Products and Solutions
Rotary Encoders
Hazardous Area Encoders

UL, IECEx & ATEX Encoders for Hazardous Areas

ATEX encoders and other hazardous area encoders are used where flammable liquids, vapors, gases or combustible dusts are likely to occur including oil & gas exploration, grain silos as well as paint and other chemical production. Dynapar offers several rotary encoders designed for these environments with varying degrees of zone and class/div protection ratings and certified by organizations including UL rated encoders, ATEX encoders, IECEx and CSA. Intrinsically safe encoders are used in conjunction with a barrier which limits the energy in the encoder so that any arcs or sparks do not have enough energy to ignite.

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UL & ATEX Rated Encoders for Hazardous Areas:

UL Class 1 Div 1 Encoders (when used with an intrinsically safe barrier)

ISD25 Intrinsically Safe Encoder

Incremental hubshaft encoder, IP67 sealing, 400G shock and 20G vibration rated. ATEX, IECEx, CSA triple certified. Must use encoder with an intrinsi...

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ISD37 Intrinsically Safe Encoder

Incremental hollow-shaft encoder, IP67 sealing, 400G shock and 20G vibration rated. ATEX, IECEx, CSA triple certified. Must use encoder with an intr...

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ISW38 Draw Works Encoder

Draw works threaded incremental encoder, IP67 sealing, 400G shock and 20G vibration rated. ATEX and CSA certified. Must use encoder with an intrinsi...

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HD20 Haz Intriniscally Safe Encoder

Size 20 incremental hazardous duty encoder with dual isolated output option. IP67 rated, ATEX and CSA certified. Must use encoder with an intrinsica...

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HD25 Haz Intrinsically Safe Encoder

Size 25 incremental hazardous duty encoder with dual isolated output option. IP67 rated, ATEX and CSA certified. Must use encoder with an intrinsica...

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X25 Explosion Proof Encoder

Rugged explosion proof incremental encoder with cast iron housing approved for NEC Class 1&2, Div 1&2, Groups C,D,E,F,G.

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ATEX Encoders for Zone 1 Applications

AX70/ 71 Flameproof ATEX Encoder

Absolute encoder with up to 22 bit single turn resolution, IP67 rated. ATEX and IECEx certified. BiSS, CANOpen, Profibus, DeviceNet or SSI interface...

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AX65 Flameproof ATEX Encoder

Absolute encoder with IP66/67, 200G shock and 30G vibration rating. ATEX and IECEx certified. CANOpen or SSI interfaces available.

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EN44 Zone 1 Hubshaft Encoder

Incremental encoder with encapsulated electronics eliminates need for IS barrier. ATEX, CSA and IECEx triple certified. High current line driver, wi...

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EN42 Zone 1 Hollow Shaft Encoder

Incremental encoder with encapsulated electronics with increased safety interface eliminates need for IS barrier. ATEX, CSA and IECEx triple certified...

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UL Class 1 Div 2 Encoders

HSD35 D2 Non Incendive Encoder

Incremental encoder, IP67, 400G shock, 20G vibration rating. Optional dual isolated outputs for redundancy and field serviceable connectors.

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AI25 UL C1D2 Absolute Encoder

Absolute encoder with up to 22 bit single turn resolution, IP66 rated, UL C1D2 rated for hazardous locations, SSI or BiSS interface options

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Frequently Asked Questions about ATEX Encoders

What are ATEX encoders?

ATEX encoders confirm to the requirements of the ATEX 214 equipment directive for potentially explosive atmospheres. A certification of compliance and mark issued by a certifying body authorizes the use of the encoder in a specific explosive environment with a specific level of risk.

What are Ex encoders?

The term Ex is a general term referring to encoders and sensors that qualify for use in a Hazardous or Explosive environment versus a Safe or General Purpose area. To support correct specification an equipment manufacturer will want to know what standard(s) and area classification needs to be met.

What are the different types of ATEX encoders?

ATEX encoders are classified by the area or Zone they are qualified to operate in, whether the hazard is gas or dust, the technique used for protection and the maximum safe operating temperature. A product marking will be issued by the certifying body for the specific area which can be seen on each product datasheet.

What are common protection methods used in ex encoder design?

Depending on the area classification and market preferences, manufacturers will commonly design product for ATEX compliance using Flameproof (similar to explosion proof), Intrinsically Safe, Increased Safety, Non Incendiary and Encapsulation techniques, as well as combinations of techniques. Choose the device that meets the Area Classification first, followed by other application preferences.

Learn more about hazardous area encoders and protection methods here