Channels / Lakes / Rivers Velocity Current Meter Propeller Type

Propeller Velocity Meter

I. LS20B Type Propeller Velocity Meter

1. Introduction

LS20B Type Propeller Velocity Meter had passed the technical appraisal appraise of the Ministry of Water Resources of the People’s Republic of China in 1986 and its performance had reached international advanced level of similar products. This product was awarded the Third Prize of Science and Technology Progress by the Ministry of Water Resources of the People’s Republic of China in 1988 and was honored as China state level new product in 1990. In 1993, it participated in the international flow meter test which was organized by United States Geological Survey(USGS) and its superb performance was well praised by American experts when compared with world famous brands such as American Price AA, Germany Occt-3, Britain Valeport BFM002 and so on.

2. Features

• Especially extensive velocity measurement range, one propeller can satisfy different measurement requirements.
• Good sealing performance makes regular work in operational condition of high velocity and high sediment concentration possible.(Highest measurement velocity is 4.3m/s, highest sediment concentration is 100kg/m³)
• The propeller adopts imported high quality engineering plastics, which is of high impulse strength, stable geometry, and aging resistance. The docimasy coefficient K won’t change in harsh natural condition environment.
• Low velocity performance and internal friction characteristics.
• Flexible installation manner and reasonable directional device structure can be suitable for current direction.
• Good structure intensity makes installation and support firm and can stand 15m/s high flow rate impact.
• Steam-line overall and built-in type empennage counter weight reduces water resistance. No additional deflection moment.

3. Specification

Magnetic type sensor

Velocity range: 0.05~15m/s

Turning propeller diameter: Ø120mm

Propeller hydraulic pitch: H=200mm

Depth range: 50m

Measuring bar: Ø20mm*3.0m (can be discharged into three sections)

Signal frequency: two signals/rotation

Working temperature: 0-40℃

Verification formula relative deviation: ƍ<±1.5%(V≥V_k); ƍ<±5.0%(V<V_k)

Suspended Sediment Concentration: ≤50kgs/m³

Continuous working time: 24 hours

Switch contact capacity: current≤50mA, voltage≤6V

Material: Direction Indicator & Tail: ABS

Others: stainless steel SS304

N.W.:Appox.1.0kgs