Your question needs to be more specific. You can use many different devices to collect pollen, although the most commonly used for aerobiological monitoring is the Hirst/Burkard type. If this is the one you are interested in and do not know where in your area you can borrow one, I would suggest contacting researchers that have used the equipment previously and might know, see linked publications and references within:

Article Identification of prominent airborne pollen in a city situat...

Article Current glimpse of airborne allergenic pollen in Indian subcontinent

Article Pollen Calendar to depict seasonal periodicities of airborne...

There are several companies that specialize in providing pollen traps for research purposes. Here are a few suggestions:

You may also want to check with other researchers in your field or with your university's research department to see if they have any recommendations or resources for obtaining a pollen trap.

You can borrow a Pollen Trap from your local library, or from a beekeeping supply store.