Water Current Meter (Pygmy type)
The Balaji HydroMet BHM-H-CM3 Pygmy Type Water Current Meter is a compact and highly sensitive hydrological instrument designed for measuring low water velocities in shallow streams, irrigation channels, minor canals, open channels and hydraulic laboratory models. The instrument uses a six-cup rotating wheel and provides one electrical contact for every complete revolution. The pulse output is processed by the DVI-V1 Direct Velocity Indicator and Logger to display water velocity directly in metres per second.
- Category : Water Current Meter
- Model Number : BHM-H-CM03
- Brand : Balaji Hydromet
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Water Current Meter (Pygmy type)
Balaji HydroMet manufactures the BHM-H-CM3 Pygmy Type Water Current Meter for accurate water-velocity measurement in locations where the water depth is insufficient for using a standard-size current meter.
The instrument is particularly suitable for shallow streams, small irrigation channels, minor canals, drainage channels, laboratory flumes, hydraulic models and low-velocity water-flow studies.
The current-meter body and cup assembly are manufactured from chrome-plated brass. The rotating assembly consists of six hollow conical cups mounted on a brass star-shaped frame. A magnetic or fibre-optic contact chamber produces one pulse for every complete revolution of the cup wheel.
The BHM-H-CM3 has a starting velocity of approximately 0.015 m/s and an operating range of 0.10 m/s to 1.50 m/s. Its high sensitivity makes it suitable for slowly flowing water and shallow-channel applications.
The current meter is supplied with the DVI-V1 Direct Velocity Indicator and Logger. The DVI-V1 receives pulse signals from the meter, applies the programmed calibration equation and displays water velocity directly in m/s. It can also store field observations in non-volatile memory.
The complete field package includes the BHM-H-CM3 Pygmy Current Meter, DVI-V1 indicator, 1.20 metre graduated wading rod, 4 metre connection cable, instrument oil, cleaning cloth, screwdriver set and operating instructions.
What is a pygmy water current meter?
A pygmy water current meter is a compact, highly sensitive current meter used to measure low water velocities in shallow streams, small canals, irrigation channels and hydraulic laboratory models.
What is the BHM-H-CM3?
The BHM-H-CM3 is a six-cup pygmy-type water current meter manufactured by Balaji HydroMet for shallow-water and low-velocity flow measurement.
What is the operating range of the BHM-H-CM3?
The stated operating range is 0.10 m/s to 1.50 m/s, with a starting velocity of approximately 0.015 m/s.
How does the pygmy current meter measure water velocity?
Flowing water rotates the six-cup wheel. The contact chamber generates one electrical pulse for every complete revolution. The DVI-V1 processes these pulses and displays water velocity in m/s using the calibration equation.
Where can the BHM-H-CM3 be used?
It can be used in shallow streams, irrigation channels, minor canals, drainage channels, hydraulic laboratories, model studies and hydrological field surveys.
What is the DVI-V1?
The DVI-V1 is a portable microcontroller-based direct velocity indicator and logger. It receives pulse signals from the current meter, calculates water velocity and displays the reading directly in m/s.
What is included in the standard supply?
The standard package includes the BHM-H-CM3 Pygmy Current Meter, DVI-V1 indicator, 1.20 metre graduated wading rod, 4 metre connection cable, instrument oil, cleaning cloth, screwdriver set and operating instructions.
Who manufactures the BHM-H-CM3?
The BHM-H-CM3 is manufactured by Balaji HydroMet in Roorkee, Uttarakhand, India.
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Brand Balaji HydroMet (BHM) Model BHM-H-CM3 Standard Reference IS 3910:1966 Type Pygmy Type Water Current Meter Current Meter Body All brass parts, chrome plated Bucket Wheel Six hollow conical cups on a brass star-shaped frame Contact System Magnetic or fibre-optic contact chamber Contact Output One contact per complete revolution Starting Velocity 0.015 m/s Sensor Stated Range 0.015 m/s to 0.90 m/s Operating Range 0.10 m/s to 1.50 m/s Accuracy ±1% FS up to 0.30 m/s; ±0.5% FS above 0.30 m/s Bucket Open-End Diameter 2.0 inch Bucket Diameter 0.5 inch Spin Test Rating Greater than 75 seconds Typical Use Shallow streams, irrigation channels, minor canals and hydraulic models Deployment 1.20 m graduated wading rod or overhead suspension arrangement Velocity Readout DVI-V1 Direct Velocity Indicator / Logger -
Shallow stream velocity measurementIrrigation-channel flow monitoringMinor canal discharge measurementLow-velocity open-channel studiesDrainage-channel surveysHydraulic laboratory experimentsPhysical model studiesHydrological field surveysWater-resource engineeringEducational and research institutionsEnvironmental flow monitoringStream-gauging programmes
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Box number 1 Pygmy Water Current Meter Government Calibration Certificate Wadding Rod 120 cm Holder Connection cable with connector 2 -meter Direct Velocity Indicator Model {DVI-V1} Toll Kit Oil Bottle, Screw Driver, Screw Wrench, cleaning Cloth Weight 2.700 Kg Dimension 44X18X11 cm³ Or 18x8x4 inch³
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