Automated Digital Penetrometer

The Koehler K95500 Digital Penetrometer sets the industry standard for determining the consistency and shear stability of solid and semi-solid materials. From lubricating greases and petroleum waxes to bitumen and food products, this instrument delivers highly reproducible, accurate results in full compliance with ASTM, IP, ISO, and DIN standards. Engineered for the modern laboratory that demands both precision and efficiency, it combines microprocessor-controlled automation with user-centric design to eliminate common variables and sources of operator error.​

Precision and Reproducibility

At the core of the Koehler Digital Penetrometer is a sophisticated microprocessor that automates the entire penetration test sequence. The instrument defaults to the standard 5.0-second interval required by many ASTM methods, but operators have the flexibility to program test intervals from 0.1 to 9999.9 seconds. This programmability extends to a pre-test curing or temperature stabilization period, ensuring samples are perfectly conditioned before the test begins.​

To guarantee the highest level of reproducibility, the penetrometer features four programmable presets for motorised placement of the penetrator tip. This critical function allows any operator to lower the cone or needle to the exact sample surface with one-touch simplicity, eliminating placement variability, a primary source of error in manual methods. For electrically conductive samples, a built-in circuit senses the surface for fully automatic placement. Fine adjustment controls, aided by a magnifier and illuminator, remain available for specialised applications, providing total control when needed. After the test, the head automatically raises to simplify cleaning and sample changes, further boosting workflow efficiency.​

Streamlined Workflow

The Koehler automatic penetrometer is designed to make advanced testing straightforward and efficient. All test parameters and results are shown on a large, clear LCD, with dedicated keypad controls for each function to simplify operation. Penetration results are displayed in your choice of 1/10mm or 1/100mm increments across the full 0-620 range.​

For quality control environments, an allowable penetration range can be programmed into the instrument. If a result falls outside this range, the unit provides an immediate audible and visual alert, preventing out-of-spec product from moving forward. All test data, including penetration depth and timing, can be exported via the integrated RS232 port to a computer or printer for robust data logging and compliance with ISO 9001 and other quality systems. Selected parameters are retained in memory, allowing for rapid execution of repeat tests without reprogramming.​

Engineered for Versatility and Durability

Recognizing the diverse needs of modern labs, the Koehler Digital Penetrometer is built for ultimate flexibility. Its heavy, detachable machined base provides a stable platform for a wide range of sample containers, including standard grease worker cups and constant temperature cylinders. The base can be easily removed, allowing the head assembly to be reversed or mounted directly onto a constant temperature bath for specialised testing requirements.​

This versatility extends to its power source. The instrument runs on standard AC power, during which its internal rechargeable battery is automatically charged. In the event of a power outage or for applications in the field, the battery provides a reliable backup, ensuring that critical tests are never interrupted. This dual-power capability makes it a premier piece of penetration testing equipment for both laboratory and remote site analysis.​