Another item on the CalVet that must be constantly checked after each cast is the flow meter. This helps the technician determine how much water has passed on each cast. On each one hundred meter cast each net will allow 7 cubic meters of water to pass through. With a set amount of water passing by, the technician can determine roughly how many organisms, or rough population estimates, there are in a 100 meter column of water.
The Methot, bongo and mult-nets all use flow meters!
i was surprised to find out that these flow meters carry a price tag of about 250 dollars each!