Kinematic Viscometer LKV-A13

Labtron Kinematic Viscometer LKV-A13 requires different bath fluids depending on the target temperature range. For tests up to 100?°C, distilled water or water-glycol mixtures are suitable due to their ease of use and thermal conductivity. For high-temperature applications (above 100?°C and up to 180?°C), high-temperature silicone oils or specialized heat transfer fluids are preferred, thanks to their thermal stability and low vapor pressure. We recommend choosing bath fluids that are chemically compatible with the device's materials and easy to maintain over repeated use cycles.

The Kinematic Viscometer LKV-A13 utilizes Cannon-Fenske reverse-flow capillaries that are specifically designed for transparent, Newtonian fluids. Our reverse-flow capillaries direct the sample upward during measurement, minimizing errors caused by gravity drainage and improving timing precision. This configuration also helps reduce air bubble formation and ensures smoother meniscus movement through the tube. As a result, the device provides more consistent readings, especially when testing light oils or low-viscosity fuels.

Labtron Kinematic Viscometer LKV-A13 is optimized for Newtonian fluids, those that maintain constant viscosity under a fixed shear rate and temperature. It is not suitable for testing non-Newtonian fluids such as pastes, emulsions, or polymer suspensions, which change viscosity with flow conditions. These materials require viscometers like rotational, cone-and-plate, or rheometers that are capable of analyzing shear-dependent behavior. Using the viscometer for such substances may yield incorrect or inconsistent results.

Our Kinematic Viscometer LKV-A13 signals potential maintenance needs when the bath fluid becomes discolored, cloudy, or emits an unusual, odor indications of degradation due to oxidation, overheating, or contamination. We recommend draining and replacing the compromised fluid with a fresh, compatible heat transfer liquid and thoroughly cleaning the bath chamber to eliminate residue buildup. Continued use of degraded fluid may compromise temperature accuracy and potentially damage critical components like the stirrer or heating element. Always follow our guidelines for usage limits and replacement intervals to ensure optimal performance.

Our Kinematic Viscometer LKV-A13 requires regular cleaning of the capillary tubes to ensure accuracy and avoid cross-contamination between tests. Immediately after use, rinse the capillaries with a solvent that dissolves the sample, followed by a quick-drying agent like acetone or hexane. The bath fluid should be filtered or replaced if it appears contaminated, and the bath chamber and stirrer should be wiped clean using mild, non-abrasive lab-grade cleaning solutions. Maintaining a clean system helps extend instrument life and ensures test reliability.