Asphalt Penetration Testing
Their simple and easy-to-use design, provide years of dependable service in labs around the world.
Humboldt penetrometers come in 3 designs:
The H-1200 - Universal Penetrometer
This unit provides a basic precision penetrometer function with its 5-inch diameter, dial indicator, which is graduated in 400 divisions of 0.1mm, corresponding to a 40mm penetration reading. It provides a zero preset for eliminating reading errors. A large variety of penetration needles are available to accommodate any type of penetration testing.
The H-1240 - Electric Penetrometer
This unit builds on the basic design by adding an automatic, digital timer. The timer’s release mechanism is switchable between seconds, minutes and hours and accommodates setting to 1/10th of a second intervals. The penetrometer’s plunger is released with a simple button push and automatically stops at the preset time duration.
The 1240DA - Digital Penetrometer
This unit incorporates a digital gauge for the penetrometer, as well as an auto, digital timer. The use of a digital timer and gauge provides accurate timing of tests with an auto stop feature, as well as precise, at-a-glance readings during and at the end of the a test.
All three of these Humboldt Penetrometers can accommodate any needle or cone plunger that has a 1-1/8th in. (3mm) diameter stem. All three feature a 47.5g plunger assembly, two additional loading weights (50g and 100g) and a standard 2.5g ASTM D 5 needle.
Humboldt also has a Portable Penetrometer, which is lighter and smaller than the other penetrometers.