Is there a method to measure the temperature or torque of rotating parts continuously without wire breakages?

Yes, this can be solved by using a slip ring. By positioning sensors on the rotating assembly and routing them through a rotary electrical connector (slip ring) to the stationary side, you achieve continuous data tracking while completely preventing wire tangles or structural breakages. Coco Research offers robust configurations supporting speeds from low rpm up to high-speed limits of 20,000 rpm.

How do I mitigate electrical noise when measuring low-voltage signals (such as thermocouples) from rotating bodies?

An effective configuration is mounting a thermocouple amplifier directly onto the rotating body to amplify the signal before it travels through the slip ring. This approach minimizes noise vulnerability at sliding contact points and avoids temperature measurement inaccuracies. Combined with our fully isolated measuring instruments, you can establish highly noise-resistant measurement systems.

Can I efficiently digitize signals received via a slip ring assembly?

Yes, Coco Research CAN-compatible digital instruments (EX Series) are optimized for this exact use case. They convert incoming analog signals from the slip ring at a high-speed 1 ms update rate and output them automatically onto the CAN bus line. This substantially limits programming and software development costs on the host controller side.

What is the recommended setup when multi-channel testing is required for multiple parameters?

Combining multi-pole slip rings with Coco Research's multi-channel customized instrumentation allows you to monitor parameters like temperature, speed, and position simultaneously. We provide bespoke box-enclosure customizations housing multiple setups in a unified unit, configured to factory-default settings matching your custom sensors for a plug-and-play delivery.

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Applications: Measurement of Temperature, Torque, Speed, and Position on Rotators Using Slip Rings

■ Enables detailed tracking of temperature, torque, speed, and position while supplying power to driving parts and heat sources on rotating bodies.

■ High demand exists for slip rings that are compact, lightweight, support multi-pole configurations, offer long service lives, provide high quality, and handle a wide range of rotational speeds from low to high.

■ We can also configure factory-default settings on the measuring instruments to match your sensors or amplifier outputs and provide a custom configuration reference sheet.

Measurement Examples Using Slip Rings

■ Measuring Internal Temperature and Rotational Speed of Agitation Tanks

Chemical mixers, pellet melting machines, roasting machines, etc.

■ Measuring Temperature and Rotational Speed of Heat Rolls

Large printing presses, sheet film manufacturing equipment, etc.

What is a Slip Ring?

A slip ring is a rotary electrical connector that transmits power and electrical signals from a stationary structure to a rotating body.
It operates through continuous sliding contact between stationary metal brushes and rotating metal rings.

Hollow Type

Shaft-End Type

Built-in Encoder Type:
Saves Installation Space

Advantages of Slip Rings

■ Eliminates cable twisting, shaft tangling, and wire breakages

■ Ensures uninterrupted power transmission and communication

■ Customizable combinations of pole counts to suit signals, power, or control needs

Without a Slip Ring... (Lead wires only)
The wiring between the rotating and stationary sides becomes tangled around the shaft, causing rotation to stop or wires to break.

With a Slip Ring...
By routing connections through a slip ring, power and signals are successfully transmitted without wiring tangles.

Outputs / Inputs
Analog Output
CAN
RS-232C
RS-485
BCD
Data Logging
Count Control Input
Alarm Output

Application Examples: Measuring Temperature, Torque, Speed, and Position for the Following Rotators

Engines

Motor Rotors

Transmissions

Tires & Brakes

Turbines

Pumps

Robot Arm Positions

Cameras

Turntables

Construction, Agricultural & Fire Vehicles

Wind Turbines

Filling & Production Equipment

Semiconductor Equipment

Measurement Capabilities

Multi-Pole Slip Rings & Multi-Channel Instruments
Simultaneously and accurately capture various conditions across the rotating body.

Noise-Resistant Pulse Signals (Speed/Position) for Long Distances
Maintains high accuracy even when the instrument is located far from the measurement target.

Amplification via On-Rotator Thermocouple Amplifiers
Prevents temperature measurement errors and mitigates noise interference.

High-Speed Output Updates for Display and Analysis
Analog output updates at 0.1 ms; digital output updates at 1 ms. *Varies by model

Automated CAN Data Output Reduces Development Costs
Supports automated CAN data transmission, as well as command-response mode for data retrieval.

EXL Series (40 ms+ Update Rate) Starts From 15,100 JPY*
*Price for Type 2451 voltmeters (Without display, DIN-rail mount).

Key Selection Points

Slip Rings

Rotational Speed

Handles a wide range of speeds from low to high.

Compact & Lightweight

Minimizes any physical impact on the rotation.

Vibration Resistance

Suitable for long shafts or cantilever-supported rotators.

Low Noise & Long Life

High-conductivity, low-ionization gold/silver sliding contacts ensure long-term stability for signals and power.

Multi-Pole / Multi-CH

Supports multiple channels and polar combinations.

Thermocouple Amplifier

Mounts directly on rotators to minimize noise; features built-in cold junction compensation, eliminating the need for extension wires.

Measuring Instruments / Signal Converters

Analog Output

Updates at 0.1 / 1 / 40 ms, etc. Features 16-bit output resolution.

CAN Communication

EX Series (1 ms updates) and EXL Series (40 ms updates).

High Accuracy at Ultra-Low Speeds

Periomatic™ calculation algorithm (for speedometers, totalizers, and torque calculators).

Enclosure Customization

Houses multi-type, multi-channel setups in a single box. Calibration and certification in this housed state are available.

Starting from 15,100 JPY*

Budget-friendly EXL Series (with 40 ms+ output update rates).

Sensor Power Supply Output

Provides power to pressure sensors, level meters, etc. (Supports DC 24 / 12 / 5 V, etc.).

Ready to Use

Factory configuration to match your sensors or amplifiers, along with configuration reference sheets, can be provided.

Related Products

View All >

Load Cell / Pressure / Strain Gauge	CAN Conversion
DC Current	DC Voltage
Thermocouple (Temperature)	Thermistor (Temperature)
RTD (Temperature)	Resistance
Speed / Totalizer	Frequency Deviation / Torque

- CAN Output
- 16-bit Analog (Voltage / Current) Output
- Simultaneous CAN and Analog Output Available (1 ms or 40 ms updates)
- USB-C Interface Equipped as Standard: Setup and Data Logging
- Alarm Outputs / RS-485
- Free Measurement Management Software: Configuration, Report Printing, and Data Logging

EX48: 35,800 JPY~

EX(L)24: 15,100 JPY~

Customization Support [Please consult with us]

We provide multi-functional, single-unit customization combining measurements such as speed, position, angle, temperature, current, voltage, resistance, torque, and strain.
Power supplies, connectors, and wiring can be optimized for outstanding user friendliness.

View All Customizations

■ Flexible combinations of measurement types and channels ■ Convenient, easy, and cost-effective ■ Modifications to functions (power supply, output voltage, communication protocols, etc.)
■ Available from a single unit ■ Calibration as an integrated assembly supported ■ Calibration certificates and traceability charts can be issued

Enclosures / Box Units

> Details

Multi-CH with Display

> Details

Multi-CH Radiation Thermometer (CAN Output)

> Details

With SD Logger

> Details

Rack Assembly

> Details

Handy Type

> Details

Selectable Options Include Connectors, Displays, and Power Inputs

Connectors

Terminal Block

For Thermocouple

Banana Jack

BNC

LAN

USB-C

D-sub

HDMI

Display Options

LCD Monitor

Without Display

Monitor Display

Free monitoring software provided.
*Monitor not included.

Power Inputs

AC Power

DC Power

Slip Rings for Measurement and Control – Transmitting Electrical Signals and Power Between Rotating and Stationary Sides

(Manufactured by Tosoku Co., Ltd.)

Slip Rings for
Measurement/Control
Product Page

*Links to the Tosoku website

■ Mounting Methods: Shaft-end type and Hollow type available.
■ Ring and Brush Configuration: Integrated and Separated types available.
■ Product lines cater to speeds from a few rpm up to high-speed applications of 20,000 rpm.
■ Compact and lightweight designs optimized for high-speed rotations.
■ On-rotator mountable amplifiers amplify signals close to the source, significantly mitigating noise interference.

Related Applications

View All Applications >

Various Measurements in Wind Tunnel Tests: Vehicles, Architectural and Civil Engineering Structures, etc.

Measurement and Evaluation of Printers, Copiers, and Large Printing Presses

Integration into Burn-in Testing Equipment

Field-oriented Speedometers / Totalizers for Motor and Engine Rotations and Angle Measurements

　> Contact us　