Hollow-Shaft Encoders are intrinsically safe.
Press Release Summary:
Model HS35 (3.5 in. dia) and HS25 (2.5 in. dia) are available with Class I, Division 1, Group C and D ratings when connected to appropriate electrical barriers. Both models feature RS422 compatible output. Encoders can be mounted directly to shafts with diameters ranging from 1/4 to 1 in. Intrinsic safety rating makes them suitable for use in hazardous environments such as industrial process control involving flammable gases, liquids and dusts.
Original Press Release:
Intrinsically Safe Hollow-Shaft Encoders
Goleta - BEI's Industrial Encoder division now provides the international CENELEC hazardous environmental rating for its incremental Hollow-Shaft encoders. Models HS35 (3.5" diameter) and HS25 (2.5" diameter) are available with the Class I, Division
1, Group C and D ratings (Eex ia IIB T4 CENELEC) when connected to the appropriate intrinsic safety electrical barriers. This extends the hazardous environment capabilities offered within the existing HS35 package and introduces the new, smaller hollow-shaft style of HS25 as a solution for these demanding applications. Both encoder styles have the enhanced capability of an RS422 compatible output along with the intrinsic safety rating.
Hollow shaft style encoders can be mounted directly to shafts with diameters ranging from 1/4" up to 1", resulting in a very compact installation. The intrinsic: safety rating is well-suited to providing precision measurement in hazardous environments such as well logging, explosives handling, grain elevators and industrial process control involving flammable gasses, liquids, and dusts.
