Why does the HSTT1eS use a dual PCD coupling (66.0 / 44.0) under 100 Nm Range and such a low Inertia (0.0003 kgm2)?

The HSTT (High Speed Torque Transducer) family is designed for the e-axle sector, heavy drones, aeronautical wind tunnels, and electric turbines. Rotating at 40,000 RPM would disintegrate any standard torsion ring due to sheer centrifugal force. Atesteo compacts this gauge by creating a stepped Dual PCD flange (66 or 44 mm) that secures the rotor without flexing it. Being so minuscule, its inertia is a mere 0.0003 kg·m², enabling microscopic ballistic testing where a greater mass would negate the test's accuracy and shatter the vibration test bench.

Can the optical reader guarantee the accuracy class when subjecting the sensor to 40,000 RPM under EMI magnetic fields?

Absolutely. In fact, it's the mandatory standard. The HSTTeS variant is purely optical (transilluminated light). The exclusion of magnetic and galvanic rings eliminates friction and parasitic heating at 40k RPM, while also immunizing the readings against the strong electromagnetic pulses (dV/dt) produced by the high-frequency test inverters required to scale electric motors to these terminal speeds.

Torque Sensor HSTT1eS 50/100 Nm | 40,000 RPM | Aeronautical Testbed

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High-Speed Telemetry (Optical) | Range 50 – 100 N·m | Peak 40,000 RPM | Dual PCD Flange 66.0/44.0 mm | Inertia 0.0003 kg·m²

Manufacturer: ATESTEO
Category: High speed (>35,000 RPM), Rotary, Torque sensor

La serie HSTT1eS (High Speed Torque Transducer) mide par de 50 / 100 N·m con telemetría óptica (lumínica), sin rodamientos galvánicos.

Velocidad: 30.000 RPM base, 40.000 RPM en picos opcionales. Brida PCD dual 66.00 mm / 44.00 mm (rotor 82/58 mm). Inercia: 0.0003 kgm². Temperatura: 10…60 °C.

Precisión: ≤ ±0.05%.

Aplicaciones: testbeds de motores eléctricos de alta velocidad, turbinas e-axle y ejes aeroespaciales.

Torque sensors.

Properties

Nominal Metrological Range (Nm)	50 / 100 N·m (Micro-Torsional Precision)
Ballistic Rotational Management	30,000 RPM Base / 40,000 RPM Peak Optional
Dual Concentricity Diameter PCD	ISO Flange 66.00 mm / 44.00 mm (Rotor 82/58 mm)
Structural Inertia Density	0.0003 kgm² (Load-Free Antifriction Profile)
Class Precision (High Speed)	≤ ±0.05% (Shielded against Increasing Centrifugal Force)
Flight Reading Technology	Optical Telemetry Ring (Galvanic Isolation)
EMI Isolation (Inverter Testing)	Total Iron Resilience to Magnetic Noise dV/dt
Operating Thermal Tolerance	10…60 °C (Relative Zero Signal Deviation)
Main Application E-Axle	Turbines / Electric Motors / Ultra-fast Aeronautics