The Counter,airborne Particle, cataloged under National Stock Number 6635-01-306-4527, is classified within Federal Supply Class 6635 (Physical Properties Testing and Inspection) of the Instruments and Laboratory Equipment group. The manufacturer of record is Hach Ultra Analytics Inc. Dba Pacific Scientific Instruments. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6635-01-306-4527 |
| Primary Part Number | 206L |
| Item Name | Counter,airborne Particle |
| FSC / FSG | 6635 / 66 — Physical Properties Testing and Inspection |
| Manufacturer | Hach Ultra Analytics Inc. Dba Pacific Scientific Instruments |
| Status | ACTIVE |
| General Characteristics Item Description | SELECTABLE SIZE RANGES 0.3,0.5,1.0,5,10 MICRON AND LARGERS (SELECTABLE);FLOW RATE 1.0 CFM (0.1 OR 0.01 OPTIONAL);COINCIDENCE ERROR 5% AT 3,000,000 COUNTS;FIELD CALIBRATION CONTINUOUS;FACTORY CALIBRATION MONO-DISPERSED POLYSSTRYENE LATEX SPHERES TRACEABLE TO NIST;SELECTABLE SAMPLE PERIOD 0,1,6,10,60,600 SECONDS OR INFINITE;ALARM LIMITS 0,1,10,100,1000,10,000,100,000;LIGHT SOURCE SOLID STATE LASER DIODE;LASER LIFE 20,000 HOURS;COUNT DISPLAY 999,999;SIZE 12.5 INCHES WIDE BY 15.0 INCHES DEEP BY 6.5 INCHES HIGH;WEIGHT 28 LBS;POWER SOURCE 300 WATTS;VOLTAGE 115 VAC,60 HZ,220 VAC 50 HZ,100 VAC 50/60 HZ;0.3 MICRON SENSITIVITY;FRONT PANEL OPERATION;RS-232C OR RS-485 PARALLEL CENTRONICS VAC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 206L PRIMARY | Hach Ultra Analytics Inc. Dba Pacific Scientific Instruments (USA) |
| Reference | Meaning |
|---|---|
| POINT 3 | 5/9 Secondary reference Hach Ultra Analytics Inc. Dba Pacific Scientific Instruments |
NSN 6635-01-306-4527 is a Counter,airborne Particle, manufactured by Hach Ultra Analytics Inc. Dba Pacific Scientific Instruments, classified under FSC 6635, Physical Properties Testing and Inspection. Status: active.
NSN 6635-01-306-4527 has 1 manufacturer part number on file: 206L (Hach Ultra Analytics Inc. Dba Pacific Scientific Instruments).
Key specifications for 206L: General Characteristics Item Description: SELECTABLE SIZE RANGES 0.3,0.5,1.0,5,10 MICRON AND LARGERS (SELECTABLE);FLOW RATE 1.0 CFM (0.1 OR 0.01 OPTIONAL);COINCIDENCE ERROR 5% AT 3,000,000 COUNTS;FIELD CALIBRATION CONTINUOUS;FACTORY CALIBRATION MONO-DISPERSED POLYSSTRYENE LATEX SPHERES TRACEABLE TO NIST;SELECTABLE SAMPLE PERIOD 0,1,6,10,60,600 SECONDS OR INFINITE;ALARM LIMITS 0,1,10,100,1000,10,000,100,000;LIGHT SOURCE SOLID STATE LASER DIODE;LASER LIFE 20,000 HOURS;COUNT DISPLAY 999,999;SIZE 12.5 INCHES WIDE BY 15.0 INCHES DEEP BY 6.5 INCHES HIGH;WEIGHT 28 LBS;POWER SOURCE 300 WATTS;VOLTAGE 115 VAC,60 HZ,220 VAC 50 HZ,100 VAC 50/60 HZ;0.3 MICRON SENSITIVITY;FRONT PANEL OPERATION;RS-232C OR RS-485 PARALLEL CENTRONICS VAC; Special Features: DESIGNED TO MONITOR PARTICLES AS SMALL AS 0.3 MICRON;DRAWS AIR INTO SENSIR AT RATE OF 1 CUBIC FOOT PER MINUTE;AIR FLOW PASSES THROUGH VIEW VOLUME-LIGHT GENERATED BY LASER DIODE;PARTICLES DEFLECT LIGHT ENERGY TO A SOLID STATE PHOTODIODE WHERE EACH BURST OF LIGHT IS CONVERTED TO A PULSE OF ELECTRICAL ENERGY;DIGITAL COUNTER ACCUMULATES THE PULSES ACCORDING TO SIZE SELECTED;SAMPLE AIR IS THEN FILTED,REMOVING ALL PARTICLES LARGER THAN 0.2 MICRON BEFORE AIR IS EXHAUSTED BACK INTO ROOM. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.