AI25 C1D2 Certified Encoder  

Compact Encoder Certified for UL Class 1 Div 2 Hazardous Environments

The AI25 Class 1 Division 2 hazardous series AI25 encoder is ideal for Class 1 Division 2 applications where an over-specified zone 1 or division 1 encoder may have previously been used, offering cost savings in a smaller overall form factor. It features both BiSS and SSI communication protocols and is available in both shafted and hub shafted mounting designs to offer the integration flexibility engineers need.

  • UL Rated for Class 1 Division 2 Group A, B, C, D Hazardous Applications
  • Compact form factor with Pre-certified 30 Foot PLTC Cable Assembly Included
  • Up to 34 Bits of Total Resolution: 22 Bit ST and 12 Bit Multi-turn
  • Wide Operating Temperature Range -40 to 80ºC
  • 2.5” Diameter Encoder with Shafted and Hub Shafted Mounting Options




Standard Operating Characteristics

Single-turn Resolution: 12, 13, 14, 17, 18, 19, 22 Bits
Multi-turn Resolution: 12 Bit MT (available with 12, 13, 14, 17, 19, 22 Bit ST resolution)
Supply Voltage: 5 VDC or 7-30 VDC ±10%

 Mechanical and Environmental

Mounting Style: Shafted or Hub-shafted
Shaft Sizes: 6, 12 mm, 3/8"
Hubshaft Sizes: 10, 12 mm, 3/8", 1/2"
Operating Temperature: -40°C to +80°C
Enclosure Rating IP64 or IP66

Encoder Protocol

Interface SSI or BiSS
Frequency Response (Baud Rate) 500 kHz


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The AI25 C1D2 Absolute Encoder is ideal for a variety of hazardous oil and gas, agriculture and factory automation automation applications including:

  • Position Feedback
  • Drilling Equipment
  • Draw Works
  • Pipe Handling
  • Petro Chemistry
  • Cranes & Hoists
  • Winches