It is made of high-strength, high-temperature heat-resistant glass and high-quality materials. It also has strong seismic and impact resistance, and is widely used for liquid level display in high temperature and high pressure media in industrial production such as petroleum, chemical, and natural gas engineering.
◆Structural principle:
     According to the principle of the side pass device, the liquid level of the medium in the container is led to the external glass plate level gauge, and the actual height of the liquid level is read from the transparent glass surface.
     The instrument valve stem sealing packing adopts flexible graphite pressure ring, so the sealing performance is better. Safety steel balls are installed in the upper and lower valves of the instrument. When the glass plate is accidentally damaged, the steel balls can automatically close the liquid flow channel under the action of the pressure in the container, which is in the automatic sealing function.