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This section provides an overview for air micrometers as well as their applications and principles. Also, please take a look at the list of 12 air micrometer manufacturers and their company rankings. Here are the top-ranked air micrometer companies as of January, 2025: 1.Lee Power Gages, 2.SYS Industrial Co.Ltd, 3.Nicol Scales & Measurement.
Table of Contents
An air micrometer is a comparative measuring instrument that employs air pressure differences to measure objects. It is predominantly used for measuring the inner diameter of holes or the outer diameter of round rods. Notable for its high precision, an air micrometer can perform non-contact measurements with an accuracy of up to 1μm, which is advantageous for precision-required tasks as it applies no contact pressure and avoids damaging the measured object.
While cylinder gauges and 3-point micrometers are alternatives for measuring inner diameters, air micrometers offer quicker measurements and reduce operator-induced errors.
Air micrometers are primarily used in scenarios requiring high dimensional accuracy, such as measuring the inside diameters of bores in automotive engine parts or the outside diameters of shafts like camshafts and crankshafts. They are also versatile enough for other measurements, including thickness and fine wire dimensions.
Used in the production of plate-shaped products and thin films, the thickness of an object is measured by positioning the instrument between the object and the head.
This technique applies to metal wire, raw silk, and chemical fibers, measuring changes in cross-sectional properties.
Specialized measuring heads enable geometric tolerance assessments, such as straightness in axially long holes and taper and squareness in different cross sections.
By using multiple taper tubes and combining nozzles, the pitch of holes can be measured accurately.
Air micrometers use air flow rate or back pressure to measure object shapes and displacements. For inside diameter measurements, a measuring head slightly smaller than the hole’s diameter is placed inside the hole. Clean, constant-pressure air supplied through a compressor, regulator, and filter is then blown out through a nozzle in the measuring head. The air amount varies with the gap between the object and the head, moving a float in a tapered tube, which is then compared against a master component to determine the hole’s diameter.
Air micrometers offer precision measurement with less susceptibility to oil and dust, thanks to their non-contact nature. They allow for recording exact measurements rather than mere pass/fail judgments. However, they are specific to the parts they measure, offering limited versatility and a relatively narrow range of measurable tolerances.
*Including some distributors, etc.
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Tokyo Seimitsu Co. Ltd., established in 1949 and headquartered in Tokyo, Japan, is a manufacturer of semiconductor production equipment and precision measuring instruments. Its product portfolio includes optical measuring instruments, probing machines, polish grinders, X-ray CT systems, and coordinate measuring machines. In 1952, the company developed Japan’s first high-pressure flow-type air micrometer, and in 1958, it created the world’s first germanium pellet automatic thickness sorting machine. It also developed Japan’s first coordinate measuring machine in 1969, followed by Japan’s first wafer-dicing machine in 1970. The company is the industry’s only semiconductor equipment manufacturer with measurement technology.
SYS Industrial Co. Ltd, established in 2014 and headquartered in South District, Dongguan, China, is a designer and manufacturer of measuring equipment, precision gauges and testing equipment The company’s product portfolio comprises air micrometers, plug and ring gauges, material tensile testers, thread gauges, and block gauges. These products are used in precision inspection and quality control of product shape, position, and dimension in various precision processing industries such as automobile, motorcycle, air conditioning compressor, bearing, military, and aerospace.
DAI-ICHI Sokuhan Works Co, founded in 1944 is based in Ojiya, Japan, and is a manufacturer and supplier of machinery tool accessories. Their product portfolio includes measuring instruments, air micrometers, electronic micrometers, gauges, precision machine parts, spindle units, and kneading dispersibility measurement. The products are manufactured under superior technology and precision with quality control. The products are used in multiple industries which include aircraft, trains, automobiles, and other modes of transportation.
Ojiya Seiki Co., Ltd. is a manufacturer of gauges since 1966 and is headquartered in Japan. The company deals in Screw Thread Gauges that have applications in checking threaded parts of fluid equipment, plumbing parts, and pipes along with Measuring Instruments such as Digital Thread Depth Gauge, and Inspection JIGs that are used to cope with the measuring items of geometrical tolerance. There are also Air Micrometers and Gauge Heads for Air Micrometer along with Measuring Heads PMK series for various dimension measuring. These products have vast uses in the automotive, plumbing and related industries.
Lee Power Gages, founded in China in 2014,is a manufacturer of programable air and electronic micrometers and gauge heads for various measurements. The company's product portfolio includes air micrometers & master gauges, SPC gauging stations, automatic gauging machines, optical measurement, and manual bench gauges and fixtures. These products are used for measurement and process control solutions including statistical process control (SPC system), automatic and semi-automatic measurement and inspection systems, and hardware and software for data collection and process analysis.
TINH HA TRADING & SERVICE CO., LTD, established in 2002 and headquartered in Ha Noi, Vietnam, is a manufacturer and supplier of precision cutting tools, measurement tools, and a wide array of equipment catering to metalwork. The company offers an extensive product range, featuring advanced tools like the ZOLLER Presetting Machine, FARO Portable 3D Laser Scan and measuring machine, BIG Daishowa chuck system, Mitutoyo measuring tools, and Sumitomo cutting tools. These tools are instrumental in ensuring accuracy and efficiency in various metalworking applications.
Apco Tool & Gauge Pte Ltd, is a supplier of engineering gauges and other measuring instruments established in 1988 and headquartered in Zervex, Singapore. The company offers gauges such as thread plug gauges, gauge blocks, feeler gauges, master gears, and precision balls as well as instruments such as inner and outer diameter stylus, standard dial indicators, depth gauges, and air micrometers. It offers gauges from manufacturers who are certified in their standards, including UKAS, BS, A2LA, ANSI, and API, and serves customers covering industries from aerospace, and oil & gas to precision engineering and other manufacturing companies.
Hakudo CO., LTD. established in February 1932 and based in Marunouchi, Chiyoda-ku, Tokyo, Japan, is a manufacturer and supplier of plates. The company's product line includes plates, bars, aluminum tubes, elongated copper products, and stainless steel. These materials are widely used in construction, vehicle manufacturing, electronics production, and in crafting various consumer goods. Predominantly, industries such as Construction, Automotive, Electronics, and Consumer Goods rely on its product offerings. The company also oversees departments such as Administration, Internal Audit, Marketing, and Special Order Products.
Nicol Scales & Measurement, established in 1931 and headquartered in Dallas, Texas, is a distributor and supplier of weighing and measurement equipment. Some of the products that the company offers include industrial scales, laboratory balances, force measurement equipment, material testing equipment, and calibration weights. These products are used for weighing and measuring in diverse industries, including manufacturing, food processing, and laboratory testing. The company even has truck and vehicle weighing scales available for rent.
PT Metro Rekayasa Indonesia, founded in Indonesia, is a supplier of abrasive tools, band saw blades and cutting tools. The company's product portfolio includes comprehensive range of abrasive tools, including grinding wheels, sandpaper, and abrasive belts, suitable for various applications such as metalworking, woodworking, and more. It also offers a variety of cutting tools, from drills and end mills to taps and reamers, tailored to the needs of machining and manufacturing operations.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Lee Power Gages |
23.8%
|
| 2 | SYS Industrial Co.Ltd |
14.3%
|
| 3 | Nicol Scales & Measurement |
14.3%
|
| 4 | DAI-ICHI SOKUHAN WORKS CO. |
14.3%
|
| 5 | PCS Innotec International |
9.5%
|
| 6 | TOKYO SEIMITSU CO., LTD. |
9.5%
|
| 7 | Yakin Maju Sentosa |
4.8%
|
| 8 | Apco Tool & Gauge Pte Ltd |
4.8%
|
| 9 | TOKYO DEVELOPMENT CONSULTANTS THAILAND CO., LTD |
4.8%
|
Derivation Method
The ranking is calculated based on the click share within the air micrometer page as of January 2025. 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 (%) |
|---|---|---|
|
Japan
|
3 | 33.3% |
|
China
|
2 | 22.2% |
|
Vietnam
|
1 | 11.1% |
|
Singapore
|
1 | 11.1% |
Belgium
|
1 | 11.1% |
|
Indonesia
|
1 | 11.1% |
37 products found
37 products
OJIYA SEIKI Co.,Ltd.
80+ people viewing
Last viewed: 2 hours ago
The air micrometer is a digital precision comparison measuring instrument that uses the back pressure (differential pressure) of high-pressure air ...
Pickling Co., Ltd.
130+ people viewing
Last viewed: 2 hours ago
■Features ・Equipped with two types of thickness sensors: air sensor and laser sensor ・No damage to the workpiece due to non-contact measurement ...
DAI-ICHI SOKUHAN WORKS CO.
50+ people viewing
Last viewed: 2 hours ago
Standard Response
Precision comparative length measuring device that electrically magnifies and digitally displays minute mechanical displacements. ■Summary Digimec...
DAI-ICHI SOKUHAN WORKS CO.
50+ people viewing
Last viewed: 2 hours ago
Standard Response
This single unit greatly reduces measurement setup changes. ■Features Multiple measurement heads can be connected to one air micrometer body, allo...
Mahr Inc.
100+ people viewing
Last viewed: 2 hours ago
Standard Response
5.0 Company Review
■Air measurement technology accessories Expansion of the pneumatic measuring station. There are other model numbers available.
10 models listed
DAI-ICHI SOKUHAN WORKS CO.
50+ people viewing
Last viewed: 2 hours ago
Standard Response
High-precision compact type designed for user measurement and needs. ■Features and structure It has a built-in regulator with a width of 67mm, hei...
DAI-ICHI SOKUHAN WORKS CO.
40+ people viewing
Last viewed: 2 hours ago
Standard Response
■Features Fromec is a precision comparison measuring instrument that magnifies and supports changes in the amount of air flowing through minute gap...
DAI-ICHI SOKUHAN WORKS CO.
50+ people viewing
Last viewed: 2 hours ago
Standard Response
Easy to read thanks to the adoption of a highly visible analog meter ■Features ・Easy to read with analog pointer and large scale plate that does n...
DAI-ICHI SOKUHAN WORKS CO.
60+ people viewing
Last viewed: 2 hours ago
Standard Response
■Compact housing packed with various functions ・Automatic screen switching in response to probe (measuring head) movement (2ch) ・Equipped with ma...
DAI-ICHI SOKUHAN WORKS CO.
50+ people viewing
Last viewed: 2 hours ago
Standard Response
Column type bar graph and digital display type that is easy to see at production sites and measurement rooms ■Summary A column type (bar graph & d...
DAI-ICHI SOKUHAN WORKS CO.
50+ people viewing
Last viewed: 35 minutes ago
Standard Response
■Summary admec is a compact, easy-to-use, high-precision air micrometer. The two basic models are the A1 (1ch) type, which provides advanced functi...
DAI-ICHI SOKUHAN WORKS CO.
50+ people viewing
Last viewed: 34 minutes ago
Standard Response
Built-in operation panel and machine control sequence, ideal as a controller for automatic measuring machines ■Features PML is available in the PL...
Daisei Co., Ltd.
200+ people viewing
Last viewed: 34 minutes ago
■Summary A simple and highly versatile flow rate air micrometer that uses a tapered glass tube and a float. When air that has passed through a filt...
2 models listed
30+ people viewing
Last viewed: 6 hours ago
Easy-to-read organic EL display allows for highly accurate accuracy checks. Maintain high accuracy with simple checks. Is the accuracy of your air ...
Daisei Co., Ltd.
280+ people viewing
Last viewed: 34 minutes ago
■Features - You can register and save setting data for 80 models. - There are two display methods: 3-color bar graph and digital. - Has a digital d...
3 models listed
Daisei Co., Ltd.
210+ people viewing
Last viewed: 34 minutes ago
■Features - You can register and save setting data for 3 models. - There are two display methods: 3-color bar graph and digital. - Has a digital di...
3 models listed
Daisei Co., Ltd.
210+ people viewing
Last viewed: 34 minutes ago
■Features - You can register and save setting data for 3 models. - There are two display methods: 3-color bar graph and digital. - Has a digital di...
3 models listed
Daisei Co., Ltd.
100+ people viewing
Last viewed: 33 minutes ago
■Summary Up to 16 gauges can be used with one amplifier, realizing low cost and space saving. ■Features - When the air micro gauge is removed from...
