Product Introduction
The LS20B propeller type current meter is a general instrument for measuring the flow velocity in hydrological tests. It is used to measure the average flow velocity of a predetermined measuring point in the water section of rivers, lakes, reservoirs, canals and other rivers, and can also be used to measure the flow velocity in pressure pipelines and some scientific experiments.
The LS20A rotary propeller flowmeter complies with relevant national standards such as GB/T11826-2002 "Rotary flowmeter".
The LS20A rotary propeller flowmeter is widely used in hydrological surveys, water conservancy investigations, farmland irrigation, runoff experiments, etc. It can also be applied to industries or departments such as hydropower, environmental protection, mining, transportation, geology, scientific research institutes, and municipal engineering for monitoring relevant flow velocity or flow rate.
Main technical performance and parameters
1. Rotating diameter of propeller: Φ125mm
2. Hydraulic pitch of propeller b: 200mm (theoretical value)
3. Starting speed v0: 0.03m/s
4. Critical speed vk: about 0.13m/s
(The actual verification value shall prevail. According to statistical analysis, vk is much smaller than the above value.)
5. Speed measurement range: 0.04m/s～15m/s
6. Output signal: Magnetic switch contact on/off signal
7. Number of signals/rotor speed: 2/1 (2 signals per 1 rotation)
8. Capacity of switch contacts: DC U≤24V
I≤120mA
9. Service life of switch contacts: ≥ 107 times
10. Relative mean square error of the entire line m:| M | ≤ 1.5% (for v ≥ vk)
11. Relative error δ:| δ | ≤ 5% (used when v<vk)
12. Working water environment: water temperature ranging from 0 ℃ to+40 ℃
Water depth ranging from 0.2m to 80m
Suspended sediment concentration ≤ 100kg/m3
13. Continuous working time: ≤ 10h
14. Storage environment: Temperature -25 ℃ to+55 ℃
Humidity ≤ 90% RH
