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171 GuardSwitch Series

Exposion Proof Non-Contact Interlock/Position Switch


The 171 is an interlock/position switch ideal for explosive environments where combustibles are being used such as grain elevators and painting booths. The enclosure is UL classified for: Class I, Group B,C,D; Class II, Group E,F,G; Class III, Divisions 1 & 2.  


-  Explosive Environments
      - Automotive Paint Companies
      - Industrial Paint Companies
      - Grain Mills
      - Chemical/Toxic Environments
      - Fertilizer Manufacturers
-  Enclosure UL classified for hazardous locations classes.
      - Class I, Group B, C, D
      - Class II, Group E, F, G
      - Class III, Divisions 1 & 2

171 GuardSwitch Series

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Catalog Numbers

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Catalog Number

SPDT, 100VA / 84W, 120VAC, 28VDC, 1/2 in. NPT
Black Anodized Aluminum


N.O., 25VA / 25W, 120VAC DC, 1/2 in. NPT
Black Anodized Aluminum


TPST, 100VA / 84W, 120VAC, 28VDC, 1/2 in. NPT, 16/6 Fly lead THHN Blue
Black Anodized Aluminum




Agency Approvals

UL Listed  - Enclosure Only  (E88735)
NEMA Ratings:  1, 2, 5
Protection Class:  IP64


Enclosure:   UL Explosion proof, Die Cast Aluminum

Temperature Range :  -40F to 180F (-40C to 80C)

Environmental:   Hermetically sealed contact switch encapsulated in polyurethane

Response Time:   
 1 msec; 10 msec (150VA)

Life cycles:   100,000 under full load; Up to 200, 000, 000 under dry circuit

Conduit Connection:  1/2" Threaded NPT

Lead Type for 171-M10 / O.D. 16/6 Fly lead THHN Blue / 0.11" (0.28 cm) each O.D.