Gilson Company, Inc. is a U.S.-based manufacturer and supplier of construction materials testing equipment. We design, manufacture, and sell high-quality instruments and tools used in civil engineering, field testing, and laboratory environments for testing aggregates, asphalt, concrete, soils, and related materials.

Gilson was founded in 1939 and has been serving the construction materials testing industry for more than 80 years. We are a third-generation, family-owned business headquartered in Lewis Center, Ohio.

Gilson is both a manufacturer and a supplier, which means we design and build many of the products we sell. We back every sale with dedicated technical support from staff members who average over 20 years of hands-on industry experience. We are committed to offering high-quality products at competitive prices, and we are available to help customers find the right equipment even when it means pointing them in a different direction.

Our facility is located at 7975 North Central Drive, Lewis Center, OH 43035. We ship domestically and internationally from this location.

Our primary focus is construction materials testing, including civil engineering labs and field testing. Our equipment is also used in pharmaceutical, food science, and other industries that require particle size analysis, sample dividing, and related testing.

Gilson offers equipment across the following categories: test sieves and sieve shakers, aggregate testing equipment, asphalt testing equipment (including Marshall Compactors), concrete testing equipment (including compression machines), soil testing equipment, ovens and furnaces, crushers/pulverizers/mills, temperature and humidity equipment, scales and balances, sampling and dividing equipment, and general laboratory equipment.

Both. Gilson manufactures many of its own branded products and also supplies select third-party equipment. Our own Gilson-branded products represent decades of in-house design and innovation, beginning with the original Gilson Testing Screen introduced in 1939.

Yes. Gilson products are designed to meet ASTM, AASHTO, and other applicable test standards. Specific compliance information is listed on individual product pages.

Our Customer Service and Technical Support teams are available to help you select the correct equipment for your testing needs. You can also browse our 350+ page catalog, product pages, and Gilson Insights blog for application guidance. Contact us at 800-444-1508 or email techsupport@gilsonco.com.

Yes. An interactive 2026 catalog is available online at GlobalGilson.com. You can also request a printed catalog through the website.

Yes. Gilson Deals (also called the Clearance List) features discounted and clearance-priced equipment available at GlobalGilson.com/clearance-list.

Orders can be placed directly on GlobalGilson.com, by phone at 800-444-1508, or by emailing customerservice@gilsonco.com. A Quick Order option is also available on the website for customers who know the model numbers they need.

Yes. You can request a quote by emailing quotes@gilsonco.com or calling 800-444-1508.

Gilson accepts MasterCard, Visa, and American Express for all orders. Approved business accounts may qualify for Net 30 terms (domestic orders), subject to prior credit approval.

Gilson sells to both individuals and organizations, including civil engineering firms, government agencies, universities, testing labs, and contractors.

Yes. Gilson accepts international orders. Payment for export orders must be made in U.S. dollars via irrevocable Letter of Credit or wire transfer. Special handling fees apply and are calculated at the time of quote or order. Contact international@gilsonco.com for international inquiries.

Yes. Prices are listed on product pages and a price list is available at GlobalGilson.com/pricelist. Prices are subject to change without notice.

Gilson ships domestically throughout the United States and internationally. All orders ship from Lewis Center, Ohio (FOB shipping point).

Shipping and handling fees are applied to all orders to cover packaging, shipping, and insurance costs. International orders require special handling fees calculated at the time of quote or order.

Unless the customer specifies a preferred carrier, Gilson selects the shipping method. If a customer designates the carrier, risk of loss transfers to the customer upon tender to the carrier.

Shipping dates are approximate and depend on the specific product and order details. Contact customer service for estimated lead times on specific items.

Inspect all packages before accepting delivery. Any visible damage or loss must be noted on the bill of lading at the time of delivery. Gilson must be notified of damage or loss within 5 business days of delivery. After 5 business days without notice, the shipment is considered accepted. Concealed damage (where the box appears intact but the product is missing or damaged) is handled on a case-by-case basis.

Equipment may be returned within 30 days of the delivery date with a Return Goods Authorization (RGA) number. Items must be unused, in new condition, and returned in original packaging including all manuals, cords, software, and accessories. A minimum 15% restocking fee applies. Customers are responsible for return shipping costs. Certain items such as cut-to-size screen cloth and special-order products are non-returnable. See the full Returns Policy for details.

Contact Gilson at 800-444-1508 or 740-548-5314 to request an RGA number before sending any item back. Returns sent without an RGA number or sent COD will not be accepted.

Gilson products are warranted against defects in materials and workmanship for one year from the date of original shipment. The warranty excludes damage from neglect, abuse, normal wear and tear, unauthorized modifications, improper installation, or causes beyond Gilson's control (e.g., lightning, floods, electrical irregularities). Third-party manufacturer warranties are honored and passed through when applicable.

Contact Gilson customer service to obtain an RGA number before returning any product for warranty evaluation. Gilson will repair or replace the product at its discretion if the defect is determined to be covered under warranty. Labor or reinstallation costs are not covered.

Yes. Gilson has a dedicated Technical Support team with deep hands-on experience in construction materials testing. You can reach them by phone at 800-444-1508 or by email at techsupport@gilsonco.com during business hours, Monday through Friday.

Yes. The Gilson Insights blog, video library, and Resource Center on GlobalGilson.com offer application guidance, how-to content, and information on ASTM and AASHTO testing standards for aggregates, asphalt, concrete, and soils.

For information about repair and service options, contact techsupport@gilsonco.com or call 800-444-1508.

For volume pricing or account inquiries, contact customerservice@gilsonco.com or call 800-444-1508.

Yes. Gilson sells to government agencies, academic institutions, testing laboratories, DOTs, and similar organizations.

Yes. Distributor information is available at GlobalGilson.com/distributors.

Phone: 800-444-1508
Fax: 800-255-5314
US Sales: customerservice@gilsonco.com
International Sales: international@gilsonco.com
Quotes: quotes@gilsonco.com
Technical Support: techsupport@gilsonco.com
Address: 7975 North Central Drive, Lewis Center, OH 43035