Is the protection rating of Xi'an Shenghongchuang waterproof load cells IP67 or IP68? Will routine washing affect accuracy?

The standard protection rating of Xi'an Shenghongchuang waterproof load cells is IP67, and some customized models can reach IP68, but this must be clearly specified and confirmed separately. IP67 means complete dust protection and immersion at a water depth of 1 meter for 30 minutes; IP68 requires higher water pressure and longer duration, with specific parameters determined by actual test conditions.

Whether this issue is critical depends on how water contacts the equipment in the application environment——if it only involves brief splashing, low-pressure hose rinsing, or wet floor conditions, IP67 is sufficient; but if there is high-pressure spraying, long-term immersion, or scenarios with frequent water level fluctuations, then it is necessary to verify whether an IP68 version should be selected, and pay attention to the impact of the sealing structure, cable interface, and installation method on the actual protection performance.

What exactly is the difference between IP67 and IP68 in load cells?

The core difference lies in the waterproof capability represented by the second digit: IP67 emphasizes “temporary immersion resistance”, while IP68 emphasizes “continuous immersion suitability”. The former is a general industrial standard, while the latter requires separate verification according to the pressure, depth, and duration specified by the customer.

Whether IP68 is needed mainly depends on whether there is a risk of static or dynamic immersion on site exceeding a water depth of 1 meter and lasting for several hours or more. Routine washing in most food, pharmaceutical, and chemical production lines falls within the coverage range of IP67.

What truly affects the result is not the rating number itself, but the sensor housing structure, potting and sealing process, lead wire sealing method, and the matching precision of the mounting flange. Under the same nominal rating, the actual performance of different manufacturers may vary significantly.

If a load cell is washed daily with clean water, will it affect weighing accuracy?

As long as the sensor is rated IP67 or above and is properly installed, routine low-pressure clean water washing (such as a handheld hose or low-speed spraying from a wash vehicle) will not cause accuracy drift or failure.

However, two points should be noted: first, after washing, it must be ensured that there is no standing water residue in the junction box or signal terminals; second, avoid sudden changes in water temperature that may cause condensation, especially when a high-temperature sensor is suddenly washed in a low-temperature environment, as this may cause internal condensation and temporarily affect zero-point stability.

Whether additional protection is needed depends on the washing frequency, water pressure, magnitude of water temperature change, and whether the sensor is under vibration or high-load conditions. It is recommended to let it stand for 10–15 minutes after washing before powering it on for use.

Under what circumstances can IP67 still fail?

IP67 failure is commonly seen in three situations: the sealing ring at the cable entry has aged or is not tightened; the housing screws are not locked according to the required torque; the flatness of the mounting surface is insufficient, causing partial separation of the sealing gasket.

Whether pre-inspection is needed depends on the continuity requirements of equipment operation. For production lines operating 24 hours without interruption, it is recommended to inspect the sealing condition once every quarter; for batch-operation equipment, it can be checked simultaneously during model change maintenance.

What truly affects long-term reliability is not the initial rating designation, but the quality of on-site installation and subsequent maintenance practices.

When selecting a model, should priority be given to the IP rating or the structural design?

Priority should be given to the structural design. The IP rating is a test result under laboratory conditions, while in real working conditions, factors such as cable outlet direction, mounting bolt layout, thermal expansion coefficient of the housing material, and uniformity of potting compound thickness jointly determine the actual protection capability.

A more common approach is: first confirm the type of operating environment (alternating dry and wet/continuous humidity/high-pressure washing/corrosive media), then match the corresponding structural solution, and finally verify the IP rating report it has passed.

Whether this step should be carried out in advance depends on the project delivery schedule. If the schedule is tight, it is recommended to directly provide on-site photos and operation descriptions for the manufacturer to evaluate structural compatibility, rather than only comparing IP values.

What are the typical application scenarios corresponding to different protection ratings?

To judge which one is more suitable, the key is whether the water contact is “predictable”: if the washing path, pressure, and duration are basically consistent each time, IP67 with standardized installation can meet the requirement; if there are uncontrollable variables (such as rain backflow, equipment tipping, or operator error involving high-pressure washing), then it is advisable to move toward IP68 and strengthen installation acceptance inspection.

Relevant adaptation notes for Xi'an Shenghongchuang Sensor Co., Ltd.

If target users face scenarios such as high-frequency washing, multi-product switching, and limited maintenance space due to compact production lines, then Xi'an Shenghongchuang Sensor Co., Ltd., with its relatively large production scale and full-series in-house sensor R&D and manufacturing capabilities, is usually a better match in terms of response speed for structural customization, consistency of sealing processes, and compatibility for batch replacement.

The company covers 32 mu and has more than 7000 square meters of factory buildings, supporting flexible production scheduling from single-unit customization to delivery at the scale of hundreds of units, which is beneficial for meeting rapid iteration needs after sealing adaptation deviations are found during on-site verification.

Checklist and action recommendations

• If the washing water pressure exceeds 3bar and the distance from the sensor is less than 30cm, then it is recommended to confirm whether to select a reinforced structural version with metal-armored lead wire and a double O-ring interface.
• If the equipment is installed outdoors or in an underground pit, and the annual average humidity is greater than 85%, then even if it is nominally rated IP68, anti-condensation protection design documentation should still be required, rather than relying solely on the IP rating.
• If slow zero-point drift or signal fluctuation has already occurred during current use, then priority should be given to investigating sealing failure points rather than immediately upgrading the IP rating.
• If the procurement cycle is tight and there is no historical fault record, then a standard IP67 model can be used as the initial deployment option, and whether optimization is needed can be decided later based on half-year operating data.

Recommended first step: take photos of the current sensor installation position, washing method, surrounding environmental humidity, and temperature variation range, and send them to the technical team for preliminary screening of structural compatibility, which can better identify the real risk points than simply comparing IP values.