Anemometer Model 4-cup

Product Code : SCL-PL-12124

The Anemometer Model 4-cup is a classical meteorological instrument used for measuring wind speed and velocity in educational and field environments. Built for physics students, geography classes, and weather monitoring groups, this device captures physical kinetic energy from air currents to provide immediate data on wind flow patterns.

Product Description

The Anemometer Model 4-cup from Science Lab Supplies features a low-friction vertical spindle holding four hemispherical cups arrayed at right angles. When air currents strike the open concave faces of the cups, the asymmetrical aerodynamic force drives the rotor into continuous circular rotation. This mechanical movement correlates directly with local wind velocity, allowing straightforward calibration calculations.

Designed to endure regular outdoor student fieldwork and indoor fan-driven lab setups, this apparatus provides exceptional educational value. The instrument removes the complexity of digital sensors, requiring students to manually count rotations or read integrated dial indicators to determine speed. This device stands as a fundamental component within standard physics lab equipment inventories worldwide.

Key Features

• Four Hemispherical Cups: Precision-molded aluminum or high-impact polymer cups ensure high sensitivity to weak ambient air currents.
• Low-Friction Spindle Bearing: Features a high-accuracy miniature ball-bearing pivot that ensures immediate rotation at low threshold velocities.
• High-Visibility Design: The distinct orientation markings on one cup allow easy visual tracking and manual revolution counting.
• Heavy Stand Foundation: Outfitted with a weighted cast-iron base plate to prevent tipping over during high-velocity wind demonstrations.
• Weather-Resistant Coating: Plated metal elements resist outdoor environmental moisture, protecting the structural frame from premature corrosion.
• Modular Support Shaft: Detachable rod design allows the rotor to be transferred cleanly to custom weather station brackets.

Technical Specifications

What's Included in the Kit

• 1 x 4-Cup Rotor Assembly with lightweight support arms
• 1 x Low-friction vertical spindle rod
• 1 x Weighted cast benchtop stand base
• 1 x Instruction manual with wind velocity calculation charts

Applications / Uses

• Measuring variable wind speed profiles across different outdoor school microclimates.
• Demonstrating fluid dynamics and the aerodynamic drag differences between concave and convex surfaces.
• Supplementing standard weather station kit groups inside comprehensive geography and environmental science classes.
• Providing a rugged mechanical component within student-designed science kits and STEM projects.
• Serving as a highly interactive baseline training tool for understanding professional meteorological instruments.

How to Use the Anemometer Model 4-cup

1. Assembly: Thread the vertical spindle rod securely into the center of the weighted cast base plate.
2. Mount the Rotor: Place the 4-cup rotor assembly onto the low-friction pivot at the top of the shaft, ensuring it spins completely freely.
3. Position the Stand: Set the completed apparatus flat on a stable laboratory table downwind from a variable-speed electric fan or carry it outdoors to an open area.
4. Track Revolutions: Use a stopwatch to track the number of full revolutions made by the marked contrast cup over a one-minute interval.
5. Calculate Speed: Convert the logged revolutions per minute (RPM) into linear wind velocity metrics using the provided calibration chart formulas.

Handling Note: Do not expose the delicate cup assembly to extreme gale-force winds or high mechanical forces, as excessive stress can bend the radial support arms and disrupt rotor balance.

Care & Maintenance

• Clean Bearing Track: Periodically wipe down the vertical pivot spindle with a dry, lint-free cloth to eliminate dust particles.
• Protect from Impacts: Always store the rotor disassembled from the base inside its slot box to safeguard the hemispherical cups from crushing forces.
• Dry Storage: Ensure all parts are wiped free of outdoor condensation or rainwater before replacing the unit inside inventory cabinets.

Why Choose Science Lab Supplies

Science Lab Supplies is a premier manufacturer and global exporter of high-precision scientific laboratory instruments, STEM didactic kits, and mathematics modules. Leveraging decades of intensive manufacturing experience, our specialized production lines follow strict mechanical tolerance testing guidelines to ensure long-term field durability. We cater to university departments, schools, and international wholesale distributors globally, providing exceptional component consistency and optimized international shipping execution for bulk institutional tenders.

Frequently Asked Questions

How does the Anemometer Model 4-cup measure wind velocity?

When wind blows, it encounters the asymmetric shapes of the cups. The air creates higher aerodynamic drag inside the concave side than against the convex side, spinning the spindle at a speed proportional to the wind velocity.

Why does this model use four cups instead of three?

A four-cup configuration offers excellent stability, easy mechanical orientation tracking, and high initial starting torque, making it ideal for clear student visual tracking in educational demonstrations.

Is this anemometer weather-resistant for long-term outdoor use?

The instrument features high-grade polymer cups and plated metallic components that resist rust, but it is optimized as a portable teaching model rather than a permanent all-weather station sensor.

How do students calculate actual wind speed from the spinning rotor?

Students count the rotations of the marked cup over a specific duration to calculate the RPM, then consult the enclosed conversion data table to convert the RPM into meters per second or kilometers per hour.

Can the rotor assembly be detached from the desktop stand base?

Yes, the vertical spindle rod can be unscrewed from the weighted base, allowing the entire upper rotor segment to be adapted into custom weather observation arrays or student engineering setups.

Upgrade your department’s meteorological field gear by exploring our broad selection of premium laboratory instruments today.