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Fits NEMA 8.5" Flanges Fits Shafts up to 4 1/2" [115mm] ATEX/IECEx Rated for Zone 1, 2, 21 & 22 Applications Ideal for Oil and Gas Drilling No Bearings to Wear Out Up to 5000 PPR Self-Diagnostic LED and Alarm Output 3 Year No-Hassle Warranty cULus Class I Division 1 Groups A,B,C,D Listed cULus Class I Zone 0 Group IIC cULus Class I Division 2 Groups A,B,C,D Listed

Click to view the XR850 Series Datasheet in *.pdf format

XR850 SMARTSafe 8.5" modular incremental quadrature rotary encoders are a breakthrough in hazardous duty encoders. They are ATEX/IECEx, cULus approved and offer reliable no-bearing construction! SMARTSafe encoders can be used in UL gas and ATEX/IECEx gas and dust hazardous environments. Also available: hollow shaft models (XR45, XR685), shafted models (XR4F, XR485), no-bearing modular encoders to fit other flange sizes (XR56, XR85, XR115, XR125, XR850), and modular sensors (XR5, XR12).

For applications requiring ATEX/IECEx Zone 2 or 22 or UL Class I, Division 2, Groups A,B,C,D, use the XR850 directly in your application, with no barrier, isolator or cable gland required.

For applications requiring UL Division 1, ATEX/IECEx Zone 1 or 21 use the XRB3 isolator in your control cabinet which permits the use of intrinsically safe wiring instead of explosion proof conduit or glands. The XR850 can also be used in UL Class I, DIV 1 and Zone 0 applications using the XRB3 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 XR850 directly on your main application shaft. Vibration, shock, liquids, dust and dirt won't harm SMARTSafe XR850 encoders! Paint booths, draw works, coil tubing rigs...XR850 can keep them all working 24/7/365.

Eliminate the biggest cause of industrial encoder failure eliminatesthe bearings with XR850 hazardous duty encoders.
Operating Power: (add load and cable drive current as req'd)