PSC 6630

Overview

The Product Service Code (PSC) is a governmentwide taxonomy used to classify the specific products and services the U.S. federal government buys, enabling consistent reporting and analysis across systems such as FPDS and SAM. PSC data and definitions are maintained in the official PSC Manual issued on Acquisition.gov and governed by GSA. ¹

PSC 6630 identifies Chemical Analysis Instruments. Per the PSC Manual, this class includes acidity (pH) meters, gas analyzers, alkalinity measuring instruments, and colorimeters. It excludes gas-detecting instruments, manual gas alarms, and in vitro diagnostic substances and reagents, which are covered under other PSCs. ¹

See also on G2X:

• G2X — PSC 6630 overview
• G2X — PSC 6632 (Analysis Instruments, Medical Laboratory Use)
• G2X — NAICS 334516

What this PSC covers

• Acidity (pH) meters used for chemical analysis. ¹
• Gas analyzers for analyzing chemical composition or concentration (non-safety detection). ¹
• Alkalinity measuring instruments. ¹
• Colorimeters and related color analysis instruments. ¹
• Non-medical chemical analysis instruments; clinical/medical laboratory analyzers are classified under PSC 6632. ¹
• Instruments in this class are distinct from hazard-detecting instruments, which fall under PSC 6665. ¹

Related NAICS and PSC codes

Type	Code	Descriptor
PSC	6632	Analysis Instruments, Medical Laboratory Use
PSC	6635	Physical Properties Testing and Inspection
PSC	6640	Laboratory Equipment and Supplies
NAICS	334516	Analytical Laboratory Instrument Manufacturing

Key exclusions and boundaries

• Hazard-detecting instruments (e.g., radiac or gas-detecting equipment) are classified under PSC 6665; manual gas alarms are under PSC 6350. ¹
• In vitro diagnostic substances, reagents, kits, and sets are not in PSC 6630; see PSC 6550. ¹
• General laboratory equipment and supplies (e.g., glassware, furnaces, furniture) are classified under PSC 6640. ¹

Acquisition notes

• Service Contract Labor Standards (SCLS) exemption: When the primary purpose is maintenance, calibration, or repair of certain equipment, the FAR provides an exemption that generally covers scientific equipment classes including PSC 6630, subject to specific conditions (e.g., commercial availability and use). ²
• DoD coordinated acquisition assignment: Under DFARS PGI coordinated acquisition, PSC 6630 is assigned to DSCP (Defense Supply Center Philadelphia) for integrated materiel management. ³
• Group 66 note: Computers and components designed specifically for use with instruments and laboratory equipment are included in Group 66 classes when integral to the instrument system. ¹

Frequently asked questions

• How is PSC 6630 defined officially?

  • The PSC Manual defines PSC 6630 as Chemical Analysis Instruments and notes it includes acidity (pH) meters, gas analyzers, alkalinity measuring instruments, and colorimeters, with listed exclusions. ¹

• How does PSC 6630 differ from PSC 6632?

  • PSC 6630 covers non-medical chemical analysis instruments. PSC 6632 is limited to analyzers used in medical/clinical settings for diagnostic purposes and explicitly excludes many non-medical analysis devices. ¹

• Are maintenance and calibration services for 6630 instruments subject to SCLS?

  • FAR 22.1003-4 provides an exemption for maintenance, calibration, or repair of certain equipment—explicitly citing Group 66 instruments—when conditions such as commercial use and availability are met. Contracting officers apply the associated provisions/clauses accordingly. ²

• Which NAICS codes commonly align with PSC 6630 buys?

  • Manufacturing of these instruments is primarily captured by NAICS 334516. Other NAICS selections (e.g., 333314 or 334513) may apply based on the specific product, but this alignment is not prescribed by official sources. Not specified by official sources ⁴

• Who manages DoD supply support for PSC 6630 items?

  • DFARS PGI coordinated acquisition lists PSC 6630 under DSCP for integrated materiel management across DoD. ³

Useful resources

• PSC Manual (April 2025 edition) — official definitions for Group 66 and PSC 6630. ¹
• FAR 22.1003-4 — SCLS exemptions for maintenance, calibration, and repair. ²
• DFARS PGI 208.70 — Coordinated acquisition assignments (shows DSCP for PSC 6630). ³
• NAICS 334516 — Analytical Laboratory Instrument Manufacturing (official Census definition). ⁴

References

1. Product and Service Code (PSC) Manual. Acquisition.gov. https://www.acquisition.gov/psc-manual
2. FAR 22.1003-4, Administrative limitations, variations, tolerances, and exemptions. Acquisition.gov. https://www.acquisition.gov/far/22.1003-4
3. DFARS PGI 208.70, Coordinated acquisition. Acquisition.gov. https://www.acquisition.gov/dfars/pgi/PGI-208.70
4. NAICS 334516, Analytical Laboratory Instrument Manufacturing. Census Bureau. https://www.census.gov/naics/?input=334516&year=2022&details=334516