In smaller greenhouses, a manual system opened and closed yourself could be installed. These work easiest when the screen materials is supported by a monitor system.

Start time – when each morning will the screen system start operation
Stop time – when in the afternoon will the display screen system stop operation
Light level – in what light strength will the screen end up being activated either to open or close
Maximum/minimum temperature – what exactly are the limitations of temperature desired
Maximum/minimum humidity – What exactly are the limitations of humidity desired
Gap positions – this units the percent open or close placement under different circumstances such as early on a winter early morning to lessen thermal shock or during the summer to supply better shading. The gap measures and speed of motion can be controlled in a few systems.
Time delay – below changeable climate this avoids frequent opening and closing
Wind speed – To reduce warmth loss, the screen can be closed early under high wind speed conditions
Snow Rack Drive For Greenhouse detection – this can open the display and turn on heat when it begins to snow.
The typical system uses nylon monofilament or stainless steel cables to support the screen material. The screen material can possibly rest along with the network of cables or become suspended by hooks from the cables. A gearmotor powers a drum or rack and pinion that movements the industry leading of the screen materials. Control is certainly either with a manual change or electronic controller.

Based on the over, the grower is required to enter the next parameters in to the controller:

A climate station is needed to provide outdoor light level, temperature, humidity, wind and rain or snow conditions.