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A leak tester is a device that electrically detects pressure changes with high-precision differential pressure sensors during airtightness (leak) testing of products and parts. Unlike submerged testing, it does not wet the workpiece, eliminates individual differences, and allows for numerical testing. It is easy to integrate into automated systems. NAC's leak testers enable the automation and standardization of airtightness testing. They are widely used in applications requiring high-precision airtightness testing, such as gas-related, water supply, electrical equipment, automotive parts, medical devices, food containers, and pneumatic and hydraulic equipment. For more details, please contact us or download the catalog.

A leak tester is a device that electrically detects pressure changes with high-precision differential pressure sensors during airtightness (leak) testing of products and parts. 【Featured Products】 ● Manual tabletop leak testing device for small parts, NT-600 It detects leaks with high precision by comparing measurements with a master that has no leaks. Compact design and easy to operate. Ideal for service departments and more!! ● Semi-automatic tabletop leak testing device for small parts, NT-700 It detects leaks with high precision by comparing measurements with a master that has no leaks. Compact design and easy to operate. After setting the workpiece in the fixture, simply press the start switch, and it will automatically conduct the inspection until the pass/fail judgment. Perfect for leak testing of waterproof products and parts!! Dustproof and waterproof protection standard (IPX).

The leak tester applies pressure or vacuum to finished products and components, and electrically detects pressure changes in the event of a leak using a highly sensitive differential pressure sensor. Since leaks are detected electrically, it is easy to quantify and automate leak testing, which was not possible with traditional visual inspection methods. The elimination of the drying process and the removal of individual differences in detection capability are also significant advantages. We provide testing machines that are particularly suitable for airtightness testing of automotive parts, gas/water supply components, mobile phones, digital cameras, and medical devices. We will verify the testing methods that match your testing conditions at the leak test lab. *For examples of leak tester implementations, please visit our website. For more details, please download the catalog or feel free to contact us.

We are specialists in industrial measuring instruments, including leak testers, cup collars, and labor-saving and automation devices. === Please contact us if you would like a comprehensive catalog === We manufacture various essential products for industries such as automotive, electronics, gas and water supply, and medical sectors. With a mission to achieve shorter delivery times and lower costs through in-house development, a prompt and accurate follow-up system, and the development of unique technologies only specialists can provide, we deliver products that ensure customer safety and trust. For more details, please contact us or download the catalog.

This document is a technical material for the leak tester "Leak Tester," which detects leaks in automotive parts, gas appliances, plumbing fixtures, and air and hydraulic systems. Generally, visual inspection using air pressure is employed for leak testing, but the "Leak Tester" allows for both numerical understanding and automation of leak testing simultaneously. This document serves as a useful resource for considering the Leak Tester, including installation achievements, basic knowledge of the Leak Tester, and frequently asked questions (Q&A). 【Contents】 ■ What is a Leak Tester ■ Basic Knowledge of Leak Testers ■ Benefits of Introducing a Leak Tester ■ Case Studies and Customer Feedback ■ Q&A (Frequently Asked Questions) ■ Company Overview *For more details, please refer to the PDF document or feel free to contact us.

This document is a technical material for the leak tester "Leak Tester," which detects leaks in gas appliances, plumbing fixtures, and air and hydraulic systems. Generally, visual methods using air pressure are employed for leak testing, but the "Leak Tester" allows for both numerical understanding and automation of leak testing simultaneously. This document introduces fundamental knowledge about the Leak Tester that you may be hesitant to ask about, various leak testing methods, detection sensitivity, and more, making it a useful resource for considering the Leak Tester. Additionally, you can download case studies of our products in use and customer feedback, as well as our comprehensive catalog, so please refer to them. [Contents] ■ The necessity of leak testing ■ The current state of leak testing ■ Methods of leak testing ■ Direct pressure and differential pressure leak testers ■ Detection sensitivity of leak testers ■ Basic knowledge of leak testers ■ Summary of leak testers *For more details, please refer to the PDF document or feel free to contact us.

The NLT-730T2 is a leak tester suitable for products without an air supply port, such as sealed products. It detects leaks with high precision by comparing measurements with a leak-free master. The operation is via a color touch panel with a width of 134 mm and a height of 92 mm, featuring a wide screen. Measurements are taken twice: the first time with reduced sensitivity to detect large leaks, followed by a second measurement for detecting small leaks. 【Features】 - Automation and standardization of airtight testing are possible. - High precision leak detection through comparison with a leak-free master. - Particularly suitable for products without an air supply port, such as sealed products. - Especially designed for products with minimal spatial volume. - Operation is via a color touch panel with a width of 134 mm and a height of 92 mm, featuring a wide screen. *For more details, please refer to the PDF document or feel free to contact us.

The NLT-370 is a leak tester suitable for use with workpieces that have a high production volume and can be lot-released. It detects leaks with high precision through comparative measurement of workpieces. Its compact design makes it easy to operate. It is widely used in applications requiring high-precision airtightness testing, such as gas-related products, plumbing, electrical equipment, automotive parts, medical devices, food containers, and pneumatic and hydraulic equipment. 【Features】 - Enables automation and standardization of airtightness testing - Widely adopted - Detects leaks with high precision through comparative measurement of workpieces - Easy to operate with a compact design - Suitable for use with workpieces that have a high production volume and can be lot-released *For more details, please refer to the PDF document or feel free to contact us.

It is common for leak testers (air leak testers) and devices to be manufactured by different companies. As a result, when it comes to equipment maintenance, one has to contact separate companies, leading to double the effort and cost. However, our company custom-manufactures testers and devices according to their intended use. This allows for easy equipment maintenance. Additionally, since we design testers and devices based on their intended purpose, we can provide detailed adjustments tailored to your requests! As a helpful resource for considering leak testers, we are also offering a technical document on leak testers. ■ Strengths of Nakku that differ from other companies - By handling everything from production to maintenance in-house, we reduce the total cost of implementation. After installation, you can simply contact us for support. - We can provide demo data measurements before implementation, so you can proceed with confidence. - We have numerous achievements across various industries (automotive, water and gas piping fittings, electrical and electronic components, etc.) * For more details, please refer to the PDF document or feel free to contact us.

This document is a technical material regarding "Leak Testers (Air Leak Testers)" for leak testing in the automotive, gas and water supply, electronic components, and medical and food industries. Generally, leak testing is performed using a submerged visual method with air pressure, but the "Leak Tester" allows for both numerical understanding and automation of leak testing simultaneously. This document introduces fundamental knowledge about leak testers that you may be hesitant to ask about, various leak testing methods, detection sensitivity, and serves as a useful resource for considering leak testers. Additionally, you can download case studies of our products in use and customer testimonials, as well as our comprehensive catalog, so please refer to them. [Contents] ■ The necessity of leak testing ■ The current state of leak testing ■ Methods of leak testing ■ Direct pressure and differential pressure leak testers ■ Detection sensitivity of leak testers ■ Basic knowledge of leak testers ■ Summary of leak testers * For more details, please refer to the PDF document or feel free to contact us.

It was very difficult to set the workpiece using a robot in a leak test where a clamping mechanism is essential to seal the workpiece. However, by using a six-axis robot, we were able to gain a certain degree of freedom in movement, which allowed us to resolve the issue. Additionally, for the loading and unloading, we use air cylinders to keep the slide end in its original position, which results in a design that minimizes displacement in the Y (X) axis. We are moving away from conventional semi-automatic machines (manual workpiece setting) and achieving online automation.

The NLT-130 is a direct pressure air leak tester designed with essential functions prioritized for cost-effectiveness. - Recommended for those who want to implement it as cheaply as possible. - Currently conducting all direct pressure air leak tests manually. It features automatic functions from pressurization to measurement and OK/NG judgment after pressing the start button. The displayed value only shows the pressure within the measurement volume (including piping). *No zero reset during measurement transition. 【Features】 ■ Thorough cost performance ■ No difficult adjustments required without a master tank ■ Compact design for easy operation

Our company offers a leak tester that allows "anyone," "easily," to obtain "high-precision results" in a "short time." There are no disadvantages such as "high costs" and "unstable accuracy" like in visual inspections for submersion, and there is no risk of decreased inspection accuracy due to changes in the workpiece's volume. Please feel free to contact us when you need assistance. 【Other strengths of our company】 ■ Complete in-house support from production to maintenance ■ Demo data measurement ■ Reliable trust and track record ■ Leak test lab that meets various needs *For more details, please download the PDF or feel free to contact us.

At our company, we develop all testers and equipment in-house, which allows us to eliminate the need to outsource to external companies, achieving shorter delivery times and cost reductions. It is common for leak testers and equipment to be manufactured by different manufacturers. As a result, during equipment maintenance, it is necessary to contact separate companies, leading to double the effort and costs. However, at Nack Co., Ltd., we custom-make testers and equipment according to their intended use. By designing testers and equipment tailored to their purpose, we can provide detailed adjustments to meet your requirements. [Features] ■ Easy equipment maintenance ■ Custom-made production tailored to applications ■ Detailed adjustments possible *For more information, please download the PDF or feel free to contact us.

We have established a leak test lab to conduct the selection of testing methods, data collection, technical guidance, and training. We invite our customers to experience leak testing and support the introduction of suitable methods to the test line according to their objectives. If you have concerns such as "What type of leak test is appropriate?" or "I am using a leak tester, but it is unstable," please feel free to consult with us. 【Leak Test Lab Equipment】 ■ Leak testers: various types of direct pressure and differential pressure ■ Digital pressure gauges and digital flow meters of various types ■ Data loggers, soap film flow meters, leak generators, etc. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case in the automotive industry where the impact of temperature on oil viscosity was resolved using a leak tester. Due to temperature effects, the viscosity of the oil was changing, making stable measurements impossible. However, with the airflow method, stable measurements became achievable. Additionally, the need for post-processing was eliminated, improving work efficiency and the working environment. 【Application Examples】 ■ Clearance measurement of sleeves and spools ■ Defect inspection ■ Adhesion and foreign object detection in acoustic components of smartphones/tablets, etc. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case in the water and gas piping joint industry where a leak tester enabled stable measurements and reduced measurement time. As background, stable measurements could not be achieved due to the temperature difference between the workpiece and the master. Additionally, it was necessary to change the master volume depending on the workpiece, making changeovers quite challenging. By using a secondary measurement method, we achieved stable measurements with minimal temperature influence. As a result, it became possible to shorten changeover time and reduce measurement time through multiple part handling. [Case Overview] ■ Background - Stable measurements could not be achieved due to the temperature difference between the workpiece and the master. - Changeovers were difficult as it was necessary to change the master volume depending on the workpiece. ■ Results - Achieved stable measurements with minimal temperature influence through a secondary measurement method. - Enabled reduction of changeover time and measurement time through multiple part handling. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case in the electric and electronic components industry where leak testers have enabled judgment based on the pressure difference between the workpiece and the master. As background, there was a situation where, despite wanting to detect leakage in IP67 class products, it was impossible to apply test pressure due to the sealed container, and thus leakage judgment could not be made. By placing the workpiece inside a chamber and applying a fixed volume of pressure, it became possible to determine the pressure difference between the workpiece and the master. 【Application Examples】 ■ Mobile phones / smartphones / tablets ■ Mobile terminals ■ Leisure transceivers ■ Submersible pumps ■ Water meters, etc. *For more details, please download the PDF or feel free to contact us.