1. Glass tube level gauge
The glass tube liquid level gauge can have various forms according to the requirements of use. If the requirements are not high, it can be simple and self-made. The liquid level of the precision container can be a smoother and thicker glass tube (to reduce the capillary phenomenon) plus a more precise cursor Scale to read.
A floating magnetic steel (also called float) is installed in the glass tube communicating with the container. Reed relays are installed on the upper and lower ends of the glass tube. As such, when the float is close to the thousand reed relay, the relay generates a switching action. The upper and lower limits of the liquid level can be controlled or alarmed.
Glass tube liquid level gauge is suitable for direct indication of lower pressure, open or sealed container liquid level.
2.Glass plate level gauge
Its structure is to open a thin groove on the thick tempered glass plate, the lower end is connected to the measured liquid of the container with a metal tube, the upper end is connected to the space above the liquid surface of the container with a metal tube, and a valve is connected to the container for operation.
The glass plate level gauge can withstand high pressure (up to 40 kgf/cm2) and can measure the liquid level of various media (such as water, weak alkali, ammonia, various oils, copper propyl, benzene, isopropyl) Drunk, etc.), if you want to measure the liquid level from a larger range, such as 3-4 meters, you can connect several sections of glass plate to form a meter that has a larger range and is resistant to higher pressures. .
In order to prevent the liquid from flowing out of the container when the glass breaks, steel balls are installed in the upper and lower valves connected to the glass level gauge and the container. When the glass breaks, the steel ball can automatically seal under the pressure of the container to prevent the liquid from flowing out.
Because viscous and dark-colored media can stain glass and form sound readings, glass level gauges are not suitable for the measurement of viscous and dark-colored media.
Glass type liquid level gauge is characterized by simple structure, low price, no external energy required, simple installation, suitable for places without energy and requiring explosion-proof, so even if the reading is inconvenient, it is still widely used.
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