Michigan Scientific · slip ring
SR20AW/E512/AX slip ring
Up to 36 circuits plus speed, angle and direction of rotation, from one housing on the end of the shaft.
SR20AW/E512/AX is the SR20AW/ERT with: Rotation sensor: Encoder, 512 ppr (E512) · Rotor connection: Axial circular connector (A) · Stator connection: Circular connector (X). The weatherproof build of the outline drawing, with connectors on rotor and stator.
Model SR20AW/ERT
10 circuits. 63.5 mm rotor, sealed against dust. The rotation sensor and the connections are chosen in the configurator. SR10A/ERT: Datasheet PDF
10 circuits. 63.5 mm rotor, contacting rotary seals. The rotation sensor and the connections are chosen in the configurator. SR10AW/ERT: Datasheet PDF
10 circuits. 50.8 mm rotor, sealed against dust. The rotation sensor and the connections are chosen in the configurator. SR10M/ERT: Datasheet PDF
10 circuits. 50.8 mm rotor, contacting rotary seals. The rotation sensor and the connections are chosen in the configurator. SR10MW/ERT: Datasheet PDF
20 circuits. 63.5 mm rotor, sealed against dust. The rotation sensor and the connections are chosen in the configurator. SR20A/ERT: Datasheet PDF
20 circuits. 63.5 mm rotor, contacting rotary seals. The rotation sensor and the connections are chosen in the configurator. SR20AW/ERT: Datasheet PDF
20 circuits. 50.8 mm rotor, sealed against dust. The rotation sensor and the connections are chosen in the configurator. SR20M/ERT: Datasheet PDF
20 circuits. 50.8 mm rotor, contacting rotary seals. The rotation sensor and the connections are chosen in the configurator. SR20MW/ERT: Datasheet PDF
36 circuits. 63.5 mm rotor, sealed against dust. The rotation sensor and the connections are chosen in the configurator. SR36A/ERT: Datasheet PDF
36 circuits. 63.5 mm rotor, contacting rotary seals. The rotation sensor and the connections are chosen in the configurator. SR36AW/ERT: Datasheet PDF
36 circuits. 50.8 mm rotor, sealed against dust. The rotation sensor and the connections are chosen in the configurator. SR36M/ERT: Datasheet PDF
36 circuits. 50.8 mm rotor, contacting rotary seals. The rotation sensor and the connections are chosen in the configurator. SR36MW/ERT: Datasheet PDF
Common configurations SR10AW/E512/AXSR20AW/E512/AXSR36AW/E512/AXSR10AW/T512/AXSR36MW/T512/X
- 20
- Circuits
- 2 000 rpm
- Max speed
- 63.5 mm
- Rotor diameter
- 512 ppr
- Encoder
- 93 mm · 425 g
- Length · weight
- 10
- Circuits
- 10 000 rpm
- Max speed
- 63.5 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 80 mm · 397 g
- Length · weight
- 10
- Circuits
- 2 000 rpm
- Max speed
- 63.5 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 80 mm · 397 g
- Length · weight
- 10
- Circuits
- 10 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 80 mm · 397 g
- Length · weight
- 10
- Circuits
- 2 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 80 mm · 397 g
- Length · weight
- 20
- Circuits
- 4 000 rpm
- Max speed
- 63.5 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 93 mm · 425 g
- Length · weight
- 20
- Circuits
- 2 000 rpm
- Max speed
- 63.5 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 93 mm · 425 g
- Length · weight
- 20
- Circuits
- 4 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 93 mm · 425 g
- Length · weight
- 20
- Circuits
- 2 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 93 mm · 425 g
- Length · weight
- 36
- Circuits
- 2 400 rpm
- Max speed
- 63.5 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 115 mm · 482 g
- Length · weight
- 36
- Circuits
- 2 000 rpm
- Max speed
- 63.5 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 115 mm · 482 g
- Length · weight
- 36
- Circuits
- 2 400 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 115 mm · 482 g
- Length · weight
- 36
- Circuits
- 2 000 rpm
- Max speed
- 50.8 mm
- Rotor diameter
- 256 to 512 ppr
- Encoder, optional
- 115 mm · 482 g
- Length · weight
- Max speed with weatherproof seals2 000 rpm
- Max current per circuit500 mA
01 · The essential
Circuits, seals and rotation sensor to choose
The slip ring mounts on the end of a rotating shaft. Gold alloy rings connect strain gages, thermocouples or other sensors on rotating machinery, with 0.5 A per connection and a peak resistance variation of 0.1 Ω at most. The rotation sensor measures rotational velocity, angular position and direction of rotation, and uses none of the slip ring circuits. Every model also exists without it.
Speed depends on the number of rings: 10 000 rpm with 10, 4 000 rpm with 20, 2 400 rpm with 36. With the contacting weatherproof seals (W) the limit is 2 000 rpm, which covers most wet-weather uses such as automotive wheels. Sealed units can survive days of total submersion.
Housings are 80 to 115 mm long, depending on the number of rings, and weigh 400 to 480 g. The rotor is high-strength stainless steel and the stator is nickel-plated aluminum, with threaded holes for a rotation restraint. Rotor and stator take circular connectors or solder terminals; the connection information is engraved on the housing.
02 · Specifications
The numbers
| Circuits | 10 |
|---|---|
| Max speed | 10 000 rpm |
| Rotor diameter | 63.5 mm |
| Weatherproof | no |
| Seals | none, sealed against dust |
| Length | 80 mm |
| Weight | 397 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 10 |
|---|---|
| Max speed | 2 000 rpm |
| Rotor diameter | 63.5 mm |
| Weatherproof | yes |
| Seals | contacting rotary seals (W) |
| Length | 80 mm |
| Weight | 397 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 10 |
|---|---|
| Max speed | 10 000 rpm |
| Rotor diameter | 50.8 mm |
| Weatherproof | no |
| Seals | none, sealed against dust |
| Length | 80 mm |
| Weight | 397 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 10 |
|---|---|
| Max speed | 2 000 rpm |
| Rotor diameter | 50.8 mm |
| Weatherproof | yes |
| Seals | contacting rotary seals (W) |
| Length | 80 mm |
| Weight | 397 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 20 |
|---|---|
| Max speed | 4 000 rpm |
| Rotor diameter | 63.5 mm |
| Weatherproof | no |
| Seals | none, sealed against dust |
| Length | 93 mm |
| Weight | 425 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 20 |
|---|---|
| Max speed | 2 000 rpm |
| Rotor diameter | 63.5 mm |
| Weatherproof | yes |
| Seals | contacting rotary seals (W) |
| Length | 93 mm |
| Weight | 425 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 20 |
|---|---|
| Max speed | 4 000 rpm |
| Rotor diameter | 50.8 mm |
| Weatherproof | no |
| Seals | none, sealed against dust |
| Length | 93 mm |
| Weight | 425 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 20 |
|---|---|
| Max speed | 2 000 rpm |
| Rotor diameter | 50.8 mm |
| Weatherproof | yes |
| Seals | contacting rotary seals (W) |
| Length | 93 mm |
| Weight | 425 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 36 |
|---|---|
| Max speed | 2 400 rpm |
| Rotor diameter | 63.5 mm |
| Weatherproof | no |
| Seals | none, sealed against dust |
| Length | 115 mm |
| Weight | 482 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 36 |
|---|---|
| Max speed | 2 000 rpm |
| Rotor diameter | 63.5 mm |
| Weatherproof | yes |
| Seals | contacting rotary seals (W) |
| Length | 115 mm |
| Weight | 482 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 36 |
|---|---|
| Max speed | 2 400 rpm |
| Rotor diameter | 50.8 mm |
| Weatherproof | no |
| Seals | none, sealed against dust |
| Length | 115 mm |
| Weight | 482 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
| Circuits | 36 |
|---|---|
| Max speed | 2 000 rpm |
| Rotor diameter | 50.8 mm |
| Weatherproof | yes |
| Seals | contacting rotary seals (W) |
| Length | 115 mm |
| Weight | 482 g |
| Length and weight given for | 63.5 mm rotor, connectors, encoder |
| Mounting | End of shaft |
| Embedded amplifier | None |
| Encoder | 256 to 512 ppr, optional |
| Rotation sensor choices | encoder 256, 360, 500 or 512 ppr, with or without analog outputs; resolver; none |
| Current per circuit | 500 mA |
| Max peak noise | 0.1 Ω |
| Operating temperature | −40 to 100 °C |
| Rotor contacts | circular connector or solder terminals |
| Stator contacts | circular connector or solder terminals |
Values from the current product page.
03 · Configure
Request a quote
Pick the model, then the rotation sensor and the connections. The summary becomes your quote request.
04 · Resources
Resources
Datasheets and manuals
Drawings
CAD models
None for SR10A/ERT.
Datasheets and manuals
Drawings
CAD models
None for SR10AW/ERT.
Datasheets and manuals
Drawings
CAD models
None for SR10M/ERT.
Datasheets and manuals
Drawings
CAD models
None for SR10MW/ERT.
Datasheets and manuals
CAD models
None for SR20A/ERT.
Datasheets and manuals
CAD models
None for SR20AW/ERT.
Datasheets and manuals
CAD models
None for SR20M/ERT.
Datasheets and manuals
CAD models
None for SR20MW/ERT.
Datasheets and manuals
Drawings
CAD models
None for SR36A/ERT.
Datasheets and manuals
Drawings
CAD models
None for SR36AW/ERT.
Datasheets and manuals
Drawings
CAD models
None for SR36M/ERT.
Datasheets and manuals
Drawings
CAD models
None for SR36MW/ERT.
05 · Applications
Related applications
-
Powertrain Accessory belt pulley torque Torque on an accessory drive pulley, from strain gages on the pulley and a slip ring on the shaft end. -
Engine Crankshaft measurements Torque, bending and strain on your own crankshaft with the engine running, in the vehicle or on the dyno. -
Efficiency Vehicle efficiency and power mapping Torque and speed measured at each driveline stage, from engine to wheel, so each power loss has a location. -
Turbines Wind turbine strain Strain on the blades and in the gearbox of a wind turbine, brought off the rotor by a slip ring.
06 · Related
If the SR/ERT Series is not the one
- 60 ppr is enough SR10AW/E60/A
Weatherproof, 10 circuits, 60 ppr encoder, connector on the rotor.
- Inside a small bore SR20/75/W
20 circuits in a 0.75 in diameter rotor and stator.
- More circuits SR45A-AXHS and SR60A-AXHS
End of shaft, 45 or 60 circuits, 4 000 rpm.
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