According to reports, the quality supervision department conducted a random inspection of 30 batches of products produced by 30 companies, with a sampling pass rate of 83.3%. The spot check also found that a large number of metal entry doors (or metal separation doors, metal doors, and steel doors) have appeared on the Jiangxi market. The appearance of this product is the same as that of anti-theft security doors, but the technical requirements of the enterprise standards they implement are greatly It is lower than the requirements of national standards. For example, the door opening time for destructive testing is ≥ 5 minutes, which is only 1/3 of the national standard A level (the most common level). There are even enterprise standards implemented by individual companies. The key indicators are simply not required.
The ultrasonic level sensor integrates non-contact switch, controller and transmitter into one, suitable for small storage tanks. Ultrasonic liquid level sensor flexible design can be used in the integrated system or a substitute float switch, electrical conductivity and static pressure type sensor, and also suitable for the fluid flow control and chemical feed system of integrated application of ultrasonic liquid level sensor is widely used in all kinds of atmospheric storage tank, tank, small cans and small container, the pump lift stations, waste water storage tank, etc.
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