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XR125 (SMARTSafe™) Magnetic Encoder

XR125 SMARTSafe 12.5" modular incremental quadrature rotary encoders are a breakthrough in hazardous duty encoders to fit large shaft applications.  They are ATEX/IECEx and cULus approved and offer incredibly reliable no-bearing construction!  SMARTSafe encoders can be used in ATEX/IECEx gas and dust and UL gas environments.  Also available:  hollow shaft models (XR45, XR47, XR685), shafted models (XR4F, XR485), no-bearing modular encoders to fit other flange sizes (XR56, XR67, XR85, XR115, XR850), and modular sensors (XR5, XR12).

For Level 2 applications requiring ATEX/IECEx Zone 2 or 22 or UL Class I, Division 2, Groups A,B,C,D use the XR125 directly in your application, with no barrier, isolator or cable gland required.

For Level 1 applications requiring ATEX/IECEx Zone 1 or 21 use the XRB1 or XRB2 isolator in your control cabinet which permits the use of intrinsically safe wiring instead of explosion proof conduit or glands. The XR125 can also be used in UL Class I Division 1 and Zone 0 applications using the XRB2 Isolator. 

Unlike the competition, Avtron SMARTSafe encoder systems are protected against short circuits, power-to-output wiring, and output-to-ground faults.

Instead of mounting a tiny optical encoder with weak bearings on a wobbling stub shaft, mount XR125 directly on your main application shaft.  Vibration, shock, liquids, dust and dirt won't harm SMARTSafe XR125 encoders!  Paint booths, draw works, coil tubing rigs...XR125 can keep them all working 24-7-365.

Eliminate the biggest cause of industrial encoder failure--eliminate the bearings with XR125 hazardous duty encoders.

XR125 (SMARTSafe™) Magnetic Encoder

Technical specifications

  • Operating Power

    5-24VDC in/out

  • Current

    In: 10.6V Out: 150mA, In/Out 100mA

  • Output Format

    A Quad B with marker (A,A–, B,B – , Z,Z – )

  • Frequency Range

    0 to 165 KHz

  • Speed

    5000 RPM Max.

  • Environmental


  • Operating Power: (add cable drive current as req'd)
    Level 1 Protection:  12-24VDC In, 10.6V Out, 150mA
    Level 2 Protection:  5-24VDC In/Out, 100mA 
  • Maximum Cable Length
    Level 1 (Local/Remote):  1000' [300m] / 400' [120m]
    Level 2:  500' [150m] @ 5-12V; 200' [60m] @ 24V
  • Rotor Positioning: Up to +/-0.100" [+/-2.54mm] movement/misalignment
  • Sensor-Rotor Gap: 0.045", +0.015/-0.040" [1.14mm+0.38/-1.0]
  • Certifications: 
    Level 1: ATEX/IECEx Zone 1 & Zone 21 Group IIC
    Level 1: cULus Class I, Division 1 and Zone 0 Group A,B,C,D*
    Level 2: ATEX/IECEx Zone 2 & 22 Group IIC
    Level 2: cULus Class I, Division 2 Group A,B,C,D

Latest Application Notes