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http://www.nidec-avtron.com/encoders/family/heavy-mill-duty/xr12

Large Bore Hazardous Duty Encoder Sensor

  • • cULus Class I, Div 1 Listed, Groups A,B,C,D
  • • cULus Class I Zone Group IIC
  • • cULus Class I, Div 2 Listed, Groups A,B,C,D
  • • ATEX IECEx Rated: Zone 1 & 2, 21 & 22
  • • Fits Shafts up to 7 7/8" [200mm]
  • • Ideal for Oil and Gas Drilling
  • • Fully Potted Electronics
  • • Up to 8192 PPR
  • • Wide Sensor-Rotor Gap: No Shimming or Scraping
  • • 3 Year No-Hassle Warranty
XR12 SMARTSafe™ modular incremental quadrature encoder sensors enable the world's first hazardous duty rotary encoders with removable electronics.  They are cULus, ATEX and IECEx certified and offer incredibly reliable no-bearing construction!  SMARTSafe sensors can be used in ATEX/IECEx gas and dust and UL gas hazardous environments.  Also available:  hollow shaft models (XR685), shafted models (XR485), no-bearing modular encoders (XR125XR850), and modular sensors for smaller bore applications (XR5).

For Level 2 applications requiring ATEX/IECEx Zone 2 or 22 or cULus Class I, Division 2, Groups A,B,C,D use the XR12 directly in your application, with no barrier, isolator or cable gland required.

For Level 1 applications requiring ATEX/IECEx Zone 1 or 21 protection 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 XR56 can also be used in UL Class I Div 1 & 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 XR12 directly on your machine and install the rotor on your main application or motor shaft.  Vibration, shock, liquids, dust and dirt won't harm SMARTSafe™ XR12 encoders!  Paint booths, draw works, coil tubing rigs...XR12 can keep them all working 24-7-365.

Eliminate the biggest cause of industrial encoder failure--eliminate the bearings with XR12 hazardous duty encoder sensors.