PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

8525Counter,particle

Tsi Incorporated · NSN 6635-01-508-8967 · FSC 6635 · No Item Name Available
Verified by PartsTable
NSN 6635-01-508-8967 — this item is cataloged by the U.S. Government under National Stock Number 6635-01-508-8967. Primary manufacturer part number: 8525.
Features
  • Counter,particle — FSC 6635
  • 3 verified cross-references
  • Primary manufacturer: Tsi Incorporated
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Counter,particle, cataloged under National Stock Number 6635-01-508-8967, is classified within Federal Supply Class 6635 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Tsi Incorporated. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6635-01-508-8967
Primary Part Number8525
Item NameCounter,particle
FSC / FSG6635 / 66 — No Item Name Available
ManufacturerTsi Incorporated
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5935-00-258-6045276-1213P1 INTERCHANGEABLE
Connector,plug,electrical
Raytheon Company Dba Raytheon Co
1075-00-383-82703134726B INTERCHANGEABLE
Plate,retainer
Naval Ship Systems Command
6625-00-471-04258525S1991 INTERCHANGEABLE
Indicator,digital Display
North Atlantic Industries, Inc. Dba North Atlantic Industries
5330-00-810-998363X1756 INTERCHANGEABLE
Seal,plain Encased
Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
5961-00-819-249103-0960 INTERCHANGEABLE
Rectifier,semiconductor Device
Dean Technology Inc. Dba Cke
3455-00-953-14592518-C INTERCHANGEABLE
File,rotary
Jarvis Cutting Tools Inc
5365-01-116-40299232-A-171-0 INTERCHANGEABLE
Spacer,sleeve
Carey Manufacturing Co, Inc Dba Amatom Electronic Hardware Div Amatom Electronic Hardware
5975-01-183-87498525 INTERCHANGEABLE
Box Connector,electrical
Abb Installation Products Inc
5340-01-212-4766 INTERCHANGEABLE
Cover,access
6515-01-281-1241 INTERCHANGEABLE
Stapler,surgical
Cross-Reference Index
Part NumberManufacturer
03-0960 Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia (USA)
6635NCM030766 Defense Medical Standardization Board (USA)
8525 PRIMARY Tsi Incorporated (USA)
Related Parts
5935-00-258-6045INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
276-1213P1
1075-00-383-8270INTERCHANGEABLE
PLATE,RETAINER
3134726B
6625-00-471-0425INTERCHANGEABLE
INDICATOR,DIGITAL DISPLAY
8525S1991
5330-00-810-9983INTERCHANGEABLE
SEAL,PLAIN ENCASED
63X1756
5961-00-819-2491INTERCHANGEABLE
RECTIFIER,SEMICONDUCTOR DEVICE
03-0960
3455-00-953-1459INTERCHANGEABLE
FILE,ROTARY
2518-C
5365-01-116-4029INTERCHANGEABLE
SPACER,SLEEVE
9232-A-171-0
5975-01-183-8749INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
8525
5340-01-212-4766INTERCHANGEABLE
COVER,ACCESS
6515-01-281-1241INTERCHANGEABLE
STAPLER,SURGICAL

Frequently Asked Questions

What is NSN 6635-01-508-8967?

NSN 6635-01-508-8967 is a Counter,particle, manufactured by Tsi Incorporated, classified under FSC 6635 (No Item Name Available). Status: active.

What are the part numbers for NSN 6635-01-508-8967?

NSN 6635-01-508-8967 has 3 cross-referenced part numbers: 03-0960 (Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia), 6635NCM030766 (Defense Medical Standardization Board), 8525 (Tsi Incorporated).

What NSN replaces 6635-01-508-8967?

There are 10 known substitutes for 6635-01-508-8967: 5935-00-258-6045, 1075-00-383-8270, 6625-00-471-0425 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 8525?

Key specifications for 8525: Special Features: FOR INDOOR AIR QUALITY SOLUTIONS; DETECTS AND COUNTS ULTRA FINE PARTICLES; IDENTIFIES THE MIGRATION OF TOXIC EXHAUST GASES, MALFUNCTIONING OFFICE EQUIPMENT, PINHLOE GASKET LEAKS IN A BOILER AND A WIDE VARIETY OF OTHER PROBLEMS; FAST AND RELIABLE; SOFTWARE IS INCLUDED; ALSO INCLUDES: CARRYING CASE, 6 AA BATTERIES, TELESCOPING SAMPLE PROBE, SAMPLE TUBE, SHOULDER STRAP, INLET SCREEN, SPARE WICKS, BATTERY HOLDER, ALCOHOL FILL CAPSULE W/STORAGE CAP AND CARTRIDGE, 30ML BOTTLES REAGENT GRADE ISOPROPYL ALCOHOL (16), AND ZERO FILTERS (2); Overall Length: 10.750 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: PARTICLE COUNTER ULTRAFINE P-TRAK; Overall Height: 5.500 INCHES NOMINAL IN. 5 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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