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This section provides an overview for densitometers as well as their applications and principles. Also, please take a look at the list of 18 densitometer manufacturers and their company rankings. Here are the top-ranked densitometer companies as of December, 2024: 1.Tobias Associates, Inc., 2.Cannon Instrument Company Inc., 3.Healicom Medical Equipment Co,.Ltd.
Table of Contents
Densitometers are used to measure the concentration of a specific substance in a gas or liquid.
By measuring the amount of light absorbed or reflected at specific wavelengths obtained through a filter or light (spectrum) divided into fixed increments of wavelengths, the concentration of the substance to be measured is obtained. If the object to be measured is fixed, the sample is irradiated with light of a specific wavelength that is highly absorbed by the object, and the densitometer measures the amount of transmitted (attenuated) light to determine its concentration. Pulse oximeters are also a type of absorbance densitometer that uses light transmission.
The primary use of densitometers is to measure the concentration of specific substances of interest in liquids and gases. They are used in various industrial fields.
In the food industry, there are many products whose quality deteriorates due to oxidation reactions caused by oxygen. In the packaging process, it is necessary to keep oxygen concentration low to prevent quality deterioration. Oxygen analyzers are used to monitor whether the settings of filling, sealing, and packaging machines are correct and whether gas filling is being performed reliably.
In environmental monitoring applications, densitometers are used to monitor the concentration of various gases such as NOX, SO2, CO, CO2, and HCl in the air. Oxygen analyzers for environmental monitoring are also used for safety confirmation, especially in manholes, sewers, tanks, ships, and other places where there is a risk of oxygen deficiency.
In medical applications, various instruments are used to measure blood oxygen concentration (pulse oximeters) and glucose concentration.
In industrial applications, densitometers are used to control the concentration of liquids in production lines. Examples include controlling the concentration of resist strippers and acid-alkali cleaning solutions in the wafer manufacturing process and controlling the concentration of recycled chemicals and oxide/nitride film etchants in the semiconductor manufacturing process.
Trace oxygen analyzers are used in semiconductor manufacturing processes, Ar welding, etc., and can measure the concentration of very small amounts of trace oxygen in industrial gases. Other special devices include those used to measure the color density of ink in printing, and salt concentration meters for ready-mixed concrete.
In experimental science, the color reaction caused by an enzyme reaction is measured to convert the value of enzyme activity. Densitometers are also used to measure the concentration (quantitative analysis) of proteins and nucleic acids.
Densitometers used to measure liquid concentrations are often based on the principle of absorbance spectrophotometry.
In the absorbance spectrophotometry method, light of a certain wavelength is irradiated into a container (cell) containing a sample to be measured. The light transmitted through the cell is detected by an electrical signal from a detector, and the light transmittance (attenuation) is used to measure the substance's densitometer.
When the intensity of irradiated light is I0, the intensity of transmitted light is I, the molar concentration is C, the optical path length (thickness) is l, and the molar absorption coefficient is ε, and -logI/I0 is defined as absorbance A, the following equation is established: absorbance A is proportional to sample concentration C. By creating a calibration curve from this relational equation, the concentration of an unknown substance can be determined. (A = εCl)
There are several methods for obtaining a specific wavelength from the white light of a light source, including the filter method, which uses a filter such as colored glass, the prism method, which uses a prism made of quartz or quartz, and the grating method, which uses a diffraction grating to obtain continuous spectroscopy.
For example, in the filter type, a complementary color filter is placed between the sample and the light-receiving part, and light is measured through a red, green, or blue filter.
The main light sources used are deuterium discharge tubes, tungsten, and LEDs. Detectors include photosemiconductors (photocells) and photomultiplier tubes (photomultipliers). Since the wavelength range that can be measured is divided according to the method of spectroscopy and type of detector, it is necessary to select the equipment and cell material according to the purpose.
On the other hand, in the case of densitometers such as oximeters, which have a specific substance to be measured, only specific wavelengths that are highly absorbed by the target substance are irradiated from the light source, and the light obtained by the detector is converted into an electrical signal and displayed as a concentration.
Densitometers, as mentioned above, have a variety of applications, including those that measure gases and those that measure liquids. Among densitometers that measure liquids, in addition to absorbance spectrophotometry, some measure concentration from the viscous resistance created by vibrating a piece of sensor part in a liquid, and multi-component densitometers that combine ultrasonic waves and electrical conductivity.
There are also various types of oxygen analyzers. For example, there are those for physical and chemical applications that measure concentrations in chambers, glove boxes, and incubators, those for environmental measurements, those for detecting trace amounts of oxygen in production lines, and those for measuring oxygen concentrations inside the packaging. Each application has a different measurement range and limits, so it is necessary to select the right one for the application.
Other types of densitometers include dissolved hydrogen meters used to monitor the hydrogen concentration of dissolved hydrogen gas solutions and ozone meters.
*Including some distributors, etc.
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Haida International Equipment was founded in 2004 as a manufacturer and supplier of Testing Equipment in China. The company deals in various precision testing instruments, machines, and services such as Batteries, Furniture, Textiles, Leather and Shoes, and Rubber and Plastic test equipment. There is also Adhesive tape, Cookware, Luggage, Optical, and Vibration test equipment along with Accelerated Environment Test Chamber (AES) that executes QC inspection on electronic appliances, paper products, metals, research institutes, and lots more. The other testing machines cater to industrial and mining enterprises, colleges and universities, engineering quality supervision stations, and other departments.
Kett Electric Laboratory Co. Ltd., founded in 1946 with headquarters in Tokyo, Japan, is a manufacturer of precision measuring equipment and devices. The company's product line includes near-infrared grain testers, infrared moisture analyzers for wood, whiteness testers, water activity analyzers, and coating thickness electromagnetic probes. These products are used in laboratories and research facilities for the testing of materials and products, as well as in the field to measure the thickness of paint and undercoats. The company serves markets that include agriculture, pharmaceuticals, construction, and food processing.
New Cosmos Electric, a company founded in 1934 and headquartered in Osaka, Japan, is a manufacturer and supplier of gas detectors and alarm systems. The company's product portfolio includes portable gas detectors, odor sensors, steel dust meters, air quality monitors, and gas detection and alarm systems. These products are utilized by various industries, including the energy industry, steel, construction, transportation, and livestock industries. The company is both ISO 14001 and ISO 9001 certified, with offices and distributors in the USA, Thailand, France, Europe, and Brazil.
Yantai Keda Instrument Co., Ltd. has been a manufacturer and supplier of automatic instruments since 2003 in Yantai Area, China. The products are float ball level sensors, magnetic level indicators, radar level transmitters, magnetostrictive level sensors, and level switches for rotary, tuning fork, and RF level switches. It also produces flow meters such as electromagnetic, vortex, channel, oval gear, and ultrasonic flow meters. The company has CE, RoHS, Explosion Proof, ISO 9001, and SVHC certifications.
Aarna Systems and Wellness Pvt. Ltd., in Udaipur, Rajasthan, India, is a manufacturer, exporter, importer, and supplier of metabolic and bone health solutions and was established in 2009. The solutions are ultrasound bone densitometers, thermal imaging cameras, temperature measurement terminals, and DEXA bone densitometers used in orthopedic hospitals, academic institutions, pharmaceutical firms, and the diagnostic medical imaging sector. The company exports the products to Saint Helena, American Samoa, Afghanistan, and Macau S.A.R.
Shanghai UGP International Training. Co., Ltd., established in 2001, is a manufacturer and supplier of packaging, printing, food processing, plastic, converting machinery, and related consumables. The products include machinery for digital printing & finishing, packaging, pharmacy processing, hot paper bag making, and import machinery. The company provides presale services such as information about the machine, insale services such as delivery within 30 to 45 days, and after-sale services such as repair and replacement for free.
Xuzhou Pinyuan Electronic Technology Co., Ltd., founded in 2013, is a manufacturer of health medical equipment headquartered in Jinqiao Zhigu, Technological Development Zone, Jiangsu Province. The equipment includes ultrasound bone densitometer for bone density testing, bone densitometer assembly, trolley ultrasound, DEXA bone densitometry, and portable bone densitometry. The company passed ISO 13485 and ISO 9001 Internation Quality System in 2015 and got the CE, LVD, and ROHS certificates in 2016. The company has been awarded Intergrity Unit of Medical Device Manufacturing Enterprises severally.
Suzhou Qiantong Instrument Equipment Co., Ltd. is a manufacturer of testing machines and laboratory equipment, established in 2014 and located in Jiangsu, China. The testing machines and supporting test fixtures are used to test rubber, solar PV, packing material, rubber, metal material, and mask-relative testing machines used in medical equipment, auto parts, aerospace, laboratories, and photovoltaic industries. The company has ISO quality management system certification, High-tech Enterprise certificate, EU CE certification, and Type Approval certificate for measuring instruments.
Qingdao Haitongyuanda Special Instrument Co. Ltd. is a manufacturer of drilling fluid and oil well cement analysis instruments established in 1978 and located in Qingdao, China. The company offers analysis equipment for drilling fluids such as sand content test kits and high pressure and high temperature (HPHT) filter presses. It also offers oil well cement testing equipment including pressurized fluid densitometers and atmospheric consistometers. The company’s products are commonly used by clients in oil and gas exploration and energy production operations.
Cannon Instrument Company Inc. founded in 1938 by Dr. Michael R. Cannon, is a manufacturer, offering a diverse range of quality viscosity-related solutions including glass viscometers, viscosity standards, automated viscometers, and constant temperature baths. The company has gained global reach for its viscosity-related products and services. With a legacy spanning over eight decades, Cannon Instrument Company is a big name in the field of viscosity measurement. Since its inception, the company has uplifted to its status as a provider of essential products for various industries requiring precise viscosity analysis.
Ditech, Ltd. is a manufacturer of sensors and detectors for industrial applications that was established in Osaka, Japan, in 1975. The company produces liquid transmitters such as turbine flow meters and vibrating viscometers, and liquid detectors such as dissolved oxygen meters and portable moisture detectors. It also offers various level transmitters and switches, including conductive, capacitive, and ultrasonic model types. The company’s products are primarily used by clients in the food and beverage, petrochemical, and environmental industries.
Fuji Ultrasonic Engineering, established in 1976 and headquartered in Shizuoka, Japan, is an ultrasonic applied product designer and manufacturer. The company's products include ultrasonic gas concentration meters, ultrasonic liquid concentration meters, ultrasonic viscosity meters, which are used in ultrasonic underwater communication systems and underwater relay systems, and ultrasonic vibration-assisted cutting and milling centers. These products are also used in liquid and gas flow and measurement control systems by various industries, including agriculture, irrigation, petroleum processing, and viscosity and temperature measurements in laboratories for adhesives, coating materials, and oil.
Aarna Systems and Wellness Pvt. Ltd, founded in 2009. Our top priority is our clients' satisfaction, and we strive to provide unparalleled expertise in the medical industry. Our advanced range of densitometers, including ultrasound bone densitometers, Dexa Bone Densitometers, and portable bone densitometers, are widely used. We prioritize exceptional customer support to achieve maximum client satisfaction. Our team of highly skilled professionals is dedicated to delivering modern technology and high-quality, durable products to our clients. We offer competitive market prices for our medical equipment, including oxygen concentrators and the Face Recognition Temperature Measurement System.
Healicom Medical Equipment Co, Ltd., is a supplier of medical equipment in Yuhuatai Distinct, Nanjing, Jiangsu, China, and was established in 2002. The product categories are X-ray machines, sterilizers, surgical equipment, ultrasound machines, and infant equipment. It also produces hospital furniture, dental equipment, medical opticals, veterinary equipment, and clinical lab products such as oxygen concentrators, medical training manikins, ophthalmic products, hemodialysis rooms, and medical consumables. The company offers a warranty on selected items, technical training, return agreements, and freight services.
Henan Forever Medical Co., Ltd., founded in 2016, is a supplier and exporter of medical equipment based in Jinshui District, Zhengzhou, China. The company’s products include biochemistry analyzers, ultrasound diagnosis, anesthesia ventilators, medical sterilizers, and blood cell dialysis analyzers used in healthcare applications. It also provides medical consumables, film image equipment, laparoscope instruments, and dental equipment such as dental systems, portable dental X-ray cameras, dental automatic sealers with print functions, and portable dental X-ray sensors for dental uses. The company offers operational training, installation, one- to two-year warranties, and spare parts for a lifetime.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Tobias Associates, Inc. |
11.1%
|
| 2 | Healicom Medical Equipment Co,.Ltd |
11.1%
|
| 3 | Xuzhou Pinyuan Electronic Technology Co., Ltd. |
11.1%
|
| 4 | Cannon Instrument Company Inc. |
7.4%
|
| 5 | Yantai Keda Instrument Co.,Ltd. |
7.4%
|
| 6 | Henan Forever Medical Co.,Ltd |
7.4%
|
| 7 | shanghai ugp international training.co.,Ltd |
7.4%
|
| 8 | Suzhou Qiantong Instrument Equipment Co., Ltd. |
7.4%
|
| 9 | Wellness Pvt. Ltd. |
7.4%
|
| 10 | FUJI ULTRASONIC ENGINEERING Co.,Ltd. |
7.4%
|
Derivation Method
The ranking is calculated based on the click share within the densitometer page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
China
|
7 | 53.8% |
|
Japan
|
4 | 30.8% |
|
India
|
2 | 15.4% |
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