The Leak Detector,refrigerant Gas, cataloged under National Stock Number 4940-01-543-5559, is classified within Federal Supply Class 4940 (Miscellaneous Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Advanced Engineering Ltd. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4940-01-543-5559 |
| Primary Part Number | ZX-1 |
| Item Name | Leak Detector,refrigerant Gas |
| FSC / FSG | 4940 / 49 — Miscellaneous Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Advanced Engineering Ltd |
| Status | ACTIVE |
| 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 |
|---|---|
| ZX-1 | Advanced Engineering Ltd (GBR) |
| Reference | Meaning |
|---|---|
| TIFZX-1 | 3/9 Design control — primary reference Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons |
| TIFZX | 5/9 Secondary reference Spx Corporation Dba O T C Tool & Equip Division Div Spx Corp - Kent-Moore/otc Divisons |
| LD5 | 5/9 Secondary reference Bosch Automotive Service Solutions Inc. |
NSN 4940-01-543-5559 is a Leak Detector,refrigerant Gas, manufactured by Advanced Engineering Ltd, classified under FSC 4940, Miscellaneous Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4940-01-543-5559 has 1 manufacturer part number on file: ZX-1 (Advanced Engineering Ltd).
1 possible match (shared part number, not a government interchangeability claim): 7035-01-664-3412. Verify interchangeability with system specifications before substitution.
Key specifications for ZX-1: Special Features: SIZE: 3.00IN. X 4.80IN. X 15.60IN.; WEIGHT: 2.5LBS.; 16IN. FLEXIBLE STAINLESS PROBE; DETECTS ALL HALOGENATED REFRIGERANTS INCLUDING R-410A; MECHANICAL PUMP PROVIDES INSTANT RESPONSE AND CLEARING; TRI-COLOR VISUAL LEAK SIZE INDICATION; TACTILE KEYPAD CONTROLS A; Part Name Assigned by Controlling Agency: REFRIGERANT LEAK DETECTOR; End Item Identification: MISC. TOOLS FOR REFRIGERATION/AIR CONDITIONING. 0 specifications are 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.