The Pyrometer,indicating, cataloged under National Stock Number 6685-00-892-1589, 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 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6685-00-892-1589 |
| Item Name | Pyrometer,indicating |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Scale Calibration | CALIBRATED TO IRON CONSTANT ON THERMOCOUPLE |
| Scale Accuracy Rating | 0.05 PCT ACCURACY RATING |
| Measurement Type | MILLIVOLT CIRCUIT |
| Pointer/pen Type and Quantity | 1 INDICATING SINGLE |
| Scale Type | ECCENTRIC |
| Case Type | HINGED LID CARRYING CASE W/HANDLE |
| Scale Measurement Range | +1010.000 TO 1020.000 DEG FAHRENHEIT |
| Scale Length | 12.000 INCHES NOMINAL IN |
| Reference Number Differentiating Characteristics | STD CELL ENCAPSULATED PER LEED-NORTHRUP E. I. C. 121592 |
| 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 |
|---|---|
| 8686 | 3/9 Design control — primary reference Leeds and Northrup Co a Unit of General Signal Corp |
NSN 6685-00-892-1589 is a Pyrometer,indicating, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 9390-01-645-8226. Verify interchangeability with system specifications before substitution.
Key specifications for 6685-00-892-1589: Scale Calibration: CALIBRATED TO IRON CONSTANT ON THERMOCOUPLE; Scale Accuracy Rating: 0.05 PCT ACCURACY RATING; Measurement Type: MILLIVOLT CIRCUIT; Overall Length: 14.313 INCHES NOMINAL IN. 9 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.