NOn-contact measureing systems Customized technology from Melectric

Melectric is the only manufacturer on the market to offer three innovative technologies for non-contact measuring systems. These include torque measurement based on the magnetoelastic effect, non-contact measurement using near-field telemetry and radio-based measuring systems. Our aim is to develop customized solutions for your individual measuring tasks – from research and development to cost-efficient series solutions

Magnetoelastic measurement

Measurement of Torque, Angle, Acceleration, Temperature
Can be used with selected
ferromagnetic steel materials
Distance from shaft up to < 2 mm
sampling rates up to >25kHz

Longrange applications

distance from shaft up to 15 m
sampling rates up to 500 Hz
Developed for Mobile APP and much more.
Measurement of torque, bending, axial force, acceleration, angle, and more

Near-field telemetry

Distances from 1 to 35 mm. Wireless power and data transmission.
Sampling rates up to 5 kHz. Research and laboratory applications for all types of materials
Measurement of torque, bending, axial force, acceleration, angle, and more

Magnetoelastic torque measurement Versatile, durable, robust

General Information:

Minimal radial space required
No additional components on the shaft
Full automized production process for Serial products
The signal is transmitted only via the magnetic field
Ferromagnetic shaft with defined heat treatment conditions might be necessary

Telemetry for non-contact torque measurement Flexible, easy application, highest precision

General Information:

Minimal space required
Can be attached on all environments and material (e.g. steel, carbon fibre, AL, and further
Distances up to 35 mm for data and power transmission
Use our device with several sensors as strain gauges, acceleration, temperature or others.

Long-range and Bluetooth solutions Precise torque measurement with wireless technology

General Information:

Minimal space required
Distances up to 15m for data transmission
Regular power supply or battery powered
Use our device with several sensors as strain gauges, acceleration, temperature or others.

Wide spectrum of possible applications

Our solution enables precise measurements to be taken within a high torque range, from 1 Nm to several thousand Nm. As no additional components are applied to the shaft itself, it is possible to take measurements at rotation speeds of up to 300,000 rpm. The measurement accuracy is typically 1% FS and the signal bandwidth is usually 1 to 2 kHz, but can be increased to over 25 kHz for customer-specific applications. In addition, the evaluation electronics makes it possible to measure additional data, such as temperature, acceleration, and rotation speed. MELECTRIC offers many different options in terms of both analogue and digital output signals (0-5 V, 0-10 V, 4-20 mA, CAN BUS, I2C, UART, Bluetooth,…).

Discover possible applications

A maintenance-free alternative to conventional torque measurement

The system is completely wear-free as a result of the contactless torque measurement. Even in the event of strong vibrations, impacts, weather effects and temperature fluctuations, it continues to deliver precise and reliable data, demonstrating that magnetoelastic torque measurement is both a robust and affordable alternative to mechanical torque measurement.

Principles of torque measurement in comparison

	Angular misalignment	Strain gauges	Magnetic (Melectric)
Contactless	Yes, but a measurement can only be taken when the shaft is rotating	No, or only with the aid of technical equipment, such as telemetry or slip rings	Yes, without limitations
Rigidity	Very “soft” or elastic shaft required – problematic for dynamic control processes or applications that are sensitive to resonance	Limited (dependent on torsional strain). The emission of signals in the frequency spectrum over 1.5 kHz is impeded	Very wide range of measurement body rigidities possible
Size	Length:diameter ratio of around 5:1 required = long axial design	Inductive power supply and telemetry impede installation and require large application surfaces with respect to the measuring shaft	Minimal installation space: axial shaft lengths < 20 mm; radial installation space for the electronics = 5 mm. High degree of flexibility in design of housing and shaft
System run-time/signal bandwidth	Typically up to 0.5 kHz	Typically up to 1.5 kHz	Typically 1 – 2 kHz Special applications up to 25 kHz
Can be installed radially	No	No	Yes
Long-term stability	Yes	The bonded areas of the strain gauges can cause problems, especially if affected by the temperature	Yes

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