The DIY Basic Measured Irrigation Controller Kit  is a weather-based irrigation controller and it has everything you need except the evaporator. 
 
	
Completely automatic
	
Smart irrigation controller – the irrigation is controlled by the prevailing weather conditions rather than a program
	
Use for gravity feed or pressurised irrigation (water supply pressure at least 10 kPa)
	
Use for sprinkler or drip irrigation
	
Use for pressure compensating drippers or non pressure compensating drippers
	
You can adjust the water usage by adjusting the control dripper
	
The water usage is directly proportional to the net evaporation rate
	(this is a unique feature of measured irrigation)
	
Responds appropriately to an unexpected heat wave
	
When it rains, water enters the evaporator and delays the start of the next irrigation
	
The water usage is independent of the water supply pressure
	(this is a unique feature of measured irrigation)
	
Uses much less water without affecting the yield
	
Simple and low tech and so easy to assemble and fewer things to go wrong
	
You can leave your irrigation application unattended for weeks on end