Fast analysis, high sample throughput
Automate kinematic viscosity testing while meeting or exceeding ASTM D 445 requirements. Herzog's HVU 481 offers truly stand-alone operation with exceptional bath temperature range and stability. It simultaneously tests up to two samples using standard Ubbelohde-style capillary tubes. Near-infrared (NIR) or NTC thermal meniscus detection systems precisely measure flow properties of even the most challenging sample types, while an automatic tube cleaning system incorporates Kalrez(tm) seals to withstand use of aggressive solvents such as toluene or acetone. Complete cycle time, including automated cleaning, is 30 to 40 minutes. Results can be exported immediately or on-demand to a printer or LIMS. Add the powerful Herzog Laboratory Information System (HLIS®) Windows-based software for enhanced operation and data management.
Ultimate sample integrity, high volume testing
As the analyzers of choice when many viscosity results are required in a short period of time, the HVU 481 ensures utmost sample integrity, keeping the specimen in the testing tube until two successive determinations have been made which fall within user-programmed repeatability limits. For extremely high volume testing applications, the HVU 481 is specially outfitted for use with Herzog's HVU 491 Automatic Sample Changer as well as aggressive solvents.
Herzog Laboratory Information System (HLIS)
Test results display on the analyzer's local digital readout and can be output automatically or on demand to an optional printer or computer system. Viscosity values may also be determined at different temperatures for automatic calculation and reporting of the viscosity index (VI) when using Herzog Laboratory Information System (HLIS) -- custom networking and management software that centralizes data storage and control for a variety of tests and results. HLIS also calculates gravitation effect and the Hagenbach correction as well as Saybolt universal seconds from mm2/second.
When HLIS is used, the status of all instruments on the network can be viewed at the central PC during any stage of operation. Actual measurement values -- including bath temperature, valve condition, NIR sensors, NTC sensors, and timers -- are observable at a glance. System calibration is quick and simple as well, requiring just a few keystrokes instead of time-consuming electro-mechanical adjustments.