The steps necessary to incorporate air leak testers and the advantages of doing so.
Offers simple suggestions of models according to your intended use. Please give it a try. Use it if you are using air leak testers for the first time, or are confused about which model to choose.
Actual cases of implementation proving useful in various situations.
Describes the various features of air leak testers.
A wide range of information, from the basic theory behind differential pressure air leak testers to applied technology.
These are the frequently asked questions: Consult them if you need help.
Since its foundation, we at Cosmo Instruments have been developing products such as air leak testers, pressure gauges, flow meters, abnormal sound testing systems and the like which work with the increased precision, automation, and acceleration of measurement and testing.Our air leak testers, in particular, have reached many industries and have acquired a top-level share, not only in Japan, but in the world.
Additionally, Cosmo Super Gel, created in the development of sealing material for leak tests, has been applied for use in various fields.
Some time ago, it was supposed that the quality of cars awaiting delivery could be seen by looking at a parking lot of such cars after rain.This is due to the film of oil forming on puddles under oil-leaking cars. The high quality of Japanese cars was demonstrated in this way as well.
Cosmo Instruments was established by engineer Kiyoshi Furuse in 1970, building on a development of an automatic engine leak testing device for a major automobile manufacturer.
Today, air leak testers are used by all automobile manufacturers in Japan, as well as many automobile parts manufacturers, such as fuel system parts, brake parts, steering, lights, and battery. They contribute to production efficiency and improvement in quality.
Further, the use of air leak testers have expanded to medical devices, residential devices, electronic parts and electronic devices, and food containers.
The specifications vary greatly for testing leaks, such as of a container of several liters or of a sealed electronic part of merely several cubic millimeters. We have researched and developed the best testing methods for each one.Up until now, over 50,000 air leak testers have been shipped to market and are each being used in its industry.
Cosmo Instruments will continue to develop products meeting the needs of various uses.
In recent years, Japanese corporations are increasingly shifting to overseas production. The same quality of craftsmanship which is required in Japan is also required internationally, and the number of leak testers being used internationally is also increasing.
Cosmo Instruments has been setting up bases overseas, with representative offices in the U.S.A. and Korea and a representative in Taiwan set up in the 1980s.Bases are now in twelve countries, including China, countries of Southeast Asia, and India.
Most of these countries are already equipped with a system for providing the same level of quality service as Japan with staff specializing in leak testing.
We will continue to make efforts so that leak testers can be used with peace of mind in all countries.
A leak tester is built on technology which can accurately detect slight changes in pressure due to leaks, but that is not all that is required.
Technology which can find causes of pressure change other than leaks and minimize their effects is also necessary.
Many of those causes are due to the testing environment, such as the clamp sealing fitting of WORK, the pipe fixture, or the ambient temperature.
At times, WORK itself could be harboring the problem, such as warping, temperature changes, or interior leaks.
Technology to comprehensively analyze and handle these is the air leak testing technology required of us manufacturers.
We at Cosmo Instruments promise our customers, in our role to supply this technology, to be responsible to the end for leak testing.
Reliability is what is most required of leak testers, and we believe that Cosmo Instruments taking responsibility for leak tests results in trust from the customer.For this reason, we at Cosmo Instruments provide products providing peace of mind to our customers under any use environment and technical support to make full use of them correctly.
Cosmo Air Leak Testers are equipped with a Differential Pressure Sensor (DPS) with a high sensitivity of 0.1 Pa and a high resistance to differential pressure of 5MPa.
This is standard equipment, and achieves high measurement reproducibility and leak sensitivity due to the intelligent air circuit, including an independently developed air valve.
For every leak test, the DPS bears a heavy load of several million times the differential pressure of the leak.The DPS developed by Cosmo can be used over 10,000,000 times at the maximum working pressure without a change in its sensitivity.
Currently, we have solved various problems and provide leak testers which can be used at test pressures up to 16MPa.
The mastering feature which comes standard is a feature which automatically compensates for the effect of adiabatic compression which occurs due to air pressurization.
The leak-free MASTER of the same model as WORK, which had been used for this purpose in contemporary setups, can be replaced by the standard MASTER chamber.
The time required for stabilization of added pressure is shortened, and the setup is capable of a high level of detection with a short time required for measurement.Adjustments for leak tests also become simpler, so man-hours required for setup can be reduced.
It can be said that the contemporary concept of the MASTER comparison method has changed.
The second most important point for inline testers is that they are durable, without failures.
Failures halting production lines and troubles stemming from misjudgments cause large losses.
Frequent breakdowns would also require backup parts.
Leak testers made by Cosmo Instruments have the greatest history of use in Japan, and have been proved to be durable, with low frequencies of failures. We are rated highly by many customers.
Also important is the system of service—how promptly the appropriate response can be given in the event of a failure.
We at Cosmo Instruments have eight sales offices and four service centers in Japan.
We address this issue with a complete system. Leak testers require service before and after purchase, and we have assigned staff dedicated to each.
Most manufacturers of leak testers using the differential pressure method have one difficult problem in common.
It arises from the principle and method that a product is judged as Pass if the differential pressure is below a certain fixed value, close to zero.
In other words, if the DPS output is stopped, if the valve is not functioning, or if conductions or leaks are happening inside the valve or the DPS, differential pressure could fail to occur even if there is a leak, or the pressure could fail to be detected even if it occurs. This is the problem.
Until the sensitivity is checked using the leak MASTER, the failure would not be noticed, passing even defective products.
It seems to be the case that products by many manufacturers of leak testers are not taking adequate measures to counter this issue.
Taking all possible measures to prevent danger of this issue can be said to be a basic necessity for reliable leak testers.
Cosmo Instruments has, until now, encountered many problems and solved them, building up a record.However, there are still several points which require improvement. We will continue to work with all our power to solve these remaining problems.
A prominent issue with leak tests is the effect of the temperatures of WORK and the environment.
We are working on developing methods appropriate for different requirements, starting with the temperature compensation unit for methods correcting the effects of temperature, because of the characteristic of correlation with the surface temperature of WORK.
Further, as a measure regarding temperature, we have developed a method to minimize temperature change by changing the seal gasket.
The elliptical ring that we sell (in kits) are effective as a measure regarding temperature and are low in cost, with the advantage that O-rings of any size can be made in-house.
We would like popularize elliptical rings and strive for even more of an improvement in the performance of leak tests.
Deformation is another impediment to leak tests, along with temperature. Most seal tooling—designed to stop leaks but without the mechanism to keep the sealing surface fixed—are usually not suitable for leak tests.
Effective methods for WORK which can change in shape exist, such as the Intelligent 2 Pneumatic Circuit—with an isobaric process—and the Multi-Comparison Method (patented)—in response to requests for higher precision and shorter testing time.
We at Cosmo Instruments have developed sealing material which is extremely low in hardness and is superior in elasticity and durability.
It can be put to use in sealing uneven or cast surfaces, making it possible to perform leak tests on WORK of shapes which had conventionally been difficult.
This is also a fruition of customers’ requests which prompted the further advancement of Cosmo Instruments’ leak test technology.
By providing our customers with precise methods, we can attain higher quality leak tests.
We will continue working with our customers to solve problems, aiming to manufacture trustworthy products.
Constructing a new building for office and plant in Manesar, Gurugram, Haryana to expand business.
Started a new venture manufacturing plant at Bengaluru.
Took a new shed in Chennai to expand manufacturing business.
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