To provide a method and a device for detecting a molten metal level that cause reduced noise and enable detection of a molten metal level with high sensitivity, and that further has an excellent heat resistance property and is capable of tolerating high temperature, even in a duct conveying high-temperature molten metal.
There is provided a device for detecting a molten metal level, in which a heater 2 is wound for thermal insulation around a duct 1 having heat resistance and corrosion resistance. Further, an AC transmitting primary coil 6 is wound around the duct 1, and AC receiving secondary coils 7a, 7b are wound around the duct 1 adjacent to the primary coil 6. In the device for detecting a molten metal level, a heating power supply is connected to the heater 2, a transmitter is connected to the primary coil 6, and a receiver is connected to the secondary coils 7a, 7b, whilst the heater 2 is a non-inductive sheath heater, and the primary coil 6 and the secondary coils 7a, 7b are inorganic insulation cables.
ABE YUJI
ASAHA MAKOTO
KAMATA YOICHI
| JP2002113567A | 2002-04-16 | |||
| JPS57101723A | 1982-06-24 | |||
| JP2009012024A | 2009-01-22 | |||
| JPS5610214A | 1981-02-02 |