Hamron Tech is the world's only specialized manufacturer of waterproof testing equipment that handles all detection methods: distortion detection, differential pressure, gauge pressure, and submersion methods.
The differential pressure method is currently known as the most popular airtight waterproof testing device. The differential pressure method is also referred to as the "volume detection method" because when a constant pressure is applied within a constant volume, the pressure changes due to the volume of the pressurized space changing as air flows into the workpiece. When used as an actual field device, the following factors can appear as judgment noise: (1) Variability in the space (volume) of the capsule when the workpiece is inserted (it is desirable to keep this as small as possible). (2) Variability in the shape (volume) of the workpiece. (3) Changes in the shape (volume) of the workpiece due to pressurization. (4) Pressure changes due to variations in the temperature of the workpiece and its surroundings. (5) Changes in the volume of the pneumatic circuit. While quantitative judgment (defining the leakage amount numerically for pass/fail determination) is possible, these noises can potentially lead to misjudgment. *WPC is not affected by these judgment noises.
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basic information
A master work that has been confirmed to have no leaks in advance and a work that undergoes leak testing are subjected to the same pressure. If there is a leak in the work, a pressure difference will occur, allowing for leak determination. Additionally, in cases where internal pressurization cannot be directly applied, the master and work are placed inside a pressurization capsule, and leaks are determined based on the pressure difference within the capsule. Differential Pressure Method - It is necessary to prepare two works for testing. - Management of the master work (ensuring it is always a good product, etc.) is required. - A dedicated capsule tailored to the work is necessary. - Testing can be conducted without wetting the work with water. - The amount of leakage can be quantitatively defined for pass/fail determination. - It is susceptible to various judgment noise influences, making operation difficult. Strain Detection Method - Testing can be conducted with just one work prepared. - Testing is possible as long as the work size fits within the device capsule. - Testing can be conducted without wetting the work with water. - Direct measurement of the amount of leakage is not possible. - It is less susceptible to judgment noise influences, making operation easier.
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Company information
We design, develop, manufacture, and sell waterproof testing equipment used in the automotive industry, watch and electronics industry, medical and food industry, mobile phones, smartphones, and portable devices, among others. Since its establishment in 1973, Hamron Tech Co., Ltd. has consistently developed, manufactured, and sold leak testing devices. In particular, the "WPC series" of airtight waterproof performance testers, which employs the "strain detection method," is a technology invented and uniquely developed by our company. It is a groundbreaking product with numerous excellent features as an airtight waterproof performance tester for small sealed items, adopted by all Japanese watch manufacturers. We have secured over 90% domestic market share among waterproof mobile phone and smartphone manufacturers, and we have a significant track record of deliveries to overseas manufacturers, making it a de facto industry standard model. It is also used for testing various products such as waterproof digital cameras, video cameras, and televisions, with cumulative shipments of the WPC series exceeding 6,000 units. We aspire to be a solution planner for our customers' various "leak" related issues. As of October 1, 2023, we have transferred our business to our parent company, Rika Aihara Seiki Co., Ltd. Going forward, Rika Aihara Seiki will handle the sales and maintenance of Hamron products.
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