In use the device is connected to an AC millivoltmeter or oscilloscope by means of the 4mm flying leads.
A 3300 turn, 25mm diameter coil on a plastic handle for investigating changing magnetic fields. 

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• Centrifugal pumps working alone or in series or parallel. 
• Two bearing-mounted motors drive each pump independently. 
• The pumps draw water from the integral reservoir. 
• The water travels through strainers and a series of valves to be delivered to a Venturi meter. 
• The water then returns to the reservoir for re-use, keeping water use to a minimum. 
• Instrument and control modules fit into a frame above and behind the pumps. 
• The differential pressure across the Venturi gives flow rate. 
• Each pump has its own inlet valve. 
• A two-way valve in the system allows the pumps to work alone, in parallel or in series.
• It also allows students to see cavitation and understand the use of a Venturi meter and differential pressure measurement to find flow rate.
• Each pump has an electronic Motor Drive to control its speed, a load cell to measure torque and a sensor to measure pump speed. 

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• Static pressure tappings upstream and downstream of the test pipe connect to a water manometer or a hand-held digital pressure meter. 
• The back panel holds the manometer with calibrated scales. 
• The water manometer includes an air valve and hand-pump. 
• The pressure meter measures higher pressures in the turbulent flow region. 
• The hand-pump adjusts the datum of the water manometer. 
• A precision needle valve downstream of the test pipe accurately controls flow rate.
• The water manometer measures lower differential pressures in the laminar and lower turbulent flow regions. 
• To perform experiments, students stand the apparatus on the hydraulic bench and fit the Header Tank. 
• For low flow rate experiments, the Header Tank supplies the test pipe. 

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• A manometer panel holds the manometer tubes vertically. The base has adjustable feet. 
• A common manifold above the tubes has an air pressure-control valve. 
• The apparatus includes a horizontal Venturi tube, a downstream flow-control valve and manometer tubes. 
• Water enters the Venturi meter and its flow-control valve sets the flow rate. 
• This valve is downstream, so it does not cause any upstream turbulence. 
• The manometer panel has a scale behind the manometer tubes for direct reading of the water levels in the tubes.
• Plastic materials and corrosion-resistant finishes throughout the equipment protect against corrosion. 
• To adjust the datum water level in the manometer tubes, students connect a hand-pump to the air valve above the manometer tubes. 

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• The Viscosity and Particle Drag apparatus is a simple falling-sphere viscometer. 
• The self-standing unit holds two glass tubes filled with the test fluids, for comparisons and to minismise draining and refilling of the fluids after experimentation. 
• They drop the sphere into the test fluid at the top of the glass tube. 
• They then use a stopwatch to measure the time taken for the sphere to fall a set distance down the tube.
• The back plate has a low-voltage backlight so students can easily see the test spheres through the fluid. 
• Students fill the two tubes with their chosen test fluid, then select a sphere of the correct density and size for the fluid. 
• The valve system minimises the fluid loss from the tube and helps when draining the tube after the tests are complete. 
• The shapes must fit through the valve at the base. 
• Suitable test fluids include water, thin machine oil, castor oil and motor oil. 

• The balance assembly is an articulated parallelogram, linked to a load cell. 
• The balance assembly is mounted on a carrier that runs along the rails of the Flume.
• The parallelogram resists bending moments so that only the force on the model is transmitted to the load cell.
• The display unit displays the force measured by the load cell. 
• This unit is hung on the flume.

• The Cavitation in a Venturi Unit offers a clear and easy-to-understand display of cavitation. 
• Students create clearly visible cavitation in a Venturi and take measurements of flow and pressure. 
• They gain practical experience of using the continuity equation and Bernoulli’s equation. 
• A thermometer shows the temperature of the water in the tank.
• Pressure gauges show the pressure upstream of the Venturi and the pressure at the Venturi throat.  
• The pump includes electrical protection and the water tank includes a splash cover to prevent water spillage.
• It consists of a robust frame which holds a water tank, an electric pump, a flow-control valve, a flow meter and a Venturi.
• To calculate flow and pressure, different methods of creating cavitation and causes of error.  
• The apparatus is a self-contained, mobile unit

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• A clear culvert models, one of circular and one of rectangular section. 
• Enabling the observation and calculation of both open and orifice flow in a culvert.
• A clear acrylic 60° trapezoidal flume to enable the measurement of flows with the emphasis on low flow situations.

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