Didac International
Janakpuri, New Delhi, Delhi
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Hydraulics And Hydrology Instruments

Prominent & Leading Manufacturer from New Delhi, we offer advanced hydrology study system, drainage and seepage tank, ground water flow unit, laboratory flumes and channels, laser piv system and mobile bed and flow visualisation tank.

Advanced Hydrology Study System

Advanced Hydrology Study System
  • Advanced Hydrology Study System
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Approx. Price: Rs 3.4 Lakh / Piece(s)

Description of Advanced Hydrology Study System


The unit comprises a sand tank, made of stainless steel, measuring 2 meters by 1 meter. Water may be input to the sand tank from spray nozzles located above the tank (simulating rainfall), from an inlet tank simulating a river flow or from two french drains buried in the sand at either end of the tank. The water is output either from an outlet tank and flow measurement system located at the end of the main sand tank, from one or both of the two wells located in the tank, or one or both of the French drains.

A large plastic sump tank is located under the sand tank.


Capabilities of Advanced Hydrology Study System


  •  Determination of run-off hydrographs from model catchments including multiple storms, moving storms, effect of reservoir storage and land drains
  • Construction of draw-down curves for one or two well systems in a sand bed
  • Hydraulic gradients in ground water flow .Investigation of model stream flow in alluvial material
  • Formation of river features and development over time
  • Sediment transport, bed load motion, scour and erosion


 Features of Advanced Hydrology Study System


  • Stilled inlet tank provides developed river flow conditions, allowing the full length of the tank to be used for river simulations
  • Novel outlet tank design for water flow and sediment flow measurement
  • Stainless steel sand tank
  • Dual jacks provide adjustable tilt
  • Adjustable spray nozzle height
  • Use of fine grade sand allows detailed feature development
  • Single grade of sand for all defined demonstrations, no need to change the sand
  • Control and measurement of inlet flows
  • Flexible configuration allows a wide range of simulations
  • Flexible configuration allows a wide range of simulations
  • Computer data logging option for sediment and water outlet flow measurement
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Additional Information:

  • Item Code: DIHH107
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Drainage And Seepage Tank

Drainage And Seepage Tank
  • Drainage And Seepage Tank
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Approx. Price: Rs 3.2 Lakh / Piece(s)

Specification of Drainage and Seepage Tank

 

  • A self-contained facility for study of flow through permeable media. The tank has a toughened glass front and aluminium back to permit the insertion of pressure tappings as required. Six tapping points are provided. The design of the side supports allows free access to the interior with minimum sight obstruction. Supply includes sump tank, pump, starter and control valve. Also a dye injection system and a selection of models.
  • Comprehensive instruction manual with data sheets and student experiments.
  • Working section 1500mm x 100mm x 600mm

 

Description of Drainage and Seepage Tank

 

  • The bed of the tank is made from painted mild steel. The sides of the tank are supported and sealed by a well proven method which allows free access to the interior and results in minimum sight obstruction. One side is of toughened glass to give good scratch-free visibility over a long period of use while the other is made of aluminium which permits the insertion of pressure tapping points as required. The ends of the tank are made of steel plate.
  • Adjustable overflows are provided close to each end of the tank so that constant water levels may be maintained in each half of the tank. These may be lowered to a position close to the bed of the tank for some experiments to provide sub-soil drainage. The equipment is self-contained, requiring only an initial fill with cold water and connection to the electricity supply. The sump tank can be emptied to a laboratory drain.
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  • Item Code: DIHH117
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Ground Water Flow Unit

Ground Water Flow Unit
  • Ground Water Flow Unit
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Approx. Price: Rs 3 Lakh / Piece(s)

Specification of Ground Water Flow Unit

 

  • A bench-standing sand tank capable of demonstrating, on a small scale, the hydrological principles of ground water flow.
  • The unit allows simple three dimensional flow situations to be set up quickly and measurements of piezometric levels taken at appropriate positions within the model under study.
  • The accompanying instruction manual describes six basic demonstrations of importance in Engineering Hydrology.

 

Description of Ground Water Flow Unit

 

  • The sand tank is manufactured in glass reinforced plastic for durability in service and is located in a painted mild steel frame which is designed for standing on a laboratory bench.
  • A diffused water inlet/outlet with associated flow control valve is installed at each end of the sand tank. This facility allows the desired water table to be established for the various demonstrations of groundwater flow.
  • Two wells with control taps in the base of the tank allow studies of abstraction. Nineteen tappings in the base of the tank arranged in a cruciform configuration are connected to a multi-tube manometer on the side of the tank. These indicate the profile of the water table in the sand. A sliding cursor permits measurement of any level.

 

Technical Specification of Ground Water Flow Unit

Tank

  • Length: 990mm
  • Width: 490mm
  • Depth: 235mm

Mamometer

 

  • Range: 0 to 155mm
  • Calibrated: 1mm intervals
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  • Item Code: DIHH120
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Laboratory Flumes and Channels

Laboratory Flumes and Channels
  • Laboratory Flumes and Channels
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Approx. Price: Rs 3.4 Lakh / Piece(s)
To satisfying the varied demands of our valuable clients, we are highly engaged in offering optimum quality Laboratory Flumes And Channels in the market. This offered range has fixed bed or variable slope, self-contained or laboratory supplied water, open circuit or re-circulating sediment load and choice of working section materials. Apart from this, customers can avail the offered range from us at the most economical prices as per the detailed demands of our valued clients. 

Features: 

  • Technically tested
  • Dimensional accuracy
  • Longer life


Technical Specification of Laboratory Flumes and Channels:


  • Laboratory Flumes and Channels for Hydraulic Teaching and Research Studies
  • New research flumes available as standard

 

Standard Flumes:


  • Special Flumes, Tanks and Basins
  • Ancillary Equipment
  • Sediment Transport Facilities
  • Mono and Random Wave Makers
  • Instrumentation
  • This brochure presents the full range of channels/flumes available from, both teaching & research, standard & special.
  • There are also general comments about the design, flexibility & accuracy of flumes in order to assist those embarking on the specifying & purchase of flumes for advanced studies or research.
  • Usually channels are of rectangular prismatic section. The dimensions of the working cross-section and length are the principal features which determine both the functional suitability and the cost of a channel.


Depending on customer requirements, channels can be designed to incorporate the following alternative features:


  • Fixed bed or variable slope
  • Self-contained or laboratory supplied water
  • Open circuit or re-circulating sediment load
  • Choice of working section materials (glass, metal, wood)
  • Inclusion of a wave generator and beach
  • Instrumentation systems for flow, velocity, level, etc.
  • Sediment sampling
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Additional Information:

  • Item Code: DIHH104
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Laser PIV System

Laser PIV System
  • Laser PIV System
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Approx. Price: Rs 3.2 Lakh / Piece(s)

Specification of Laser PIV System

Laser:

  • Solid-state air- cooled 200 mW, 660 nm laser diode (Class 3b).
  • Standard optics produce a c. 3 mm thick, 45° light sheet (c. 200 mm wide at 250 mm).
  • Interchangeable 20° light sheet optic available (item H41-3).
  • Pulse separation (t) of between 100 µs - 5 s (in steps of 10 µs).
  • Pulse width of between 10 µs - 32 ms (in steps of 10 µs).


Camera:


  • Super-sensitive VGA CMOS sensor:
  • 640 — 480, 6.0 µm pixels (1/3?? format);
  • ~50% quantum efficiency at 660 nm;
  • 75 - 110 dB dynamic range;
  • 4.8 V/lux·sec sensitivity.
  • Trigger input enables image pair acquisition to be synchronised with external events.
  • Accepts standard CS- or C-mount lenses (12.5mm f/1.4 lens supplied).
  • Camera exposure can be linked to the lasers pulsing, thereby enabling operation in a lit room.


Software Processing:


  • Data refresh and recording rate up to 16Hz (dependent on the computer speed, the selected acquisition and PIV analysis parameters and the recording taking place)
  • Real-time, or offline, 2-component vector calculation.
  • Single pass or adaptive multi-pass cross-correlation with 8, 12, 16, 24, 32 or 64 pixel window sizes.
  • 0% or 50% window overlap (i.e. maps of up to 19,000 vectors).
  • Optional vector interpolation and filtering


Based On:


  • User-supplied velocity limits;
  • RMS of neighbouring vectors values.
  • Calculation of the following derived scalars:
  • Vector angle and magnitude;
  • Vorticity and swirl;
  • Time-averaged mean velocity;
  • RMS and turbulence intensity.
  • Where applicable, vector component and statistical sample number are user-defined.
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Additional Information:

  • Item Code: DIHH111
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Mobile Bed and Flow Visualisation Tank

Mobile Bed and Flow Visualisation Tank
  • Mobile Bed and Flow Visualisation Tank
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Approx. Price: Rs 3.1 Lakh / Piece(s)

Specification of Mobile Bed and Flow Visualisation Tank

 

  • A self contained recirculating water tank for flow visualisation and mobile bed studies.
  • The tank is manufactured from glass reinforced plastic and all components in contact with water are of non-corroding materials.
  • The working section has minimum dimensions of 2m(4m) x 610mm and the flow range is 0-3.5 litres/sec.
  • Fifteen models and accessories are included as standard and a sheet of coloured glass allows rapid changeover from mobile bed to flow visualisation mode.
  • All controls are housed in a portable console which includes a flexible cable and water safe connectors.

 

Technical Specification of Mobile Bed and Flow Visualisation Tank

 

  • Working area: 2 metres x 610mm or 4 metres x 610mm
  • Max water depth: 120mm
  • Thickness of sand bed: 60mm
  • Flow range: 0-3.5 litres/sec
  • Sump capacity: 300 litres
  • Accuracy of flow metering: ±1.5% of full scale deflection
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  • Item Code: DIHH118
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Propeller Velocity Flowmeter

Propeller Velocity Flowmeter
  • Propeller Velocity Flowmeter
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Approx. Price: Rs 3.1 Lakh / Piece(s)
Technical Specification of Propeller Velocity Flowmeter

  •     Measurement of velocities in clean conductive fluids within the range 25 to 1500mm/sec (up to 3000mm/sec with high speed probe)
  •     Operation in confined spaces with limited intrusive effects
  •     Suitable for both laboratory and field applications – battery powered (rechargeble) and fully portable
  •     Measurements are indicated on the digital and may be connected to a data logger for later analysis.
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  • Item Code: DIHH109
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Rainfall Hydrographs

Rainfall Hydrographs
  • Rainfall Hydrographs
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Approx. Price: Rs 3.4 Lakh / Piece(s)

Specification of Rainfall Hydrographs

 

  • A unit designed to obtain catchment rainfall and runoff values as functions of time.
  • Comprising a bench- or floor-standing tank with two overhead square pattern spray nozzles supplying water via a flow control valve, flow meter and solenoid valve.
  • A motor driven traversing vessel with seventeen compartments is moved by timer beneath the outlet at a preselected rate to collect the runoff and provide an immediate display of the hydrograph.
  • The tank is 1.2m in length x 0.8m wide x 0.2m deep.
  • The flow range is 0.4 to 4.4 litres/minute.
  • A comprehensive user manual is included in the supply.

 

Technical Specification of Rainfall Hydrographs

 

  • Tank dimensions:
  • Length: 1.2m
  • Width: 0.6m
  • Height: 0.2m
  • Flow meter range: 0.4 - 4.4 l/min
  • Runoff collector: 17 x 0.5l compartments
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  • Item Code: DIHH119
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Sediment Transport Demonstration Channel

Sediment Transport Demonstration Channel
  • Sediment Transport Demonstration Channel
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Approx. Price: Rs 3.5 Lakh / Piece(s)

Specification of Sediment Transport Demonstration Channel

 

  • A transparent, inclinable flow channel through which water can be re-circulated by a pump over a mobile bed to demonstrate the whole range of bedforms from incipient particle movement to bed wash-out.
  • Three different discharge rates can be selected (and measured) within the range 0.2 to 0.6 litres/sec.
  • The channel slope can be adjusted within the range 0-10%.
  • The working section of the channel is 1.55m long, 78mm wide and 110mm deep.
  • The equipment is self-contained and may be bench-mounted in either the classroom or laboratory by virtue of its portability.
  • A model undershot weir and bridge pier are included for local erosion demonstrations.
  • A water level gauge is supplied to calibrate the overshot weir.

 

Description of Sediment Transport Demonstration Channel

The unit consists of an inclinable channel mounted on a frame, together with a discharge tank and recirculating pump. To commence a demonstration, sand is placed evenly along the channel bed, between the inlet tank and the overfall discharge weir. Water is circulated around the system at one of the three selectable flow rates. The channel slope is adjusted by means of a fine screw jack to which an accurate slope indicator is attached. The channel sides are transparent in order that bed profile changes can be observed, and a section of one side is provided with graphical grid markings to permit quantitative assessments to be made of bedform dynamics.

Technical Specification of Sediment Transport Demonstration Channel

 

  • Channel working section:
  • Length: 1.55m
  • Width: 0.78m
  • Depth: 0.11m
  • Discharge rate:
  • Three fixed flow rates between 0.2 and 0.6 litres /sec, selected by switch on pump
  • Slope: 0 to 10%
  • Sediment diameter: 0.1 to 0.3mm
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  • Item Code: DIHH122
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Wave Probe System

Wave Probe System
  • Wave Probe System
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Approx. Price: Rs 3 Lakh / Piece(s)

Specification of Wave Probe System


A simple and robust system for the measurement and recording of water wave profiles, which uses the principle of measuring the electrical conductivity between two parallel wires. The system is available in 1, 2 or 3 channel form and can display data by high speed recorder or input to a data logger. Alternative lengths of probe are 300mm or 500mm.


Description of Wave Probe System:


  • Each probe consists of a pair of stainless steel wires which dip into the water waves. The electrical conductivity between them is measured, and is linearly related to their depth of immersion hence to wave height. The method is free of meniscus and `wetting effects.
  • The result is a system giving high dynamic accuracy over a wide range of wave heights and frequencies.
  • Energization is conducted by means of an audio frequency drive signal which avoids all polarization effects at the wire interface. The signal is balanced relative to earth, to render the system immune to common mode voltages between the water and instrument earth. The frequency can be altered to permit two or more sensors to operate in close proximity without mutual interference.
  • The probe consists of two 1.5mm diameter stainless steel wires spaced 12.5mm apart and 300mm long or 500mm long as required. Each probe is connected to its own wave monitor module in the electronic console by a twin core flexible cable 10m long. The distance between the console and probe may be increased up to 100m using commonly available low current cables.
  • The power supply module and appropriate number of wave monitor modules are mounted in a console, finished in matte textured blue paint and fitted with four rubber feet and carrying handle.


 Features of Wave Probe System:


  • Easily set up and calibrated
  • High dynamic accuracy
  • Linear calibration over a large range
  • Outputs for high speed recorders and data loggers
  • Can be operated at different energization frequencies to avoid mutual interaction between two or more closely spaced probes
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Additional Information:

  • Item Code: DIHH110
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12, C2C, Pocket 12
Janakpuri, New Delhi- 110058, Delhi, India


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