Guildline Instruments LTD
Smiths Falls, ON
- UEI
- WBDAHNKBYP47
- CAGE
- 35939
- Primary NAICS
- 334513 Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Corporate Entity (Tax Exempt)
- NAICS codes registered in SAM.gov
-
- 334513 Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables Primary
- 334515 Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
- 334516 Analytical Laboratory Instrument Manufacturing
- 811210 Electronic and Precision Equipment Repair and Maintenance
- SAM.gov registration date
- Physical address
- 21 Gilroy St, Smiths Falls, ON K7A 5B7, Canada
- Website
- guildline.com
- Founded
- 1957
- Employees
- 11-50
- Estimated annual revenue
- $1M-$10M
- Industry
-
- Industrials
- Capital Goods
- Industrial Conglomerates
- Industrials & Manufacturing
- SIC code
- 38 Instruments & Related Products
- Profiles
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Repair/recalibration for 6622A-XRU DCC resistance bridge. | Air Education and Training Command | $7,711 | |
| Resistance and shunt calibration system the "labor standards" must be "not applicable" when the "principal place of… | Naval Sea Systems Command | $440,448 | |
| 130 bottles/13 cartons iapso seawater standard | National Oceanic and Atmospheric Administration | $9,516 | |
| Calibration of teraohmmeter | Naval Sea Systems Command | $3,652 | |
| Purchase of iapso standard seawater. | National Oceanic and Atmospheric Administration | $12,179 |
About Guildline Instruments LTD
Guildline Instruments LTD, a for-profit manufacturer based in Smiths Falls, Ontario, Canada, supplies precision metrology and oceanographic instruments, calibration systems, and repair services to federal agencies as a prime contractor exclusively — 93 awards, all prime, with no subcontract footprint. The vendor competes under full-and-open procurement; no set-asides are used across the award portfolio.
Guildline's federal footprint centers on ultra-precise electrical and resistance measurement instruments, calibration standards, and oceanographic reference materials. Representative recent prime work includes a $880,896 firm fixed-price purchase order from Naval Sea Systems Command (January 2024) for a Resistance and Shunt Calibration System to support the Navy Primary Standards Laboratory; a $149,695 purchase order from the Air Force Life Cycle Management Center at Robins Air Force Base (May 2022) for a bridge resistor; a $9,516 purchase order from NOAA (August 2023) for 130 bottles and 13 cartons of IAPSO standard seawater for oceanographic instrument calibration; and a $7,495 repair and recalibration purchase order from Air Education and Training Command (February 2026) for a 6622A-XRU DCC resistance bridge at Luke Air Force Base.
Customer concentration is distributed but skewed toward defense metrology and oceanography buyers. The top five funding agencies account for 67% of award count: NOAA leads by volume (29 awards, $308 thousand combined potential value), followed by Naval Air Warfare Center (11 awards, $171 thousand), Army Materiel Command's Aviation and Missile Life Cycle Management Command (9 awards, $152 thousand), Air Force Materiel Command (7 awards, $3.6 million), and Naval Sea Systems Command (6 awards, $904 thousand). The two rankings diverge sharply on dollars: Air Force Materiel Command's seven awards anchor 64% of the $5.6 million total combined potential value, while NOAA's 29 awards represent only 5%. Activity has been episodic — two awards in 2021 and 2022, two in 2023, one in 2024, one in 2026 — with a combined $1.8 million obligated across the portfolio (33% of potential value). The vendor's work spans NAICS codes centered on precision instrument manufacturing (23 awards under instruments for industrial process variables, 19 under electrical signal measurement instruments) and repair services (22 awards under electronic equipment maintenance and repair), reflecting a core capability in both OEM manufacturing and specialist recalibration and repair.
Guildline has no parent vehicle positions, maintains no subcontractor relationships across the federal portfolio, and operates as an independent prime vendor to DoD metrology programs, Navy systems laboratories, Air Force sustainment commands, and NOAA's oceanographic research enterprise.
Quick answers
What is Guildline Instruments LTD's UEI?
Guildline Instruments LTD's Unique Entity ID (UEI) in SAM.gov is WBDAHNKBYP47.
What is Guildline Instruments LTD's CAGE code?
Guildline Instruments LTD's CAGE code is 35939.
What is Guildline Instruments LTD's primary NAICS code?
Guildline Instruments LTD's primary NAICS code is 334513 (Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables).
Where is Guildline Instruments LTD located?
Guildline Instruments LTD's physical address in SAM.gov is 21 Gilroy St, Smiths Falls, ON K7A 5B7, Canada.
Is Guildline Instruments LTD registered in SAM.gov?
Yes. Guildline Instruments LTD's SAM.gov registration is active through September 10, 2027.
What is Guildline Instruments LTD's most recent federal award?
Guildline Instruments LTD's most recent federal contract award is Repair/recalibration for 6622A-XRU DCC resistance bridge (FA488726P0014), from Air Education and Training Command, on February 24, 2026.
On GovTribe
See Guildline Instruments LTD's full federal record
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- Funding analysis by agency, NAICS and set-aside
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