1、 Overload protection mechanism

The overload protection of weighing sensors is the core design to prevent them from being damaged due to excessive range use.

Mechanical limit structure: By using elastic deformation limit or external mechanical stopper, the deformation of the sensor during overload is limited. For example, when the load exceeds 150% of the rated range, the limit device will directly bear external force to avoid damage to the sensor core strain gauge.

Electronic protection circuit: Integrated overload alarm module, which automatically cuts off power or triggers warning lights when the output signal exceeds the safety threshold. Some sensors are also equipped with self recovery fuses, which briefly cut off power after overload and automatically resume operation after the temperature drops.

Material strengthening design: using high-strength alloy steel or aluminum alloy elastomers to enhance fatigue resistance. For example, stainless steel sensors can withstand short-term overload (such as 200% range) without plastic deformation, extending their service life.

2、 Key points of daily maintenance

Moisture and dust prevention: Regularly check whether the sealing gasket is aging to prevent moisture or dust from entering the strain gauge area. In humid environments, it is recommended to clean the sensor surface with dry compressed air every month and apply rust proof oil.

Avoid impact and vibration: Shock absorbers (such as rubber pads) should be equipped during installation to prevent mechanical impact during transportation or use. It is strictly prohibited to strike the sensor or apply lateral force during operation to avoid strain gauge detachment or elastic cracking.

Electrical connection maintenance: Check the sealing of the junction box quarterly to prevent connector oxidation. If signal drift is detected, use an alcohol swab to wipe the plug and tighten the screws again.

3、 Service life analysis

The lifespan of weighing sensors is usually 5-10 years, but in actual use, it is affected by the following factors:

Overload frequency: Frequent overload can accelerate the fatigue of the elastic body, leading to range drift. For example, sensors that operate at 120% range for a long time may have a lifespan shortened to 3 years.

Environmental adaptability: High temperatures (>80 ℃) or corrosive environments can weaken material performance. It is recommended to choose heat-resistant or corrosion-resistant models (such as HBMZ6 series).

Calibration cycle: It is recommended to calibrate every 6-12 months to promptly detect potential faults. Sensors that are not regularly calibrated may accumulate measurement errors due to zero offset, indirectly shortening their service life.

By designing overload protection reasonably, strictly implementing daily maintenance, and controlling the usage environment, the reliability and economy of weighing sensors can be significantly improved.