# Same Sky (CUI) AMT21 Absolute Modular Encoder (RS-485)

![Same Sky (CUI) AMT21 Absolute Modular Encoder (RS-485)](https://parts.trymaglev.com/img/ac-samesky-amt21.webp)

28 mm capacitive absolute encoder, 12- or 14-bit, single- or multi-turn, RS-485; drop-in absolute upgrade for AMT10-class mounts.

- Maglev ID: ac-samesky-amt21
- Brand: Same Sky (formerly CUI Devices)
- MPN: AMT21 series (e.g., AMT212A-F1-54-2000-S)
- Category: actuators / Joint Encoders
- Origin: US (maker HQ, factory not confirmed)
- Maker: Same Sky (formerly CUI Devices) (brand, US)
- 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: 12-bit or 14-bit
- Interface: RS-485
- Type: Absolute, capacitive, modular; single- or multi-turn

## Links
- Product: https://www.sameskydevices.com/product/motion-and-control/rotary-encoders/absolute/modular/amt21-series
- Datasheet: https://www.sameskydevices.com/product/resource/amt21.pdf
- CAD: none

## Equivalents
- Same Sky (CUI) AMT102-V Capacitive Incremental Encoder (ac-samesky-amt102-v)
- ams OSRAM AS5047P Adapter Board (ac-ams-as5047p-ts-ek-ab)
- ODrive Encoder OA1 On-Axis Magnetic Encoder, RS485 (ac-odrive-enc-oa1)

## Sources
- https://www.sameskydevices.com/product/motion-and-control/rotary-encoders/absolute/modular/amt21-series (resolution, interface, datasheet)