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Weighing sensor moisture and durability introduced
Dec 21, 2017

Load cell is a load cell, it is commonly used for static measurement and dynamic measurement. A force sensor that measures the mass by converting one of the measured masses (mass) into the other being measured (output), taking into account the effects of the gravitational acceleration (g) and air buoyancy (f) at the point of use. Therefore, the accuracy and consistency of the load cell and its reliability are the primary sacred responsibilities of its work. How do raw materials and manufacturing processes affect the accuracy, consistency and reliability of the load cell? From the surface, it seems that one Traditional load cells are simply made of aluminum or hardened steel components, strain gauges, compensation resistors, interconnections, filler materials and coatings or coatings. Then two appearance of the same weighing sensor how much different?

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Let us assume that a high quality industrial load cell has: Good moisture resistance - Humidity is the number one cause of load cell failure; Durability - The most conservative design also allows the sensor to withstand more than 100,000 cycles Load without fatigue failure; compliance with published specifications, including linearity, hysteresis, and temperature compensation; and consistency of performance from one batch of sensors to another. Not all sensor manufacturers produce sensors that meet these performance requirements. Now it's time to explain why the load cells produced by different manufacturers look the same but have differences in performance, reliability, and consistency. There are two main aspects:

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The first is the role of durability: The most basic design of the load cell is to determine its durability, it must withstand 100,000 times weighing, will not be caused by mechanical fatigue failure. Using finite element analysis of the computer to optimize the design of the load cell, without any part of the sensor stress concentration, so you can request the stress is concentrated in the site of the strain gauge. This compact design ensures that the load cell can withstand overload.

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The second is moisture-proof: the load cell strain gauge is most susceptible to moisture. Moisture into the resistance strain gage may lead to unstable load cell performance or even overall failure. Therefore, the moisture sensor design is due to the following:

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First, the package resistance strain gauge - with waterproof material covered strain gauge.

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Second, control the environment or create a low-humidity environment - prevent moisture from entering the sealed load cell.

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Third, a high quality composite waterproof seal - to keep the sensor's components unaffected and with minimal permeability over the entire operating temperature.

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Fourth, solder joints, glass and metal cable joints are sometimes effective.

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Fifth, high-quality load cell cables combine tight conductors and enclosures to prevent moisture from entering the interior through the cable core.


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