HUMBOLDT

About HUMBOLDT

Humboldt Mfg. Co. is a manufacturer of construction materials testing equipment and laboratory apparatus, established in the United States in the early 20th century. The company's product line covers soil, concrete, asphalt, and aggregate testing, with a catalog that includes compaction and density gauges, cylinder molds, crack monitors, penetrometers, ovens, sieve pans, and related accessories. Humboldt equipment is used in geotechnical investigation, quality control of concrete and soil, and materials research. The brand is known for producing field and laboratory instruments that conform to standards such as ASTM and AASHTO, though specific compliance depends on the individual product. 3G Electric supplies Humboldt products globally, with a current inventory of 87 SKUs. The range includes both field-ready instruments and consumable lab items. For example, the Humboldt compaction and density gauge (SKU 5DPH7) measures soil compaction and density in the field using an LCD display, with a measuring depth of 9 to 12 inches (230 to 310 mm) and battery life of 1000 to 1500 measurements; it references ASTM D6758. Cylinder molds are available in multiple configurations: plastic and steel, with or without lids or base plates, and in various dimensions. The plastic cylinder mold H-3041B (SKU 787YX5) has a 12-inch height and 6-inch diameter, supplied in a 36-pack. Steel molds such as SKU 5DNU9 (12-inch height, 6-inch diameter) and SKU 5DNU5 (6-inch height, 3-inch diameter) include base plates. Smaller plastic molds include SKU 5DPC6 (4-inch height, 2-inch diameter, pack of 84) and SKU 5DPC5 (6-inch height, domed lid, pack of 80). Crack monitors, such as SKU 38YZ65, are clear plastic gauges with black and red millimeter graduations starting at 0 mm, used to track crack movement in concrete structures; a record sheet is included. These items support routine testing workflows in construction materials laboratories and field sites. 3G Electric maintains inventory across these Humboldt product families and can provide quotations for specific part numbers. The product data includes manufacturer part numbers, UNSPSC codes, and relevant standards where applicable, allowing procurement and engineering teams to match items to project specifications. For buyers needing multiple units, pack quantities are listed for consumable items such as cylinder molds. 3G Electric ships globally, and the Humboldt line is part of a broader catalog that includes industrial burners, pumps, and gas controls. The company serves plant engineers, maintenance managers, and procurement specialists who require documented specifications and consistent supply. For Humboldt products, 3G Electric provides access to the manufacturer's part numbering system and product details, facilitating integration into existing testing programs. The inventory is updated regularly, and the most recent additions include compaction gauges, crack monitors, and various cylinder molds. Technical support for Humboldt products is available through 3G Electric's customer service, which can assist with part selection and order processing. All products are supplied as described by the manufacturer, with no modifications or substitutions unless specified. 3G Electric does not manufacture Humboldt products; it distributes them as part of its industrial equipment offering. The company's role is to provide a streamlined purchasing channel for these testing supplies, with global shipping and quotation-based pricing. For specific applications, buyers should refer to the manufacturer's instructions and applicable standards to ensure proper use. The Humboldt brand is recognized in materials testing for its range of durable, standards-referenced equipment, and 3G Electric supports that line with inventory and order fulfillment.

Common Applications

• Geotechnical field investigation — HUMBOLDT compaction and density gauge (SKU 5DPH7) for in-situ soil density measurement per ASTM D6758.
• Concrete quality control laboratory — HUMBOLDT plastic cylinder molds (SKU 787YX5, 12 in x 6 in) for casting compressive strength specimens.
• Structural health monitoring — HUMBOLDT crack monitor (SKU 38YZ65) for tracking crack movement in concrete bridges and buildings.
• Soil testing laboratory — HUMBOLDT steel cylinder molds (SKU 5DNU5, 6 in x 3 in) for forming soil specimens for density analysis.
• Construction materials testing — HUMBOLDT plastic cylinder molds with domed lids (SKU 5DPC5, 6 in height) for mortar or concrete specimen preparation.
• High-volume specimen casting — HUMBOLDT plastic cylinder molds (SKU 5DPC6, 4 in x 2 in, pack of 84) for small-scale concrete or soil tests.