Stainless Steel Encoders Take Harsh Duty In Stride

Category: Tech Tips

When the going gets tough, the tough get... Stainless.  

For harsh duty rotary encoder applications, nothing beats the durability of a stainless steel. What do we mean by harsh duty? Manufacturing environments with de-greasers, solvents, disinfectants, cleansers, corrosive liquids or fumes fit the bill. Industry examples are food processing, chemical processing, pulp and paper manufacturing. 

To provide reliable feedback in such demanding operating environments, BEPc offers several Accu-Coder rotary incremental encoder models with housings made of 316 stainless steel.  With several package types and mounting options to choose from, BEPc's stainless steel encoders cover a wide range of applications.

EPC Model 802 stainless steel incremental rotary encoder

Model 802S

Housing Size: 50.8mm diameter 
Housing: Incremental, Shaft 
Material: 316 Stainless Steel
(Housing and shaft) 

Resolution: Up to 30,000 PPR 
Mounting Options: Flange, servo 

Data Sheet

EPC Model 858 stainless steel incremental rotary encoder

Model 858

Housing Size: 58mm diameter 
Type: Incremental, Shaft 
Material: 316 Stainless Steel
(Housing and shaft) 

Resolution: Up to 30,000 PPR 
Mounting Options: Flange, servo 

Data Sheet 

  EPC Model 865T stainless steel incremental encoder. Through-bore for 56C - 184C frame

Model 865T

Housing Size: 58mm diameter
(Fits NEMA sizes 56C - 184C)
Type: Through-bore
Material: 316 Stainless Steel
Resolution: Up to 4,096 PPR
Mounting Options: C-Face, Stainless Steel cover and gasket kit optional

Data Sheet

In addition to the stainless steel housings, we also offer the Model 25T with a Corrosion Resistant option.  The housing of the Model 25T is manufactured of a chemically inert polymer resin, which is by nature resistant to many of the harsh materials listed at the beginning of this article.  With the Corrosion resistant option we take the extra step of replacing all the exposed metal hardware with stainless steel: the shaft collar, screws and other hardware.  The result is a through-bore encoder with can-do capability.

EPC Model 25T Corrosion Resistant Option Incremental Rotary Encoder

Model 25T

Housing Size: 63.5mm diameter 
Housing: Through-bore, hollow bore

Material: Polymer resin (with Corrosion Resistant option stainless steel hardware) 
Resolution: Up to 10,000 PPR 
Mounting Options: Tether, 3-point flex, block and pin

Data Sheet


When applying rotary encoders in harsh conditions, be sure to consider the environmental seal. Generally, the highest IP rating (Ingress Protection) available is preferred, as this choice provides greatest protection to the internal components.  For a detailed explanation of IP ratings, see our Technical Bulletin No. 122, What Is An IP Rating And What Does It Mean?

Also, don't neglect the connector.  The M12 and cable gland connectors offer the best protection against ingress of liquids and are available on BEPc products listed above.

For further discussion of other factors to consider when specifying encoders in inhospitable conditions, see our White Paper 2006, Encoders In Inhospitable Environments.

Share ›