Ref: B4-2WT

Slip Ring – Tubular – 4 circuits – 50.8mm – 7000rpm – Weatherproof - thin design

  • Tubular weatherproof slip ring
  • Circuit number: 4
  • Operating Temperature Range: -40°C to 121°C
  • Permanently lubricated bearings
  • Maximum Rotation speed: 7000 RPM
  • Maximum Peak Noise: 0.1ohm
  • Width : 20 mm
  • Maximum input: 1A

Download the product sheet



Michigan Scientific’s B4-2WT Thin Weatherproof Slip Ring Assembly is ideal for applications that require the slip ring to be sealed and mounted directly on a rotating shaft. Typically used for automotive drive shaft measurement applications, this model employs specially designed seals that provide complete weatherproof protection from water, dust, and other contaminants. It is designed to fit on shafts up to 2”/50,8mm in diameter and make electrical connection to strain gages, thermocouples, or other sensors that have been installed on rotating equipment. The slip ring brushes and rings are made of precious metals which minimize noise and enable the assemblies to be used for low level instrumentation signals.

Mounting and dismounting

The B4-2WT can be easily mounted by putting the diameter shaft inside the rotor. In this version, the 50.8mm diameter can be adapted to smaller axial measurements. The slip ring assembly is secured to the shaft with six 8-32 set screws. Connections are made through color coded solder terminals located on the slip ring rotor and a connector on the slip ring stator. Redundant terminals are included to provide back-up connections. Connections are made through solder terminals located on the slip ring rotor and a connector on the slip ring stator. A lower profile terminal plate can be used to replace the stator connector. The compact design of this slip ring make it ideal for applications where limited space is available. Collecting the stator's measurement signal is easily done by using the provided Bendix connector. No additional setup is required. The slip ring can be mounted and used in any application. Another great feature is the limited space it takes: 32mm.


  • Torque measurements transmission
  • Rear axle measurements
  • Vibration measurements
  • Acceleration measurements
  • Brake measurements
  • Gearbox rendering measurements

Options and accessories

  • Amplifier to connect between the sensor and the slip ring allowing the optimization of the signal's quality


As this assembly uses permanently lubricated bearings and solid silver alloy, along with their high-quality contacts, slip rings can be used constantly without any particular care. Degradation of the signal's quality can be observed after 50 to 100 million revolutions, more or less 100 000 kms on a standard passenger vehicle.

Thru the bore
Max rotation speed
7000 rpm
Courant maximal par voie
1000 mA
Rotor Diameter
50.8 mm
Diamètre stator
93.7 mm
20 mm
Température de fonctionnement
-40 to 121 °C
Contacts rotor
Picots à souder
Contact Stator
Connecteur standard
  • Rotor diameter: 50.8 mm
  • Stator diameter: 105.7 mm
  • Length: 20 mm
  • Custom wiring (cable lengh, connectors)
  • Mounting collar
  • Signal conditioning

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Phone +33 1 46 91 93 32