The Thermometer-Hygrometer, cataloged under National Stock Number 6685-01-588-4791, 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 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-588-4791 |
| Primary Part Number | 445703 |
| Item Name | Thermometer-Hygrometer |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Extech Instruments Corporation Dba Extech Data Systems Div |
| Status | ACTIVE |
| Mounting Facility Type and Quantity | 1 WALL BRACKET |
| Display Digit Quantity | 6 |
| Measurement Type | DIGITAL |
| Display Type | LIQUID CRYSTAL |
| Switch Type and Quantity | 1 PUSH BUTTON |
| Measurement Range | +14.0 TO 140.0 DEG FAHRENHEIT AND +10.0 TO 85.0 PERCENT RELATIVE HUMIDITY |
| Voltage Rating in Volts | 1.5 DC NOMINAL |
| 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 |
|---|---|
| 445703 PRIMARY | Extech Instruments Corporation Dba Extech Data Systems Div (USA) |
| Reference | Meaning |
|---|---|
| 10490264 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 6685-01-588-4791 is a Thermometer-Hygrometer, 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 6685-01-588-4791 has 1 manufacturer part number on file: 445703 (Extech Instruments Corporation Dba Extech Data Systems Div).
Key specifications for 445703: Mounting Facility Type and Quantity: 1 WALL BRACKET; Display Digit Quantity: 6; Measurement Type: DIGITAL; Display Type: LIQUID CRYSTAL. 7 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.