This section provides an overview for densimeters as well as their applications and principles. Also, please take a look at the list of 28 densimeter manufacturers and their company rankings. Here are the top-ranked densimeter companies as of December, 2023: 1.NextGen Material Testing, Inc., 2.A.KRÜSS, 3.Berthold Technologies.
Okayama University Graduate School, Ph.D. (Agriculture). After working as a specially appointed Assistant Professor at Tokyo Medical and Dental University, a fluid researcher at the Okayama Prefectural Institute of Biological Sciences, and a special researcher (JSPS PD) at the Japan Society for the Promotion of Japan Science, he became independent as a freelancer.
Specializes in natural product chemistry, protein engineering, fermentation engineering, and instrumental analysis of chemicals (especially mass spectrometry chemistry).
Specific gravity is the ratio of the mass of a specific substance compared to a standard substance of the same volume.
A specific gravity meter is a device to measure this specific gravity. The term specific gravity is used for solids, liquids, and gases, but this article describes a device for measuring the specific gravity of liquids.
First of all, to summarize the buoyancy force acting on an object, if the specific gravity of water is 1, the object will sink if the specific gravity is greater than 1, and float if the specific gravity is less. The most common type of hydrometer that uses this principle is the hydrometer.
This is a scale that floats on a liquid, reads its scale, and measures specific gravity based on its value.
Recently, however, load cell type, vibration type, differential pressure type, radiation type, etc. are also available, and products with digital displays that make measurement easier than conventional ones have been developed.
Specific gravity meters are used in a wide variety of applications in a wide range of fields such as the pharmaceutical field, food processing field, industrial field, scientific research field, etc.
Specifically, they are used for
The basic structure of a hydrometer is shown in Figure 1. The body maintains buoyancy, and the scale is placed in the cage.
The bottom of the body contains a weight for buoyancy adjustment. When the body is placed in the liquid to be measured, the buoyancy of the scale is equal to the weight of the volume of the liquid in which the scale is submerged.
As a result, the scale sinks into the liquid to the extent that its own weight is balanced by the buoyancy force. The scale is graduated, and when the buoyancy of the scale reaches equilibrium, the reading on the scale coincides with the surface of the water.
Most hydrometers are made of glass, but plastic hydrometers are also available.
In addition to hydrometers, there are other types of specific gravity meters, such as load cell, vibration, differential pressure, and radiation types, which are mainly used in the industrial field.
A load cell is a machine that converts the magnitude of force into an electrical signal, accurately measures the weight of a weight submerged in a liquid, and calculates the specific gravity of the test liquid from the amount of change in the load.
This type of specific gravity meter has the advantage of higher measurement accuracy than conventional hydrometer-type specific gravity meters, and also has the advantage that the analyst's technical differences are less likely to affect the analysis results.
In the case of the vibration type, test liquid is injected into the U-tube, and the U-tube is vibrated from the outside. At this time, the U-tube vibrates at a frequency specific to the mass of the entire U-tube, including the liquid content. Therefore, the mass of the liquid inside the U-tube can be calculated from this frequency, and the density of the sample can be calculated from this value. This type of specific gravity meter is widely used for quality control, especially in the food industry, because it is intuitive to operate and measurement can be completed in a short time.
The differential pressure type uses the principle that the difference in pressure between two points on a measuring row is proportional to the specific gravity of the liquid. The radiation type uses the property that the transmittance of gamma rays emitted from radioisotopes varies with the density of the material.
*Including some distributors, etc.
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Microtrac MRB, a manufacturer of particle size analysis equipment, was established in 1979 and is headquartered in Massachusetts, United States. The company provides a range of products, including laser diffraction particle size analyzers, image analysis particle size analyzers, and Coulter principle particle size analyzers. Its products are used by multiple industries, including the pharmaceutical, food and beverage, and plastics industries. Microtrac MRB also provides particle size analysis solutions, with the company devoted to providing its customers with the finest products and services while offering a wide range of support options to help customers use its products to the maximum.
Qualitest International Inc., founded in 1999, is a supplier of testing equipment such as hardness testers, material testing equipment, universal testing machines, and instruments for testing rubber, metals, paper, plastic, paint, and packaging materials used in the gold and jewelry, mining, oil and gas, surveying, and ultrasonic industries. The Lauderdale, Florida-based business offers technical support, calibration, and repair either directly or through the global QualiService authorized network. The company has an online store with international shipping.
Anton Paar, founded in 1933 and headquartered in Graz, Austria, is a manufacturer and supplier of analytical instruments Their product range includes density meters for measuring liquid and solid density, concentration meters for analyzing solution concentration, viscosity meters for assessing liquid viscosity, particle size analyzers for measuring particle size in liquids or solids, and chromatography systems for substance separation and identification in mixtures. Anton Paar's products cater to a wide range of industries, including food and beverage, pharmaceutical, and chemical, providing analytical solutions for diverse applications.
BETA UTENSILI S.P.A., established in 1932, is an Italian manufacturer and supplier of workshop tools and industrial equipment, headquartered in Sovico, Monza Brianza. The company's product range includes over 16,000 tools for professional mechanics, catering to car repairs, industrial maintenance, and more. Among their offerings are the modular workshop equipment lines of Racing System (RS) C55 and Beta C45PRO, which include workbenches, modules, and more. They also provide various tools such as measuring and marking tools, cutting and general maintenance tools, plumbing tools, and power tools. These tools and equipment find applications in diverse industries, including automotive, aerospace, and mechanical engineering.
BIOBASE GROUP is a Chinese manufacturer of medical and laboratory equipment founded in 1999 and headquartered in Jinan, Shandong. The company offers over 200 different products including laboratory and medical cryogenic equipment, clinical analytical instruments, air protection devices, and specialized storage products. It also produces various medical consumables such as gloves, masks, and syringes. Biobase Group has branches in the US, India, Dubai, Singapore, and Kazakhstan. It offers global distribution and additional customization services to its clients in the biotechnology, environmental, cosmetic, and educational sectors.
Sommer Messtechnik, with roots going back to 1987, Sommer GmbH & Co KG became an independent company in 1997, and was renamed as Sommer GmbH, is a manufacturer specializing in the development and sale of sensors and environmental monitoring equipment in Austria. The company has been a sought-after partner in hydrography, meteorology, industry, and water, and its portfolio includes the RQ-30/RQ-30a, radar profiler RP-30, USH-9 snow depth sensors and wind sensors. These products are designed for data recording, transmission, and analysis of the captured data. Started at home market Austria, Germany and Switzerland, and has become a global supplier.
Mettler Toledo was incorporated in 1945 in Toledo, Ohio, and is today headquartered in Greifensee, Switzerland. Mettler Toledo is a manufacturer of various analytical instruments for use in laboratories, industrial and manufacturing, and food retailing applications to customers globally. Mettler Toledo offers many products across product lines for uses such as product inspection, process analytics, jewelry scales, moisture analyzers, and software for laboratory weighing. Mettler Toledo also offers numerous accessories such as density kits, hands-free accessories, weighing tables, and weight accessories.
Toyo Seiki Seisaku-Sho, Ltd., established in 1934 with headquarters in Tokyo, Japan, is a manufacturer of product and material measuring apparatus. The company's product portfolio comprises testing machines for a range of materials and test applications. Its products include abrasion testers, flammability testers, density testers, and permeability testers. These testing products have numerous applications, including by manufacturers to test the durability and safety of new products, by painters to test coating thickness, and in the production of fire-safe products.
A.KRÜSS, since 1796, has been a manufacturer of high-precision analysis and laboratory instruments. The instruments are refractometers, polarimeters, density meters, flame photometers, and melting point meters. More products are circulating thermostats, gas analyzers, microscopes, spectroscopes, and spectral measuring instruments. The company in Germany is ISO 9001:2015 and 14001:2015 certified and provides services such as application consulting, product demonstration, calibration & adjustments, maintenance & repair, and installation with warranty extensions. The company has a pages campus with facts about density measurement, radioactivity, measuring methods, and optical devices.
Brabender GmbH & Co. KG, established in 1923 and headquartered in Germany, is a manufacturer that specializes in advanced laboratory and processing equipment for applications in the food, chemical, and pharmaceutical industries. Its product range includes precision instruments like laboratory extruders, feeders, and rheometers. These instruments are used in polymer research, formulation development, and quality control in food production, chemical synthesis, and pharmaceutical drug formulation. The company's laboratory extruders serve the purpose of simulating industrial processes and testing new formulations. This ensures that products comply with stringent technical standards and regulatory requirements.
Multi Measuring Instruments Co., Ltd. was founded in Chiba, Japan in 1986 and is headquartered in Tokyo. As per its namesake, Multi offers a vast array of measuring and testing equipment used across a number of industries. Some of their offerings include voltage meters, network testers, lux meters, cable locators, sound meters, various thermometers, gas analyzers, and water quality meters. Multi Measuring Instruments has a mission for its products to improve the global environment by detecting inefficiencies and leaks, developing products that will be useful for solar and wind power generation.
Alfa Mirage, established in 1966 and headquartered in Osaka, Japan, is a manufacturer that develops products for the general and jewelry industries. The company's product line includes Precious Metal Tester GK 300, Electronic Densimeter, Jewelry Tools and Equipment, and more. It also offers lighting equipment, including LED lights, fluorescent lights, and halogen lights. Its Electronic Densimeter is designed to measure the density of solid and liquid materials and only takes 10 seconds to measure the density of a sample. It has achieved ISO 9001:2015 certification for its electronic densimeter product. Furthermore, it serves the jewelry industries and general industries.
Guangdong Hongtuo Instrument Technology Co., Ltd. was founded in 2000 in Guangdong, China, and is a manufacturer, distributor and supplier of precious metal testers, solid density meters, liquid density meters, and XRF Metal Analyzers. The company owns Quarz and DahoMeter, which makes a wide range of equipment such as gold testing machine AU-3000K, gold and silver testing machine AU-120K, concentration and density tester, powder density meter, and handheld xrf analyzer DX-5000.
PCE Instruments UK Ltd., started in 199 and headquartered in Manchester, UK, is a manufacturer and supplier of test instruments, equipment, and tools for weighing, measuring, and control systems. The company offers more than 500 test equipment, including analyzers, inspection cameras, meters, detectors, and sensors, with applications in various fields like data acquisition, electrical engineering, environmental science, building inspection, and food processing. Its manufacturing and development division is ISO 9001 certified, all its test instruments, equipment, and tools are factory calibrated, and the company also provides services for custom test instrument design, installation, and maintenance.
H.W. Wallace & Co Limited, founded in the UK, is a supplier of testing equipment to the rubber and polymer industry. The company's product portfolio includes a comprehensive range of materials testing machines for assessing the physical properties of materials, such as tensile strength, hardness, and durability, quality control equipment helps clients maintain consistency and meet quality standards in their manufacturing processes and advanced NDT equipment that enables the inspection of materials and components without causing damage, ensuring safety and reliability.
Berthold Technologies was founded in 1949 by Dr. Rudolf Berthold, located in Oak Ridge, Tennessee, and is a developer and manufacturer of measuring solutions. The company develops measurement technologies including level measurement, density measurement, bulk flow measurement, online moisture measurement, concentration measurement, and sources and shields. It's products find applications in a wide range of industries, including refineries, oil and gas, chemical and petrochemical, sugar, pulp and paper, food and beverages, building and construction, mining and mineral processing, water and recycling, and power generation. The company holds ISO9001 and ISO14001 certificates,
Toshniwal Brothers Pvt. Ltd (TBP) is an Indian distributor of high tech laboratory equipment and instrumentation that was established in Geddalahalli, Bangalore in 1948. The company offers equipment and instruments for life science applications such as cell sorters, fluorescence microscopes and confocal microscopes, as well as tools for material and nanoscience applications including x-ray diffraction systems, atomic force microscopes, and nanoindenters. TBP products are mainly used in India’s research and development institutions, as well as in its biotechnology, pharmaceutical, chemical processing, metalworking industries.
3 products are listed.