I want to build some automatically refilling flowers to use in a study of hawk moth foraging behaviour. The flowers will hold 2μl to 20μl of sucrose solution. The system must be capable of automatically recording data.

I need to be able to control:

1. Fill rate (μl /second)

2. Maximum fill volume (this may vary over time e.g. visit 1 moth gets = 20μl, visit 2 moth gets 6μl)

I need to record:

1. When moth drink (time)

2. How long it drinks for (time)

3. How much it drinks (volume)

These flowers must be:

1. Suitable for use in the laboratory

2. Fairly inexpensive (e.g. less than 100 pounds each)

Any ideas as to how I could achieve this?

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