Introduction
An Ubbelohde viscometer is a capillary viscometer used to measure the viscosity of transparent liquids, and it is widely used for measuring the viscosity of polymer solutions, oils, and other liquids in research, quality control, and the petroleum and polymer industries. The viscometer consists of a U-shaped glass tube with a capillary section, a reservoir, and a measuring bulb, and it is designed with a suspended level so that the measurement is independent of the volume of liquid in the viscometer, which makes it convenient to use; in operation, a fixed volume of the liquid is placed in the viscometer, which is held in a constant-temperature bath, and the time for the liquid to flow through the capillary between two marks is measured, and the kinematic viscosity is calculated by multiplying the flow time by the viscometer constant, and the relative, inherent, and intrinsic viscosity of polymer solutions can be determined from measurements at different concentrations. Ubbelohde viscometers are used for measuring the viscosity of polymer solutions for determining the molecular weight of polymers, for quality control of oils and lubricants, for measuring the viscosity of fuels and other liquids, and for research, and they are available in various capillary sizes to cover different viscosity ranges, with features such as precise temperature control in the bath, and they are used with standardized methods. With their precision and versatility, Ubbelohde viscometers are essential instruments for viscosity measurement.
Semi-T20utomatic Ubbelohde Viscometer LUV-T2010
Semi-Automatic Ubbelohde Viscometer viscosity measurement with a wide range from 0.3 to 100000 mm²/s for optimal performance. Its manual sample loading process ensures flexibility and c...
Automatic Ubbelohde Viscometer LUV-T2020
Automatic Ubbelohde Viscometer features an 8 testing. It includes an oil bath medium for stable temperature control. The system prevents damage by removing the need for disassembly. Our ...
Ubbelohde Viscometer LUV-T2012
Ubbelohde Viscometer measures a wide viscosity range from 0.3 to 50,000 mm²/s, making it suitable for all types of fluids. It offers six measuring positions for greater testing flexibil...
Automatic Ubbelohde viscometer LUV-T2010
Automatic ubbelohde viscometer with high temperature has 180°C heated oil design, measures viscosity of polymers with high temperature and it has 2 units for measurement. This viscomete...
Ubbelohde Viscometer LUV-T2010
Ubbelohde Viscometer has a wide measuring range of 0.3 to 50,000 mm²/s, making it ideal for both low and high viscosity fluids. It features two measuring positions for improved flexibil...
Ubbelohde Viscometer LUV-T2011
Ubbelohde Viscometer has display screen to show the running status of each measurement unit, precisely 6 units at the same time. It has 4 measuring positions & it can obtain intrinsic vi...
Standards
ISO 3219:1993-Plastics-Determination of viscosity using a rotational viscometer with defined shear rate
ASTM D2196-20-Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer
Complies with the above standards, but is not limited to them.
Features
1. Ubbelohde viscometer for measuring kinematic viscosity of transparent liquids.
2. Capillary viscometer with suspended level design for accurate viscosity measurement.
3. Suitable for petroleum, chemical, pharmaceutical, food and research laboratories.
4. Includes viscometer tube, constant temperature bath, timer and operation manual.
5. Supports kinematic viscosity measurement per ASTM D445 and ISO 3104.
FAQ
Q1: What testing scenarios is this viscometer mainly applied to?
A: The Ubbelohde viscometer is used in petroleum refining, chemical analysis, pharmaceutical manufacturing, food testing, polymer research and quality control laboratories to measure the kinematic viscosity of transparent Newtonian liquids including oils, solvents, polymers, pharmaceuticals and food products using a capillary tube method. It supports petroleum product viscosity testing for specification and quality control, polymer solution viscosity for molecular weight determination, pharmaceutical liquid viscosity measurement, food product viscosity assessment, chemical solvent and reagent viscosity testing, and research applications. The Ubbelohde design with suspended level allows measurements independent of sample volume, providing accurate, reproducible results. It is essential for petroleum, chemical, pharmaceutical, food and research laboratories requiring kinematic viscosity measurement for product specification, quality control, molecular weight determination, formulation and research, where the Ubbelohde capillary viscometer provides accurate, reproducible kinematic viscosity measurement of transparent liquids per standardized methods, supporting petroleum product testing, polymer characterization, pharmaceutical quality control and chemical analysis in industrial and research environments requiring reliable viscosity determination.
Q2: What standards does the viscometer comply with?
A: The Ubbelohde viscometer follows ASTM D445 for kinematic viscosity of petroleum products, ISO 3104, ISO 3105 for viscometer calibration, and relevant GB/T standards including GB/T 265. The viscometer constant should be calibrated and traceable to international standards. Temperature control follows the standard requirement (typically 40 degrees C or 100 degrees C for petroleum products).
Q3: What is the warranty period for the whole machine and key components?
A: The Ubbelohde viscometer tube is a precision glass instrument covered by a 12-month warranty against manufacturing defects. The constant temperature bath, timer and accessories are covered per their respective warranties. Damage from improper handling, breakage or unauthorized modification is excluded. Viscometer tubes are considered precision instruments and should be handled with care.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires trained laboratory personnel familiar with viscometry, capillary viscometer use and temperature control. We provide operation manuals, training and application support. Proper viscometer selection, cleaning, temperature equilibration, timing technique and result calculation are important for accurate viscosity measurement.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular calibration required? What is the recommended calibration cycle?
A: Viscometer constant calibration recommended every 12-24 months with certified viscosity reference oils. Viscometer tube condition (cleanliness, scratches) checked before each use. Temperature bath calibration every 6-12 months. Timer accuracy verified periodically. Full system verification for accredited laboratories.
Q7: Are supporting consumables universal?
A: Viscometer tubes, cleaning solutions, reference oils and timers are available from laboratory suppliers, though capillary constant should match the application. Long-term consumable cost is low to moderate depending on usage and tube breakage.
Q8: Can I customize parameters or supporting accessories?
A: Customization includes capillary constant (viscosity range), tube size, constant temperature bath type, timer precision and accessories. Additional viscometer tubes, baths and accessories can be ordered separately. Custom orders extend delivery lead-time.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes the Ubbelohde viscometer and accessories with an operation manual. On-site installation and training are not included for standard orders but can be arranged for laboratory setup. Remote guidance is provided.
Q10: What types of samples are compatible with this equipment?
A: The Ubbelohde viscometer measures kinematic viscosity of transparent, Newtonian liquids within the viscosity range and capillary constant specification. Opaque or non-Newtonian liquids require different viscometer types (e.g., reverse flow for opaque, rotational for non-Newtonian). Corrosive liquids may require special glass or material. Samples should be clean and free of particulates that could block the capillary. Users should select appropriate capillary constant for the expected viscosity, clean the viscometer thoroughly between samples, control temperature precisely (viscosity is highly temperature-dependent), allow sufficient temperature equilibration, use proper timing technique, and report results with temperature and viscometer constant specified. The viscometer should be handled carefully to avoid breakage, and proper cleaning solvent should be used to remove residue. For petroleum products, measurements are typically performed at 40 degrees C or 100 degrees C per the product specification.
Tips: For more details, quotes and customized solutions, please contact us anytime. We’re always ready to serve you professionally.