The Indicator,carbon Monoxide, cataloged under National Stock Number 6665-01-481-4193, is classified within Federal Supply Class 6665 (Hazard-detecting Instruments and Apparatus) of the Instruments and Laboratory Equipment group. The manufacturer of record is Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6665-01-481-4193 |
| Primary Part Number | C091IS |
| Item Name | Indicator,carbon Monoxide |
| FSC / FSG | 6665 / 66 — Hazard-detecting Instruments and Apparatus |
| Manufacturer | Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc |
| Status | ACTIVE |
| Detecting Element Type | ANY ACCEPTABLE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| C091IS PRIMARY | Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc (USA) |
| Reference | Meaning |
|---|---|
| C091EX | 5/9 Secondary reference Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc |
NSN 6665-01-481-4193 is a Indicator,carbon Monoxide, manufactured by Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc, classified under FSC 6665, Hazard-detecting Instruments and Apparatus. Status: active.
NSN 6665-01-481-4193 has 1 manufacturer part number on file: C091IS (Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc).
Key specifications for C091IS: Detecting Element Type: ANY ACCEPTABLE; Special Features: MONITOR CALIBRATION SHOULD BE DONE MONTHLY TO ENSURE ACCURACY; MFGR NAME INTRINSICALLY SAFE CO MONITOR; End Item Identification: NHA MODEL BB50-COAAP; END ITEM BREATHER BOX 4240-21-920-8077. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.