Humboldt Mfg. Co., located in the United States, is a leading manufacturer and supplier of construction materials testing equipment. Our equipment is used extensively throughout the world for testing soil, concrete, cement, asphalt and aggregate in construction projects. These projects include roads; bridges; dams; earthworks, and buildings. Humboldt is known for manufacturing high-quality, competitively-priced equipment designed to comply with ASTM and AASHTO testing standards, especially our geotechnical testing equipment, our nuclear gauge and the nuclear- free, electrical density gauge. Humboldt Mfg. Co. products are available worldwide through our dealer network and directly from our factory. In the United States, our products are sold directly to customers via our website and sales force, as well as a select group of established dealers. Internationally, Humboldt Mfg. Co. sells through an extensive network of experienced and knowledgeable dealers. To purchase product internationally, you can find a list of our dealers on the contact page of this website, or you can request a quote for equipment through our website’s quote cart system. Humboldt has always been concerned with the quality of our products and since 2003, we have maintained a quality management system in accordance with ISO standards. This standard comprises the constant monitoring and continuous improvement of the company’s processes. Today, Humboldt is certified to ISO 9001: 2008 standards. Our current certification can be viewed and downloaded here. As Humboldt goes forward, Our focus is on the continual improvement of our testing equipment and maintaining diligent customer service. This effort has resulted in the development of our high-quality geotechnical equipment complimented by our advanced testing software modules and the electrical density gauge, a nuclear-free, moisture and density gauge alternative.