Temperature
Thermistors are thermally sensitive resistors that we use in the greenhouse to measure temperature. There are thermistors in the climate control boxes that are calibrated to 20C and in the hot water supply pipes that are calibrated to 90C.They work by measuring conductivity through the two pieces of metal...at higher or lower temperatures the resistance changes and the computer translates this info to something understandable to us (degree Celsius).
aGreenhouse
Boiler
Leaf
Pipe/Mixing valve
Humidity
Light
Water Flow
CO2
EC
pH
Weight of crop
What is a controller?- A series of microprocessors that do basic computations and number comparisons
Lights
Vent motor
Irrigation/Fertigation pumps/solenoids
Heating pumps
Fans
Heaters/Boilers
CO2 Generator
Curtain motors
Cooling pads
Growscale