The Sensor,humidity, cataloged under National Stock Number 6685-01-461-4571, 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 Newport Scientific Inc Hygrodynamic Products Div. 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 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 | 6685-01-461-4571 |
| Primary Part Number | 4818 |
| Item Name | Sensor,humidity |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Newport Scientific Inc Hygrodynamic Products Div |
| Status | ACTIVE |
| Color | YELLOW |
| 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 |
|---|---|
| 4818 PRIMARY | Newport Scientific Inc Hygrodynamic Products Div (USA) |
NSN 6685-01-461-4571 is a Sensor,humidity, manufactured by Newport Scientific Inc Hygrodynamic Products Div, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-461-4571 has 1 manufacturer part number on file: 4818 (Newport Scientific Inc Hygrodynamic Products Div).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-687-5249. Verify interchangeability with system specifications before substitution.
Key specifications for 4818: Color: YELLOW; Special Features: RH RANGE @ 80 DEG F 23 TO 42%;ACCURACY +/- 1% RH;QUICK RESPONSE;3 SECONDS FOR 65% CHANGE; HYGROSENSOR IS TRANDSDUCER CONSISTING OF A BIFILAR WINDING OF PALLADIUM WIRE ON A POLYSTYRENE CORE COATED WITH A HYGROSCOPIC FILM DEGF. 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.