The Psychrometer, cataloged under National Stock Number 6685-01-137-7972, 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 Alter Harry Co the Div of T E C. Government technical data includes 13 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. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-137-7972 |
| Primary Part Number | 70925 |
| Item Name | Psychrometer |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Alter Harry Co the Div of T E C |
| Status | ACTIVE |
| Handle Type | SOLID |
| Engraved Thermometer Stem | INCLUDED |
| Mounting Panel Tables | PROVIDED |
| Sling Handle | INCLUDED |
| Overall Diameter | 1.000 INCHES NOMINAL IN |
| Circulation Method | HAND SLING |
| Operating Temp Range | +30.0 TO 110.0 FAHRENHEIT DEGF |
| Thermometer Quantity | 2 |
| Mounting Shelter | INCLUDED |
| Magnifying Lens | NOT INCLUDED |
| Material | PLASTIC LOCATION NOT OTHERWISE SPECIFIED |
| Circulation Type | FORCED |
| Thermometer Filling Type | MERCURY |
| 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 |
|---|---|
| 70925 PRIMARY | Alter Harry Co the Div of T E C (USA) |
NSN 6685-01-137-7972 is a Psychrometer, manufactured by Alter Harry Co the Div of T E C, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-137-7972 has 1 manufacturer part number on file: 70925 (Alter Harry Co the Div of T E C).
2 possible matches (shared part number, not a government interchangeability claim): 5120-01-434-9676, 5310-01-717-0926. Verify interchangeability with system specifications before substitution.
Key specifications for 70925: Handle Type: SOLID; Engraved Thermometer Stem: INCLUDED; Mounting Panel Tables: PROVIDED; Sling Handle: INCLUDED. 13 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.