (60 kHz ± 20 kHz) or Analog (±10V)
Power and Voltage	12 … 26 V DC
Compensated Temperature Range	+10°C … +60°C
Physical Isolation	IP42