# Level and Flow Measurement

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# Introduction To Buoy Level Gauge

##### Author:Vacorda    Source:www.vacorda.com    Date: 2020-09-04 10:32:43

The buoy level gauge is a simple liquid level measuring instrument. It is suitable for the flat-bottomed cone caps and vaulted containers of tanks, tanks, oil tanks, oil depots, etc. in the petrochemical system that store corrosive media, as well as general enterprises and civil buildings. Water towers and water tanks require low-cost level measurement to solve the difficulty of manual level measurement.

Structure diagram of buoy level gauge

Working principle of buoy level gauge

The buoy level gauge is designed according to the principle of force balance. When the liquid level in the tank is at a certain position, the weight of the buoy (W), the weight of the hammer pointer (W1) and the buoyancy force (F) of the buoy immersed in the liquid, the entire system Medium friction force (f), the four forces are in equilibrium (ie WF-W1-f=0). When the liquid level rises, the float is lifted along the guide rope due to the traction rope, and the buoyancy of the liquid, F, increases, causing the four forces of the original balance system to lose balance. Under the action of gravity, the hammer pointer (8) slides down It also continuously indicates the rising height of the liquid level on the scale. In the same way, it can be explained that when the liquid level drops, the buoyancy F of the float decreases, so that the towline and the liquid drop synchronously. Since the weight of the float is greater than the weight of the hammer pointer, the pointer moves upwards. Also when the liquid level continuously drops and changes The pointer can then continuously indicate the drop of the liquid level, so as to achieve the purpose of accurately measuring the change of the liquid level.

Design principle of buoy level gauge

The level gauge is designed according to the principle of force balance. When the liquid level is at a certain height, the weight of the buoy is W, the weight of the heavy hammer needle is W1, the buoyancy of the buoy in the liquid is F, and the friction of the system is. (In equilibrium: W-F-W1-f=0)，When the liquid level rises, the buoyancy F increases, and W, W1, and f remain unchanged, the balance of the above formula is broken, and the vertical pointer slides down. The new balance is not established until the F force is reduced to its original value. If the F force keeps increasing, the liquid level keeps increasing and the pointer keeps dropping. On the contrary, when the liquid level drops, the pointer of the heavy hammer rises to indicate the height of the liquid level.

Guanghua Rd, Qingyang Dist, Chengdu, Sichuan Province, China 备案号：蜀ICP备13021392号-1