The Sensor,air Undercool, cataloged under National Stock Number 6685-01-263-0418, 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 Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-263-0418 |
| Primary Part Number | 123DJ3C |
| Item Name | Sensor,air Undercool |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Manufacturer | Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas |
| Status | ACTIVE |
| General Characteristics Item Description | TO BE USED IN 4.5 INCH DIA. DUCT;WEIGHT 0.75 LBS;SENSOR INCORPORATES AN OUTPUT DELAY OF 140 POM 15 SECONDS;ENVIRONMENT MINUS 65 DEGREES TO 190 DEG F,1.0 TO 15.5 PSIA;ACCURACY 5% FULL SCALE;END FITTING PER MS33514E4;RECEPTACLE TO MATE WITH D38999/26WC8S CONNECTOR KEYING D;PROBE LENGTH 3.76 INCHES POM 0.04 INCH LBS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 123DJ3C PRIMARY | Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas (USA) |
| Reference | Meaning |
|---|---|
| DAA3287P006-105 | 5/9 Secondary reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| DAA3287P006-111 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
| 123DJ3 | 5/9 Secondary reference Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas |
| 00123-0400-3A | 5/9 Secondary reference Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas |
NSN 6685-01-263-0418 is a Sensor,air Undercool, manufactured by Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
NSN 6685-01-263-0418 has 1 manufacturer part number on file: 123DJ3C (Rosemount Aerospace Inc. Dba Rosemount Aerospace Division Div Utas).
Key specifications for 123DJ3C: General Characteristics Item Description: TO BE USED IN 4.5 INCH DIA. DUCT;WEIGHT 0.75 LBS;SENSOR INCORPORATES AN OUTPUT DELAY OF 140 POM 15 SECONDS;ENVIRONMENT MINUS 65 DEGREES TO 190 DEG F,1.0 TO 15.5 PSIA;ACCURACY 5% FULL SCALE;END FITTING PER MS33514E4;RECEPTACLE TO MATE WITH D38999/26WC8S CONNECTOR KEYING D;PROBE LENGTH 3.76 INCHES POM 0.04 INCH LBS; Special Features: SENSOR CHECKS THAT COOLING FLOW AND/OR COOLING TEMPERATURE IS ABOVE FOLLOWING CURVE,25 DEG F AT 7 LB/MIN TO 80 DEG F AT 7.0 TO 8.0 LB/MIN;NORMAL OPERATING RANGE 25 TO 80 DEG F;WHEN THE COOLING FLOW AND/OR COOLING TEMP FALLS BELOW THE CURVE THE SENSOR WILL DETECT INSUFFICIENT COOLING AND SWITCH FROM N.O. TO N.C SWITCH SPDT 2A MIN RATING;8 PIN CONNECTOR;SWITCHING,PINS 3 TO 4 NORMALLY CLOSED;4-5 NORMALLY OPEN; OPERATING VOLTAGE 28 VDC VDC; End Item Identification: PACER SPECIAL. 1 specification is 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.
NSN 6685-01-263-0418 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.