Propeller level switch

Safe operation -60079
Explosion protection for silo level measurement and international certification
There has always been an explosion issue with explosion-proof protection certification. Due to legal changes, new technologies, new research, and industry associations, the diversity of the topic means that the issue has always been open to experts for questioning. Warehouse engineers use certified level meters and switches to avoid danger to those involved in the factory, even at the international level,
The IEC 60079 standard series is used as the basic terms for testing explosion-proof protection equipment, and the IEC 60079 standard series is currently the latest. Today's equipment passing these standard tests is a security investment for future needs.
A high dust operating condition
The continuous flow of bulk and solid materials, such as in factories, in the wood industry, and in agriculture. In dust explosion-proof areas, it is necessary for the material level sensor to be equipped with a housing protection "t". This design is based on the fact that combustible dust is prevented from entering the interior of the shell. This type of protection cannot be replaced, as it may cause overheating or flammable sparks in unprotected circuits, leading to explosions. The design of measuring equipment now includes the function of resistance to electric shock, especially in the plastic industry, where electric shock is the main challenge. Compared to current standards, the requirements of IEC60079 are more stringent. This has a bearing capacity, such as conducting aging tests on plastic shells and sealing rings under ZONE 22 working conditions in the ATEX area. The device must pass these tests. All UWT's rotary level switches Rotonivo and tuning fork level switches Vibranivo meet these strict standards. Therefore, these instruments can be applied in hazardous dust areas Zone 20/21.
Take action in factory safety
When the instrument is applied to gas explosion-proof areas and explosion-proof hazardous areas where dust and gas are mixed, it must meet the safety protection requirements for dust and gas explosion-proof. The optional design factor is' intrinsic safety ', mainly by limiting the energy in the circuit and not causing sparks. Here, the power and signal cables need to be wired in hazardous areas according to the intrinsic safety type. This ensures that the instrument is safe enough to be used in the gas explosion proof zone Zone 0, as well as in the hazardous dust explosion proof zones Zone 20 and 21. The tuning fork level switch Vibranivo can meet this requirement.
Another option is to have a "flameproof housing (d)" to enhance safety measurements. Any explosion triggered inside the shell will be confined within the shell. In this case, on-site wiring does not require intrinsically safe cables. It can also be directly connected to the casing using explosion-proof glands, or simply connected to the protection type "increased safety (e)" junction box through standard cable glands. The anti rotation Rotonivo and tuning fork Vibranivo of UWT both have these two forms, so they can be applied in gas explosion-proof zone 1 and hazardous dust zone 20/21.
Explosion proof without boundaries
Level switches require FM/CSA certification in the North American and Canadian markets. The explosion-proof principle (protection type) is the same as the European system, only