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A helium balloon flowmeter is a device that measures the flow rate of helium gas as it is being used to inflate balloons. This can be useful for ensuring that balloons are inflated to the correct size and shape, and for preventing over-inflation, which can cause balloons to burst.

The best type of helium balloon flowmeter for you will depend on your specific needs and budget. If you need a very accurate measurement of flow rate, a mass flow meter is the best option. However, if you are looking for a less expensive option that is still accurate enough for most purposes, a vortex flow meter or ultrasonic flow meter may be a better choice.