The Hygrothermograph, cataloged under National Stock Number 6685-01-649-9989, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-649-9989 |
| Item Name | Hygrothermograph |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Case Type | RECTANGULAR |
| Material | PLASTIC CASE HOLDER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| OPUS20 | 3/9 Design control — primary reference Lufft Usa, Inc. |
NSN 6685-01-649-9989 is a Hygrothermograph, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
Key specifications for 6685-01-649-9989: Overall Length: 166.0 MILLIMETERS NOMINAL MM; Overall Width: 78.0 MILLIMETERS NOMINAL MM; Case Type: RECTANGULAR; Special Features: DEPTH 32 MM; LCD 90X64 MM; INTERFACE USB, LAN; MAX OPERATING TEMPERATURE-20 TO 50 C; MAX ALTITUDE 10000 M ABOVE SEA LEVEL; TEMPERATURE MEASURE - NTC -20 TO 50 C (PLUS/MINUS 0.3); RELATIVE HUMIDITY - CAPACITY , MEASUREMENT RANGE 0-100 PERCENT RH; AIR PRESSURE - RANGE 300-1300 HPA ABS MM. 2 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.