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explosion proof limit switch

Explosion Proof Limit Switch

Series 54

Flow Line Controls Series 54 hazardous location limit switch has a heavy duty enclosure and provides valve Open & Close indication with a highly visible 3-D indicator and electrical feedback switches. The Series 54 limit switch features Namur mount, two 1/2" conduit entries, adjustable 3-D visual indicators and independently adjustable open and close switches. Options include proximity switches, 4-20 mA and 0-10K ohm potentiometer feedbacks and AS-interface bus technology.

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Aluminum Housing

The Series 54 is UL and CULUS listed Nema 4, 4x, 7 & 9. The rugged cast aluminum housing is polyester coated for corrosion resistance. The cover and visual indicator screws and shaft are stainless steel to provide an additional margin of corrosion resistance Housings include captive cover screws to permit calibration without potential for losing screws. The housing has two ½” conduit entries with option for a third 1/2" or 3/4" conduit entry for field wiring and connections to optional solenoid valves.

Visual Position Indication

The 3-D indicator is highly visible with red & yellow valve closed & open confirmation. It can be easily adjusted by loosening the retaining screws and rotating the plastic dome.

Push to Set Switch Cams

The cams are splined, spring loaded and independently adjustable without the use of tools.


Full line of switches including mechanical SPDT, DPDT, proximity switches, 4-20 mA and potentiometer feedbacks and AS-interface bus.


The terminal strip has two spare terminations to accommodate an optional solenoid valve.