The Humidifier,special, cataloged under National Stock Number 4920-01-288-1766, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Thermo Environmental Instruments Llc Div Environmental and Process Monitoring. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-288-1766 |
| Primary Part Number | 33-3025 |
| Item Name | Humidifier,special |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Thermo Environmental Instruments Llc Div Environmental and Process Monitoring |
| Status | ACTIVE |
| FSC Application Data | GAS ANALYZER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 33-3025 PRIMARY | Thermo Environmental Instruments Llc Div Environmental and Process Monitoring (USA) |
| Reference | Meaning |
|---|---|
| 33-3025 | 5/9 Secondary reference Gas Tech, Inc |
NSN 4920-01-288-1766 is a Humidifier,special, manufactured by Thermo Environmental Instruments Llc Div Environmental and Process Monitoring, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-288-1766 has 1 manufacturer part number on file: 33-3025 (Thermo Environmental Instruments Llc Div Environmental and Process Monitoring).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-648-1584. Verify interchangeability with system specifications before substitution.
Key specifications for 33-3025: FSC Application Data: GAS ANALYZER. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.