EShamaev

Queen conch reproduction has been much studied for the purposes of aquaculture. Spawning can occur six to eight times during a season, and queen conchs have been observed copulating from mid-March to November, during both day and night. (Randall 1964). Spawning occurs when the male, situated behind the female, inserts a black, spade-like penis called a verge into the female’s siphonal notch (Randall 1964). After receiving sperm from the male, the female retains it for several weeks, releasing it while laying eggs in order to fertilize them (Randall 1964). Mass spawning aggregations have been shown to occur (Sterrer 1992). Eggs are laid in continuous strands with as many as three quarters of a million eggs in one strand (Sterrer 1986). Twelve to fifteen eggs per millimeter of egg strand have been observed, with thirteen eggs most commonly found, and strands were laid at an average rate of one and a half meters per hour (Randall 1964). The whole process of laying eggs occurs over less than a day (Randall 1964). Sandy substrate is a requirement for spawning, as the eggs are deposited in sand (Shawl 2004). Water quality, food supply, and temperature all play a role in the spawning process (Shawl 2004). This last factor is observed in the wild, with a reproductive season characterized by temperature increases throughout the summer months, as well as by a twelve hour photoperiod (Shawl 2004).

А кондуктометрические датчики почему не используются? На порядок все надежней...

Только вот это не ПИД регулирование, а П. Пропорциональное. У вас в схеме нет ни интегрирующей, ни дифференцирующей цепи. А в целом для задач аквы вполне пойдет!