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ROTOCON Slip Ring Ensures Small Currents and Voltages are Measured Precisely

low noise slip ring


Meridian Laboratory was contacted by a team at Heriot-Watt University in Edinburgh, Scotland. They were working on a research project to investigate energy harvesting from a rotational power source without stationary components. For the experimental testing, it was necessary to transfer the generated electrical signal from the rotating components to a non-rotating data acquisition card. This needed to be done at high rotational speeds (up to 1000 RPM), and with as little noise and resistance as possible in order to measure small voltages (mV to 10V in amplitude). Therefore, a high quality slip ring was needed.

Brushless Slip Ring

“Looking at products all over the world, Meridian’s slip-rings stuck out due to their high operational speeds and reduced noise in the signal compared to common brush contacts.”


Meridian Laboratory engineers determined an MX-2 ROTOCON Rotary Electrical Connector, designed to transfer low voltage (0-10 V)* & low currents (0-0.5 A)* at high speeds (1000 RPM), would be ideal for this energy harvesting project. Installing the ROTOCON was made easy with the aid of a straightforward best practice video.

The MX-2 performs great in both high rotational speeds and low power output, empowering the team to measure even very small currents and voltages precisely. The team was very satisfied with the reliability of both product and support.

*Please note: A standard MX-2 is capable of up to 20A/channel and 600V+, but the slip ring is equally as effective in very low/signal level operations, as required in this new application.

low noise slip ring

About ROTOCON End-of-Shaft Slip Rings

Meridian Laboratory’s M-Series, end of shaft slip ring alternatives are available in different capacities capable of providing power and signals up to 100 contacts, and up to 35A/contact.

Like all other ROTOCON rotating electrical contacts, the M-Series is designed to be able to accommodate signal/data level transmission as well as high current power transfer. Similarly, the ROTOCON M-Series remains unaffected by machine vibration or rotational speed, throughout its entire RPM range. The ROTOCON M-Series is offered in a variety of electrical termination options including ring terminals, flying leads, MIL-spec, or wet-mate connectors on both rotating and stationary ends.

Unlike conventional brushed slip rings which rely on metal-on-metal contacts and are limited by RPM, electrically noisy, and require adjustment and maintenance for proper operation – all ROTOCONs are brushless, functioning through a molecularly bonded viscous metal film which remains unaffected by speed, provides clean and noise-free electrical signals, and requires no maintenance.

(This video features high-precision MilliOhm Meters that are measuring real-time electrical resistance of each slip ring. As you can see the ROTOCON always delivers perfect signal at all RPMs, zero maintenance and no downtime, and is capable of power and data communication.)

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Google Rating

5.0 43 reviews

  • Avatar Alex Charters ★★★★★ 7 months ago
    I contacted Meridian Laboratory to obtain a slip ring for my Undergraduate Senior Capstone project. The project required … More a slip ring capable of highspeed data transfer with very little noise to drive an LED bar on a fan to generate images. Sven Krause was very knowledgeable and responsive and helped me figure out what product I needed. He even managed to get the slip ring donated to our team and had great advice on how to integrate it into our project. The project was a huge success thanks to Meridian Laboratory.
  • Avatar Michael D ★★★★★ 3 years ago
    I found Meridian's polyurethane ML6 fit and finish to be superior to other rollers we had sourced in the past. The tolerances … More were very tight and eliminated a lot of the jamming issues we were experiencing from the OEM's parts.
  • Avatar Joseph Ippoliti ★★★★★ 2 weeks ago
    I searched for a proper rotary ground and never found anything that was high quality, priced right and reasonably sized until … More I found Meridian Laboratory. Adam from technical sales guided me through options and quickly zeroed into a solution that was perfect for us.
    Communications were great for payment and shipping and the unit arrived as promised.
    What I received it, it was like a jewel. High quality, perfect size and installed in minutes. The ground works flawlessly at any rotation.
    I highly recommend Meridian Laboratory. We were able to install the rotary ground and simply forget it. It works that well.

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