The Transmitter,temperature,electric, cataloged under National Stock Number 6685-01-421-0668, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Signet Scientific Co. Government technical data includes 3 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-01-421-0668 |
| Primary Part Number | P525-1 |
| Item Name | Transmitter,temperature,electric |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Signet Scientific Co |
| Status | ACTIVE |
| Body Length | 1.512 INCHES NOMINAL IN |
| Unit Type | CHEMICAL |
| Material | STEEL CORROSION RESISTING OVERALL |
| 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 |
|---|---|
| P525-1 PRIMARY | Signet Scientific Co (USA) |
| Reference | Meaning |
|---|---|
| MK525-1 | 5/9 Secondary reference Signet Scientific Co |
NSN 6685-01-421-0668 is a Transmitter,temperature,electric, manufactured by Signet Scientific Co, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-421-0668 has 1 manufacturer part number on file: P525-1 (Signet Scientific Co).
1 possible match (shared part number, not a government interchangeability claim): 6680-01-646-9111. Verify interchangeability with system specifications before substitution.
Key specifications for P525-1: Body Length: 1.512 INCHES NOMINAL IN; Unit Type: CHEMICAL; Material: STEEL CORROSION RESISTING OVERALL. 3 specifications are 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.