In smaller sized greenhouses, a manual program opened and closed yourself could be installed. These work simplest when the screen material is supported by a monitor system.
Start time – when each morning will the display screen system start operation
Stop period – when in the afternoon will the display system stop operation
Light level – in what light strength will the screen be activated either to open up 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 Motor Gearboxes For Greenhouse pieces the percent open or close placement under different conditions such as early on a winter early morning to lessen thermal shock or during the summer to supply better shading. The gap techniques and speed of movement 
can be controlled in some 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 under high wind speed conditions
Snow detection – this may open the screen and turn on heat when it starts to snow.
The typical system uses nylon monofilament or stainless steel cables to aid the screen materials. The screen material can possibly rest on top of the network of cables or end up being suspended by hooks from the cables. A gearmotor powers a drum or rack and pinion that moves the industry leading of the screen material. Control is usually either with a manual switch or electronic controller.
Based on the over, the grower is required to enter the following parameters into the controller:
A climate station is needed to provide outdoor light level, temperature, humidity, wind and rain or snow conditions.