PSC 6685: Pressure, Temperature, and Humidity Measuring and Controlling Instruments
6685 is the product and service code (PSC) federal agencies use for pressure, temperature, and humidity measuring and controlling instruments, in the instruments and laboratory eqpt group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 21
- Spending, FY2026
- $92 million
- Share to small businesses
- 47%
Open contracts with PSC 6685, due soonest
- NSN: 6685-00-861-0628, VALVE-HOLDER ASSY, WSDC: HELICOPTER, UH-60A, UH-60L, UH-60V 40A
✦ The Defense Logistics Agency (DLA Aviation) plans to buy a valve-holder assembly for UH-60 Black Hawk helicopters, to be delivered about 245 days after award.
Due in 4 daysOct 13, 2026
- BASE,PRESSURE SENSO
✦ NAVSUP Weapon Systems Support (Navy, Mechanicsburg) wants to buy a pressure sensor base made by DRS Training & Control Systems LLC, part number 07030655-1.
Due in 4 daysOct 13, 2026
- THERMOMETER
✦ NAVSUP Weapon Systems Support (Mechanicsburg) is soliciting quotes for a thermometer, part number 026-23498-001, made by Johnson Controls Navy Systems, LLC. The text lists…
Due in 6 daysOct 15, 2026
- ALTIMETER,PRESSURIZ
✦ NAVSUP Weapon Systems Support (Mechanicsburg) wants a contractor to repair pressurization altimeters (CAGE 0WEC9, reference 671CPX-10-051).
Due in 13 daysOct 22, 2026
- PIP-II SSRS AND LB650 VACUUM GAUGE AND READOUT
✦ Fermi Forward Discovery Group, which runs Fermilab for the Department of Energy, wants to buy cold cathode vacuum gauges, readout controllers, measurement boards and cables for…
Due in 14 daysOct 23, 2026
- TEST KIT, HP
✦ The Navy's supply command at Mechanicsburg (NAVSUP WSS) wants quotes for a "Test Kit, HP" made by Standard Calibrations Inc, part number SCI-PTK-03A. It is a fixed-price supply…
Due in 27 daysNov 5, 2026
Where 6685 sits in the PSC Manual
- Category: Product
- Group 66: Instruments and Laboratory Eqpt
- Code 6685: Pressure, Temperature, and Humidity Measuring and Controlling Instruments
NAICS codes used with PSC 6685
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with 6685 most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 334519 | Other Measuring and Controlling Device Manufacturing | $101.1 million |
| 334513 | Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables | $91.4 million |
| 336413 | Other Aircraft Parts and Auxiliary Equipment Manufacturing | $48.2 million |
| 336411 | Aircraft Manufacturing | $48.2 million |
| 334512 | Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use | $43.9 million |
| 336412 | Aircraft Engine and Engine Parts Manufacturing | $24 million |
| 334511 | Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | On 1 open |
Who buys under PSC 6685
Agencies with the most contract dollars under 6685 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Defense Logistics Agency | $257 million |
| Department of the Air Force | $64.3 million |
| Department of the Navy | $40.7 million |
| National Oceanic and Atmospheric Administration | $12.4 million |
| Department of the Army | $5.4 million |
| Office of Assistant Secretary for Preparedness and Response | $5 million |
| Department of Veterans Affairs | $3.8 million |
| U.S. Coast Guard | $2.1 million |
On open notices right now, the most 6685 work comes from Dept of Defense and Department of Energy.
Federal spending under PSC 6685 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $167.2 million |
| FY2025 | $143.6 million |
| FY2026 | $92 million |
| FY2027 (so far) | $0 |
Who wins PSC 6685 contracts
| Company | Obligated, last 3 years |
|---|---|
| Northrop Grumman Systems Corp | $43.9 million |
| Rolls-Royce Corporation | $22.2 million |
| Rosemount Aerospace Inc | $20.3 million |
| Honeywell International Inc. | $12.1 million |
| MMC Metrology Lab, Inc. | $11.9 million |
| Fluke Electronics Corp | $10.3 million |
| Sea-Bird Electronics, Inc | $9.9 million |
| Kulite Semiconductor Products Inc | $7.5 million |
| Transaero, Inc. | $7.4 million |
| King Nutronics Corporation | $6.2 million |
Related PSC codes
- 6605 Navigational Instruments
- 6610 Flight Instruments
- 6615 Automatic Pilot Mechanisms and Airborne Gyro Components
- 6620 Engine Instruments
- 6625 Electrical and Electronic Properties Measuring and Testing Instruments
- 6630 Chemical Analysis Instruments
- 6632 Analysis Instruments, Medical Laboratory Use
- 6635 Physical Properties Testing and Inspection
- 6636 Environmental Chambers and Related Equipment
- 6640 Laboratory Equipment and Supplies
Frequently asked questions
What is PSC 6685?
6685 is the product code in the federal Product and Service Code (PSC) Manual for pressure, temperature, and humidity measuring and controlling instruments, under 66 (Instruments and Laboratory Eqpt). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
Which NAICS code goes with PSC 6685?
Most federal contract dollars under PSC 6685 go with NAICS 334519 (Other Measuring and Controlling Device Manufacturing), according to USAspending.gov. The contracting officer picks the NAICS code for each solicitation, so check the notice.
How do I find contracts that use PSC 6685?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 21 open notices use PSC 6685 right now. FedReady can match new ones to your business and email you, free.