Aquaponics System, Engages students in ecology, biology, earth systems, math, history and literature while pairing fish and plants in one integrated system, With Removable lock down plant tray cover, Aquarium cover, Plastic net pots and grow medium, Filter sponge, Pump
Digital Counter For event counting, a fixed counting period can be programmed in a range from 0.1 ms to 99999 s. Counter events (e.g. start or stop) can either be triggered by a signal to the input sockets or manually via switches. The unit includes a plug-in power supply.
Millisecond Counter Apparatus for measuring the time it takes for a ball to fall a certain distance using a digital timer. Very easy to set up and use but nevertheless highly accurate.