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

Start time – when in the morning will the display system start operation
Stop period – when in the afternoon will the display system stop operation
Light level – in what light intensity will the screen become 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 pieces the percent open or close placement under different conditions such as early on a winter morning to lessen thermal shock or through the summer to supply better shading. The gap actions and speed of movement can be controlled in a few systems.
Time delay – below changeable climate this avoids frequent opening and closing
Wind speed – To reduce high temperature loss, the screen can be closed early below high wind speed conditions
Snow detection – this can open the screen and turn on heat when it starts to snow.
The standard system uses nylon monofilament or stainless steel cables to support the screen materials. 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 either with a manual switch or electronic controller.

Based on the above, the grower is required to enter the following parameters into the controller:

A weather station is required to provide Motor Gearboxes For Greenhouse outdoor light level, temperature, humidity, wind and rain or snow conditions.