# RLS AksIM-4 Dual Concentric Off-Axis Absolute Encoder

![RLS AksIM-4 Dual Concentric Off-Axis Absolute Encoder](https://parts.trymaglev.com/img/ac-rls-aksim-4-dual-concentric.webp)

Two 19-bit absolute off-axis encoders in one ultra-thin ring (motor + reducer output), launched 2026 for humanoid and cobot joints.

- Maglev ID: ac-rls-aksim-4-dual-concentric
- Brand: RLS
- MPN: AksIM-4 Dual Concentric
- Category: actuators / Joint Encoders
- Origin: SI (maker HQ, factory not confirmed)
- Maker: RLS d.o.o. (brand, SI)
- NDAA: unknown · Blue UAS: unknown · FCC: n/a
- HTS: 9031.80.80.85 (typical)
- MOQ: unknown · Lead time: unknown
- Confidence: VERIFIED

## Price
- No public price. Request a quote via POST /api/rfq or the order pad.

## Specifications
- Resolution: 19-bit input + 19-bit output encoder
- Interface: Connector or board-to-board version (protocol not stated on page)
- Type: Dual concentric off-axis magnetic absolute encoder

## Links
- Product: https://www.rls.si/eng/aksim-dual
- Datasheet: none
- CAD: none

## Equivalents
- RLS AksIM-2 Off-Axis Absolute Rotary Encoder (ac-rls-aksim-2)
- KingKong DPT Series Robot Joint Dual Magnetic Encoder, 24-bit (ac-kingkong-dpt)

## Sources
- https://www.rls.si/eng/aksim-dual (specs: 19+19 bit, up to ±0.006°, 4.5-5.5 V, -40 to +105 °C)
- https://www.rls.si/cn/news/aksim4-dual-concentric-launch (launch news 2026-02-11, samples available)