AMT21 Series

28 mm, 12 or 14 Bit, Single-Turn or Multi-Turn, Absolute, RS-485 Interface, Capacitive Modular Encoder

AMT21 Series
AMT21 Series
AMT21-V Kit

CUI Devices' AMT21 series is a rugged, high accuracy absolute encoder outputting 12 bits or 14 bits of absolute position information with RS-485 communication and single-turn or multi-turn output options. Thanks to its innovative capacitive platform, the series is not susceptible to contaminants such as dirt, dust, and oil that typically plague encoders in industrial environments. The AMT21’s design also simplifies the assembly process, reducing the time-consuming tasks of mounting and alignment to mere seconds with the One Touch Zero™ feature. Combined with an operating temperature range of -40°C to +105°C, high accuracy, a compact package, and low current draw, the AMT21 provides a compelling solution for a range of industrial, automation, robotics, and renewable energy applications.

Get the All-in-One Encoder Kit!

Over 15 encoders in one kit. A flexible platform for development and prototyping, available in distribution for immediate delivery.


  • 12-bit absolute (4096) position or 14-bit absolute (16384) position
  • RS-485 communication
  • Single-turn or multi-turn output options
  • Resilient to dirt and dust
  • Low current draw
  • Modular locking hub design for simple assembly
  • One Touch Zero™ set
  • Compatible with AMT Viewpoint™ GUI
  • -40 to +105°C temperature range


  • Input Voltage (Vdc)
    3.8 ~ 5.5
  • Operating Temp. (°C)
    -40 ~ 105
  • Speed, Max. (RPM)
    4000, 8000


Configured Part Number
Absolute Resolution
Data Rate
RS485 Node Address
Sleeve (Bore) Ø (mm)
Mounting Baseplate