H5 - Experiment


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A bench top Venturi tube that allows students to study Bernoulli's theorem by measuring the complete static head distribution along the horizontal tube.

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TecQuipment’s Bernoulli's Theorem is typical of meters used throughout industry. However, it has many more pressure tappings, connecting to water manometers, which allow full study of the pressure distribution along the convergent-divergent passage.

The Benoulli's Theorem apparatus works with TecQuipment’s Digital Hydraulic Bench (H1F, available separately) and stands on the hydraulic bench worktop. The benches measure flow rate, so students can find the Venturi meter coefficients over a range of flow conditions.

The apparatus includes a horizontal Venturi tube, a downstream flow-control valve and manometer tubes. A manometer panel holds the manometer tubes vertically. A common manifold above the tubes has an air pressure-control valve. The base has adjustable feet. 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.

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.

To adjust the datum water level in the manometer tubes, students connect a hand-pump (included) to the air valve above the manometer tubes.

To perform experiments, students set and measure the flow rate through the Venturi. They measure the head at the cross-sectional area at the upstream section, and the head at the throat section. They also note the pressure distribution along the rest of the meter. They then repeat the procedure, reducing the flow rate in increments and taking similar readings each time. Students can compare ideal pressure distribution to measured pressure distribution and calculate the coefficients of discharge for the meter.

View the Digital Hydraulic Bench flyer here.


Comprehensive study of a Venturi meter and Bernoulli's theorem, including:

  • Direct measurement of the static head distribution along a Venturi tube
  • Comparison of experimental results with theoretical predictions
  • Measurement of the meter coefficient of discharge at various flow rates
blog post
Daniel Bernoulli: Bernoulli's Principle and Equation

Today we celebrate the contribution that Swiss mathematician and physicist Daniel Bernoulli made to the world of science and engineering, introducing Bernoulli’s principle for understanding fluid mechanics.

Read the full blog post here.

H1F - Base Unit

A mobile self contained bench with recirculating water supply. It provides water at different flow rates direct to experiments and includes digital flow display for hydraulic and fluid mechanics experiments.

H40 - Experiment

A compact manometer and nozzle flow meter that compares and demonstrates the accuracy, losses and use of fundamental flow meters.

H400 - Experiment

A floor-standing, self-contained apparatus to demonstrate and observe the basic principles of cavitation and its implications on the performance of hydraulic machines and systems.

H408 - Experiment

A mobile, vertical panel featuring various pipe configurations to demonstrate flow and losses in different pipes fittings and valves. Includes Pitot tube, Venturi and orifice meters for flow measurement.

AF11 - Experiment

Allows students to measure the pressure distribution in a convergent -divergent duct to confirm Bernoulli's equation.

H10 - Experiment

A Venturi meter, an orifice plate meter and a rotameter that demonstrates typical methods of measuring the flow of an incompressible fluid and shows applications of Bernoulli's equation.


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