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Overview

MICRO SWITCH EX Series Explosion-Proof Limit Switches, Side Rotary, 1NC 1NO SPDT Snap Action, 0.5 in - 14NPT conduit.
MICRO SWITCH EX Series switches feature the smallest UL-listed housings available for use in hazardous locations. The EX Series switch cavity is designed to cool expanding gases below the ignition temperature of the surrounding explosive atmosphere. The EX Series is capable of switching up to 20 amps while providing ample wiring space for ease of installation. Single and double conduit openings are available. Dual conduit openings may allow for through wiring of multiple switches. The EX Series can be mounted from any of the switch’s four sides.
EX-AR128 Hazardous Area Limit Switches - Honeywell


Technical Specifications

Approvals Div 1 & 2, Class I, Groups B, C, & D; Div 1 & 2, Class II, Groups E, F, & G. II 2 G Ex d IIB + H2 T6 Gb
Agency Approvals and Standards UL, CSA, ATEX, IEC Ex, INMETRO
Series Name EX
Availability Global
Operating Force (OF) 2,22 N to 5,56 N [0.5 lbs to 1.25 lbs]
Pretravel (PT) 5,56 mm [0.219 in] (8°) max.
Release Force 0.25 lb min.
Differential Travel (DT) 0,18 mm [0.007 in] (0.25°) max.
Overtravel (OT) 90° max.
Product Type MICRO SWITCH Explosion-Proof Limit Switches
Actuator Side Rotary
Supply Voltage 125 Vac, 250 Vac, 480 Vac/125 Vdc/250 Vdc
Lever Type
Circuitry 1NC 1NO SPDT Snap Action
Ampere Rating 15 A Ind./ 0.5 A Res./0.25 A Res.
Housing Material Aluminum
Termination Type 0.5 in - 14NPT Conduit
Housing Type EX
Sealing NEMA 1
CSA File # LR57324
UL File # E14274
ATEX File # KEMA 04ATEX2312 X
IEC Ex Yes
Operating Temperature -40°C to 71°C [-40°F to 160°F]
UNSPSC Code 39122213
UNSPSC Commodity 39122213 Limit Switch
Sealed Explosion-proof

Technical Specifications

Approvals Div 1 & 2, Class I, Groups B, C, & D; Div 1 & 2, Class II, Groups E, F, & G. II 2 G Ex d IIB + H2 T6 Gb
Agency Approvals and Standards UL, CSA, ATEX, IEC Ex, INMETRO
Series Name EX
Availability Global
Operating Force (OF) 2,22 N to 5,56 N [0.5 lbs to 1.25 lbs]
Pretravel (PT) 5,56 mm [0.219 in] (8°) max.
Release Force 0.25 lb min.
Differential Travel (DT) 0,18 mm [0.007 in] (0.25°) max.
Overtravel (OT) 90° max.
Product Type MICRO SWITCH Explosion-Proof Limit Switches
Actuator Side Rotary
Supply Voltage 125 Vac, 250 Vac, 480 Vac/125 Vdc/250 Vdc
Lever Type One-Way Roller Lever with Bronze Roller (.75 in dia. x .25 in wide)
Circuitry 1NC 1NO SPDT Snap Action
Ampere Rating 15 A Ind./ 0.5 A Res./0.25 A Res.
Housing Material Aluminum
Termination Type 0.5 in - 14NPT Conduit
Housing Type EX
Sealing NEMA 1
CSA File # LR57324
UL File # E14274
ATEX File # KEMA 04ATEX2312 X
IEC Ex Yes
Operating Temperature -40°C to 71°C [-40°F to 160°F]
UNSPSC Code 39122213
UNSPSC Commodity 39122213 Limit Switch
Sealed Explosion-proof

Documents

TITLE DOCUMENT TYPE LANGUAGE SIZE
EX-AR128 highres photo Photo English 2MB
EX-AR128 lowres photo Photo English 135KB
MICRO SWITCH EX Series Hazardous Location Limit Switches Datasheet English 778KB
50009662: EX Series Explosion-Proof Limit Switches Installation Instructions English 3MB
PK 88012: EX and OP - replacement parts Installation Instructions English 139KB
MICRO SWITCH Hazardous Location Approvals Matrix Hazardous Location Approvals Documentation English 518KB
Guide to Hazardous Location Approvals: MICRO SWITCH Hazardous Area Limit Switches Hazardous Location Approvals Documentation English 2MB
Oil and Gas Brochure Brochure English 4MB
Limit Switch for Hazardous Locations Provides Regulatory Compliance Case Study English 147KB
Sensors and Switches in Valves and Flowmeters Application Note English 2MB
Sensors and Switches in Oil Rig Applications Application Note English 7MB
Industrial Product Line Card Line Card/Selection Chart English 2MB
MICRO SWITCH Hazardous Area Switches Brochure Brochure English 27MB
White Paper: How Switches Can Stop Machines from Going Boom White Paper English 7MB
Technical Note: Electrical Components within Hazardous Location Environments Application Note English 122KB

Product Features

  • NEMA 1
  • Compact, rugged housing
  • Up to 20 amp capacity
  • Ample wiring space
  • Mounts from four sides
  • Roller arms adjustable through 360 degrees
  • Non-sparking actuators
  • Captive cover screws
  • UL, CSA, ATEX (CE), IEC Ex, and INMETRO approvals
  • Grounding screw

Applications

  • Control valves and actuators
  • Petro-chemical plants
  • Conveyors
  • Material handling

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