The Bolometer,radio Frequency, cataloged under National Stock Number 6625-01-540-2222, is classified within Federal Supply Class 6625 (Electrical and Electronic Properties Measuring and Testing Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6625-01-540-2222 |
| Primary Part Number | A31U29821-2 |
| Item Name | Bolometer,radio Frequency |
| FSC / FSG | 6625 / 66 — Electrical and Electronic Properties Measuring and Testing Instruments |
| Manufacturer | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
| Status | ACTIVE |
| Sensing Element Type | THERMISTOR |
| Battery Case | NOT PROVIDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Shelf Life Code | 0 |
| Criticality Code | X |
| Unit of Issue | EA |
| Acquisition advice code | VT |
| Weight | 1.0000 lbs |
| Cube | 0.3542 cu ft |
| Part Number | Manufacturer |
|---|---|
| A31U29821-2 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple (USA) |
| Reference | Meaning |
|---|---|
| A31U29821 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| A31U29821-2 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 6625-01-540-2222 is a Bolometer,radio Frequency, manufactured by Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple, classified under FSC 6625, Electrical and Electronic Properties Measuring and Testing Instruments. Status: active.
NSN 6625-01-540-2222 has 1 manufacturer part number on file: A31U29821-2 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple).
Key specifications for A31U29821-2: Sensing Element Type: THERMISTOR; Overall Length: 6.500 INCHES NOMINAL IN; Battery Case: NOT PROVIDED; Special Features: DIMENSION AND TOLERANCE PER ANSI Y14.5M-1982; POWER RANGE -20.0DBM TO +20.0DBM PEAK OR -30.0DBM TO +20.0DBM CW; RF CONNECTION IS TYPE N 50 OHM; FREQUENY RANGE IS 45.0MHZ TO 18.0GHZ SENSOR HAS CONNECTION PROVIDED FOR TRIGGER INPUT, SAMPLE DELAY OUTPUT, AND DETECTOR OUT; THIS IS A MODIFIED 80350A POWER SENSOR GHz. 2 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.
NSN 6625-01-540-2222 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.