LJ20A type propeller flowmeterDetailed product description：

LJ20A rotary propeller flowmeter

Spiral propeller structure: spiral curved double blade, left-handed, PC plastic
Rotating diameter of propeller D: 1 20mm
Spiral propeller hydraulic pitch b: 20Omm
Instrument starting speed VO: ≤ 0.04m/S
Critical speed Vk of the calibration curve: about 0.13m/s (starting point of the straight line formula)
Flow velocity measurement range V: 0.05~15m/s
Signal component structure: Magnetic steel reed switch electronic switch
Number of revolutions per signal: 20 revolutions
When the relative error of the calibration curve E is V ≥ Vk, E<± 1.5; When VSwitch contact capacity: current ≤ 50mA, voltage ≤ 6V
Working life of reed switch: 70 million cycles
Continuous working time of the instrument: 2 hours (suspended sediment concentration ≤ 50kg/m3, flow velocity ≤ 5m/s, water depth ≤ 10m)
Instrument working water flow conditions
Water depth range: 0.2~50m
Water temperature: O~40 ℃
Suspended sediment concentration: ≤ 10000 kg/m
Salinity: ≤ 2g/L