LS78 rotary cup flowmeter, LS68 rotary cup flowmeter, LS full series flowmeter

>The LS78 rotary cup low current meter is a river hydrological measurement instrument used to determine the average flow velocity at predetermined measurement points in general rivers, channels, reservoirs, lakes, and other water crossing sections, in order to determine the flow rate of the section.

The measurement range of flow velocity is 0.02-0.5m/s.

2、 Technical data

1. Starting speed of the instrument: V0 ≤ 0.018m/s

2. The rotation diameter of the rotary cup is f=128mm

3. The number of rotations of the cup between each second signal: 1 rotation

4. The mean square error m of the verification formula is ≤± 2%

3、 Instrument working principle and flow velocity measurement and calculation method

1. Working principle
When the water flow acts on the sensing element of the instrument - the rotating cup, due to the difference in concave and convex shapes of the cups on the left and right sides, the pressure will be unequal, and the pressure difference will form a rotational torque and cause the rotating cup to rotate. The faster the water flow, the faster the rotation speed of the rotary cup; There is a certain functional relationship between them, which was determined through experiments to verify the water tank


The LS68 rotary cup flowmeter is a river hydrological measurement instrument used to determine the average flow velocity at predetermined measurement points in general rivers, channels, reservoirs, lakes, and other water crossing sections, in order to determine the flow rate of the section.

The measurement range of flow velocity is 0.2-3.5m/s.



2、 Technical data



1. Starting speed of the instrument: V0 ≤ 0.08m/s

2. Mean square deviation of verification formula: m ≤± 1.5%

3. Rotation diameter of the rotary cup: f=128mm

4. The number of revolutions of the rotating cup between each second signal: 5 revolutions