Product Overview
Killark SPM25122 Explosion-Proof Enclosure - Copper-Free Aluminum, FM Approved, Dual Conduit Hubs
Condition
Used condition - never installed. Originally housed a GasTech gas sensor module assembly; the sensor has been removed and this listing is for the enclosure only. Cast aluminum body is clean with no corrosion, chips, or visible wear. Markings legible: KILLARK CAT. NO. SPM25122, date code 1298, UL 66Y8, FM Approved, P/N 16431AAEB, and stamped cross-reference code 67-0027-03-02. Interior is clean; cross-shaped mount plate and fastener points intact. Sourced from a government research facility.
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Product Overview
Hubbell Killark SPM25122 is a heavy-duty explosion-proof gas diffusion transmitter enclosure built for hazardous locations where flammable vapors or combustible dust are present. The two-piece cast aluminum body - copper-free alloy construction - features a bolt-on cover with machined seating ring, two mounting ears, and threaded conduit hubs for integration into a hazardous location conduit system. FM Approved and UL listed (UL 66Y8). Cross-referenced as GasTech 67-0027-03-02 housing, it is the certified shell for legacy GasTech diffusion gas sensor assemblies including O2 monitoring platforms. The enclosure itself ships without a sensor; buyers supply the compatible transmitter module.
Key Features
- Explosion-proof enclosure rated for hazardous locations - FM Approved, UL 66Y8 listed
- Copper-free aluminum alloy construction - corrosion-resistant, suitable for harsh industrial environments
- Bolt-on cover with machined parting-line seating ring for reliable seal integrity
- Threaded conduit hubs on body sides for standard hazardous location conduit connections
- 2 mounting ears with bolt holes for secure fixture to structure or panel
- Compatible with legacy GasTech gas detection sensor assemblies (cross-reference: 67-0027-03-02)
- Interior cross-shaped mount plate with two screw points for sensor module retention
- Date code 1298; P/N 16431AAEB; also listed as Killark M-HKB Gas Tech Box
Applications
- Maintenance technician replacing a corroded or damaged enclosure on an existing fixed gas detection system in a chemical plant or oil refinery - drop-in housing that matches the original GasTech conduit layout and bolt pattern
- OEM or system integrator building a new O2 or combustible gas monitoring station who needs a pre-certified explosion-proof shell without the lead time or cost of custom fabrication
- Facilities engineer upgrading a hazardous location gas detection network and sourcing a spare certified housing for sensor swap-outs during scheduled maintenance windows
- Industrial MRO program stocking a certified replacement enclosure for Class I hazardous area gas transmitter installations where a failed housing must be swapped to restore compliance
Frequently Asked Questions
Is the gas sensor included?
No. The sensor module assembly has been removed. This listing is for the SPM25122 enclosure only - the cast aluminum body, cover, and internal mount plate. A compatible GasTech diffusion transmitter module would need to be sourced separately.
What certifications does this enclosure carry?
FM Approved and UL listed (UL 66Y8), as molded and labeled on the unit. Buyers should verify that these certifications satisfy their specific site classification and applicable electrical code requirements before installation.
What conduit size do the hubs accept?
The conduit hubs are threaded. Specific thread size is not confirmed from available markings. Buyers should measure the hub threads directly or cross-reference the SPM25122 documentation for their installation.
Is this compatible with sensors other than GasTech?
The enclosure is cross-referenced as GasTech 67-0027-03-02 housing and is confirmed compatible with legacy GasTech diffusion sensor assemblies. Compatibility with other sensor brands depends on physical fit to the interior mount plate dimensions and electrical connection requirements. Buyers integrating a different sensor module should verify fit before ordering.
What does the interior look like?
Interior markings read 5950A, 3Y, VOL, CL/UN. A cross-shaped mount plate with two screw points is present. Cover threads are clean with no corrosion. No sensor, wiring, or hardware beyond the base enclosure is included.
A certified explosion-proof housing pulled from a government research facility - clean, never installed, carrying its original FM and UL markings. The sensor that lived inside is gone; the story of what gets installed next is yours to write.
