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			#1  
			
			
			
			
			
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|   ^ would hope a controller wouldn't allow these type things to happen to begin with. Ran my tank with a PLC, used it to controller temp through heaters or fans (evap cooling) and for a bit CO2 based on a reactor's effluent, then a doser. 
				__________________ my tank | 
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			#2  
			
			
			
			
			
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|   Quote: 
 a stuck float). The nice thing is that a secondary temperature sensor and float were wired to the alarms of the controller. You could say that I have a new found respect for redundancy  
				__________________ People who say it cannot be done should not interrupt those who are doing it. --Puck Mag. |