Gilson Company, Inc.

Model HM-320 - Universal Penetrometers

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The Universal Penetrometer tests a wide variety of materials by penetration of weighted needles or cones. Main applications are for bituminous materials, but waxes, greases, foods, and pharmaceuticals are among other products tested. Penetration is read from a 5in (127mm) diameter indicator dial of 400 divisions, each representing 0.1mm of penetration. Gilson offers heavy-duty units for manual and automatic use and a lighter, portable model for field work or users with a limited work load or budget. All meet ASTM and AASHTO standards when fitted with proper needle or cone.

HM-320 Manual Penetrometer is ruggedly constructed for accurate, sensitive measurements. The aluminum base has a machined, grooved table with leveling screws and rubber inserts to protect tips of needles and cones. Two stainless steel rods act as support guides for a cast aluminum head with coarse/fine adjustments and a calibrated friction-free plunger mechanism. Indicator dial has instant zero reset. Any needle or cone with standard 1/8in (3mm) diameter stem may be mounted to the 47.5g plunger assembly. A standard 2.5g ASTM D 5 Needle (HMA-180) and two additional loading Weights (50g and 100g) are included. Order needles or cones for other tests separately as needed. Overall Dimensions: 10.5x13x22in (267x330x559), WxDxH. Est. Ship Wt.: 30lb (14kg).

HM-322 Automatic Penetrometer is the same as the HM-320, but has a button release mechanism with digital timer to automatically stop the plunger when the preset time from 0.1—9.9 seconds expires. Est. Ship Wt.: 32lb (15kg).

HM-325 Light Duty Penetrometer has features like the HM-320 manual model but is smaller and easy to disassemble. One Model HMA-180 Needle and an additional Loading Weight (50g) are provided. Overall Dimensions: 7x7x16in (178x178x406mm), WxDxH. Est. Ship Wt.: 8lb (4kg).

HMA-180 Penetration Needle for bituminous materials is smooth, hardened, tempered stainless steel with brass ferrule and weighs 2.5g to give 50g total when mounted with plunger assembly. Stainless steel wax penetration needle HMA-181 is also 2.5g but has truncated cone-shaped tip with approximately 4mm maximum diameter tapered to 0.15mm diameter end. Several types of grease cones detailed in ASTM D 217 have polished 90° cone with 30° removable hardened steel tip. Other types of Needles and Cones are available. Transfer Dish HMA-188 is clear plastic, 3.75in diameter x 3.25in deep (95x82mm), suitable for holding 3oz or 6oz sample boxes for transferring samples from bath to penetration testing. Flat bottom of dish has metal centering lugs and a magnet cemented to the bottom to secure sample boxes.

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