The Hygrometer,dial Indicating, cataloged under National Stock Number 6685-01-583-4223, 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 Extech Instruments Corporation Dba Extech Data Systems Div. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-583-4223 |
| Primary Part Number | RH101 |
| Item Name | Hygrometer,dial Indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Extech Instruments Corporation Dba Extech Data Systems Div |
| Status | ACTIVE |
| Measurement Type | DIGITAL |
| Pointer/pen Type and Quantity | 1 RECORDING SINGLE |
| Features Provided | PROTECTIVE COVER AND MOUNTING HARDWARE |
| Unit Type | DIAL INDICATING |
| Functional Description | HUMIDITY AND AIR TEMP MEASUREMENTS PLUS INFRARED THERMOMETER FOR NON-CONTACT SURFACE TEMPS |
| Material | PLASTIC 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 |
|---|---|
| RH101 PRIMARY | Extech Instruments Corporation Dba Extech Data Systems Div (USA) |
NSN 6685-01-583-4223 is a Hygrometer,dial Indicating, manufactured by Extech Instruments Corporation Dba Extech Data Systems Div, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-583-4223 has 1 manufacturer part number on file: RH101 (Extech Instruments Corporation Dba Extech Data Systems Div).
Key specifications for RH101: Overall Height: 5.900 INCHES NOMINAL IN; Measurement Type: DIGITAL; Overall Length: 2.950 INCHES NOMINAL IN; Pointer/pen Type and Quantity: 1 RECORDING SINGLE. 6 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.