Engineering Plastic Propeller Type Current Meter Of Water Conservancy Instrument
Specifications:
1 The Rotary Diameter for Propeller: 60mm
2 The Hydraulic Thread Pitch for Propeller: H=120mm
3 Minimum Velocity: Vo≤0.06m/s(Normal)
Vo≤0.05m/s(Premium)
4 Measuring Range: 0.077m/s(Normal)
0.057m/s(Premium)
5 Operational Depth: 0.11.2m(Wading rod)
6 Accuracy:unbiased variance: m≤±1.2%(Normal)
m≤±1.0%(Premium)
V<0.2m/s:
Relative Error:σ≤±5%
7 Signal: two signals on every rotary
8 Operational Condition:035
9 Continuous Running Time:24h
Applications:
LS20B type propeller flowmeter is a kind of large range hydrological flowmeter, which is
applicable to measure high, medium, and low flow rate of rivers, lakes, channels, reservoirs
and so on. It can also be used for measuring high speed or ultrahigh speed flow rate in
pressure pipe of power station and some scientific experiment.
Measuring principles:
This instrument is designed based on the theory of areas of open channel’s velocity.
After measuring the velocity, the flow can be get:Q=V·S(S is sectional area)
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Velocity measurement
When measuring velocity, the spin paddle type rotor flow meter will be pushed by waterpower.
The built-in signal apparatus produces RPM signal. The formula below can calculate velocity:
(K/b)N
V—————- C/a(m/s)
T
V: the average velocity (m/s)
B/K:the waterpower pitch of blades
a/C: velocity constant
T: lasting time(the unit is s)
N: the number of signals in T time
S: sectional area
Q: flow
K/b, C/a are constants
When measuring, you can setT and then measure N, so the velocity and flow can be
automatically calculated.
Competitive Advantage:
1)Especially extensive speed measurement range, one propeller can satisfy different
measurement requirements.
2)Fine sealing performance makes regular work in operational condition of high speed
high sediment concentration possible. (Highest measurement speed: 4.3m/s, highest
sediment concentration 100kg/m³)
3)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.
4)Low-speed performance—internal friction characteristic.
5)Flexible installment manner and reasonable directional device structure can adapt direction
of current.
6)Fine structure intensity makes installment and support firm and can stand 15m/s high
flow rate impact.
7)Streamline overall and built-in type empennage counter weight reduces water resistance.
No additional deflection moment.
Special remind:
Every time, the charging time should not be more than 5 hours.
Please recharge the battery after it uses up.
Quality of Metlan
We consistently implement our corporate philosophy:Stabilization is the absolute principle,all stability of personnel and raw materials formed to keep the stability of products while leaving factory.After long-term continuous improvement,we are keenly aware of your demand.Metlan products has been strictly checked and t ested to completely rule out your worries in future.
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