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Flow Meter Demonstration Kit: Laboratory Test Benches for Visual Fluid Dynamics Training
Quick Answer: A flow meter demonstration kit is a small pipe loop with a pump, transparent tubes, a tank, and mountings for real industrial flow meters. Silver Instruments builds these benches for technical colleges, training centers, and instrument sales teams that need to show flow measurement principles with live 4-20 mA signals. Typical loops run from 0.5 L/min to 50 L/min at 0 to 6 bar with DN15 to DN50 test sections.
We design these test benches as compact teaching tools. They are not toys. Each bench uses the same flow meter types we supply to process plants, water utilities, and oil and gas sites across Southeast Asia, the Middle East, Africa, and Latin America. You can mount an electromagnetic flow meter on one section, an oval gear flow meter on another, and a vortex flow meter downstream. The clear acrylic or glass pipe lets students watch swirl, bubbles, and dye traces while the transmitter sends a live signal to a display or paperless recorder.
What the Demonstration Kit Includes
A standard bench includes a stainless steel 304 frame, a water tank, a centrifugal or gear pump, manual ball valves, a bypass loop, and transparent pipe sections in DN15, DN20, DN25, or DN40. We install a reference rotameter and two pressure transmitters with local indicators. The electrical panel has 24 V DC outputs for transmitters, a 4-20 mA loop monitor, and terminal blocks for HART wiring.
Most benches run on clean tap water. For electromagnetic flow meter demos, water conductivity should be at least 20 µS/cm. In practice, most city water is fine after you remove air bubbles. For oval gear meter demos with viscous fluids, we use a separate small loop with water glycol or light oil. Viscosity can range from 1 cP to 1000 cP depending on pump type and rotor clearance.
Visual Fluid Dynamics Training with Real Instruments
Instructors often inject food grade dye or use small air bubbles to show laminar and turbulent flow. Students calculate Reynolds number from flow rate, pipe ID, and water temperature. Then they compare the visual flow pattern with the flow meter output. This is where a bench beats a slide deck. A student can close a valve, see the swirl change, and check how the vortex meter responds at low flow cut-off.
Here is the thing. A glass pipe and a turbine meter can show the same physics as a 6 inch process line. The difference is that a training bench works at 50 L/min, not 500 m³/h. That keeps the pump small, the water volume low, and the space requirement under 2 square meters in most cases.
Common Bench Configurations
Configuration A uses a DN20 electromagnetic flow meter on a clear PVC pipe loop. The meter outputs 4-20 mA HART and shows flow rate on a local display. A PT100 sensor reports water temperature. A paperless recorder logs flow, temperature, and pressure every second. This setup is popular at water operator training schools in Vietnam and Malaysia.
Configuration B uses a DN15 oval gear flow meter with a pulse output. The totalizer on the panel counts pulses and shows volume. This bench is useful for fuel, oil, and chemical dosing training because it works with low flow rates from 0.2 L/min to 10 L/min. A paint manufacturer in Southeast Asia used this bench to train maintenance staff before they installed the same meter type on a solvent batching skid.
Configuratio
Configuration D uses a miniature Coriolis mass flow meter for liquid mass flow in kg/h, density in kg/m³, and temperature. This bench is useful for food and beverage training because it shows density changes when students add sugar solution to the water loop. A dairy training center in Chile used a similar bench to explain CIP flow monitoring.
Parameters That Matter for a Laboratory Bench
Specify the pipe size first. DN15 and DN20 benches fit most classroom tables. DN40 and DN50 benches need a floor mounted frame and a larger pump. Flow range depends on the meter type. A DN20 electromagnetic meter works well from 1 L/min to 50 L/min. A DN15 oval gear meter works from 0.2 L/min to 10 L/min. Pressure usually stays below 6 bar. Temperature stays between 5 °C and 45 °C for water based demos.
Do not overlook the electrical side. We wire each meter to a 24 V DC supply and a 4-20 mA loop. Some meters have pulse or RS485 outputs. The recorder can accept four universal analog inputs and displays trends on a 7 inch screen. We have seen customer sites where the bench arrives with meters but no signal wiring. That turns a fluid dynamics class into a plumbing class only.
How to Order and Specify
Tell us the training goal, not just the meter type. For example, if you need to demonstrate empty pipe detection on a magnetic flow meter, we add an empty pipe electrode and a clear section where the water level can drop. If you need to show ATEX Zone 1 wiring for a chemical plant course, we can add an intrinsically safe barrier and a label set for hazardous area practice.
Send us your pipe size (DN), fluid type, flow range (L/min or m³/h), power supply, and whether you need a paperless recorder. Include the fluid conductivity in µS/cm if you want an electromagnetic meter. Include viscosity in cP if you want an oval gear meter. Send this by WhatsApp at +86-25-52155837 or call Tel +86-25-68650347. WeChat is +86 15365082610.
FAQ: Flow Meter Demonstration Kits
Can the bench run with tap water? Yes. Most benches run with clean tap water. For electromagnetic flow meters, water conductivity should be above 20 µS/cm. Flush the loop to remove air bubbles before training.
What flow rates are typical? For DN15 to DN50 training loops, we normally set the pump for 0.5 L/min to 50 L/min. Special oval gear benches can run from 0.2 L/min to 10 L/min for viscous fluids.
Can we install our own flow meters? Yes. We supply flanges, unions, or tri-clamp fittings for different meter body lengths. We can match the bench to your existing meter dimensions.
Does the kit include data logging? Optional. We add a paperless recorder with 4-20 mA inputs, USB export, and Modbus RTU. The recorder displays flow rate, total, temperature, and pressure.
What utilities are required? The bench needs 220 V AC 50 Hz or 110 V AC 60 Hz, clean water or water glycol mix, and a drain point. Some valve options need compressed air at 4 to 6 bar.
For a quote, send the fluid data and training purpose to Silver Automation Instruments. We supply the bench, spare seals, manual, and calibration certificate in one export crate.
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