Melan Measurement & Control Instruments (Shanghai) Co.,Ltd.
MELAN MEASUREMENT & CONTROL INSTRUMENTS (SHANGHAI) CO., LTD.
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5VDC Water Flow Velocity Meter / Water Flow Speed Meter Temperature 0~40℃
HT Handheld Reader
HT-B Type Handheld Reader
1. Introduction
Portable current velocity meter is an equipment used in water conservancy for velocity flow measurement, designed for hydro-logical stations,mining factories, environment monitoring stations, farm irrigation, hydro-geology and so on. Portable current velocity meter is composed of propeller velocity meter, HT type handheld reader and measuring bars. Full set of instruments is in the aluminum-alloy box.When using, you can assemble it as a body and connect the signal cable, then the velocity of every open channel can be measured. And it can automatically display the velocity and present the flow of sectional areas.
The instrument is light and convenient with simple structure. It has low power consumption, complete function, high automation degree, stability and reliability, which complies with the national measurement standards.
2. Specification
Propeller Velocity Meter
LJ2-1A Type Propeller Velocity Meter
1.Introduction
This series of propeller velocity meter is with small structure, light weight and convenient to carry. It is applicable to measure flow rate of scheduled testing point in small rivers, channels, run-off experiment station, water resource investigation, and environmental protection waste water monitoring occasions.
2.Specification
Propeller structure: Spiral curve double-vane laevoroation, PC plastic
Turning propeller diameter D: Ø60mm
Propeller water power pitch b: 120mm
Instrument run-up velocity V0≤0.06m/s
Flow rate measuring range V: 0.07~7m/s
Signal Part Structure: Magnetic steel-reed switch electronic switch
Verification curve relative error E: V≥0.2m/s, E＜±1.5%；V＜0.2m/s, E＞±1.5%
Switch contact capacity: Current≤50mA, Voltage≤6V
Reed switch operating life: 70 million times
Instrument continuous working time: 2 hours(suspend load sediment concentration≤0.5kg/m³, flow rate ≤1m/s)
Instrument installation Measurement Bar Specification: CG16-1 type
Suspension cable shaft corner: LJ12-2A/C type-horizontal 360°, vertical 20°
Flow condition: When assembled with measuring bar, the bottom limit is 0.1m, the upper limit is depended on the length of measuring bar; When assembled with suspension cable shaft, 0.5~40m; Water temperature: 0~40℃; Suspend load sediment concentration: ≤10kg/m³