Hi.
Ok. I've posted a topic in the plumbing section about solar water heating, but I need to find out how to control the system.
Basically I need a switch to cut in and out a central heating water pump. The switch needs to take its signals from two thermocouples. When the temperature differential between the two thermocouples reaches, lets say 10 degrees, the switch will close, cutting in the pump. When the temp diff reduces to lets say 5 deg, the switch opens and cuts out the pump. Preferably the temp diff set point needs to be adjustable.
Now!...to me (who knows nothing about electronics), this all sounds like it should be pretty simple....but I know nothing about electronics. Hopefully there will be somebody here who can help me.
1. Where would I get some thermocouples and what sort do I need. They will need to attach to the outside of the pipes.
2. How would I wire them into a switching device?
3. Can I get a cheap switching device 'off the shelf', and if not, what do I use?
Any thoughts would be very much appreciated.
Thankyou.
Ok. I've posted a topic in the plumbing section about solar water heating, but I need to find out how to control the system.
Basically I need a switch to cut in and out a central heating water pump. The switch needs to take its signals from two thermocouples. When the temperature differential between the two thermocouples reaches, lets say 10 degrees, the switch will close, cutting in the pump. When the temp diff reduces to lets say 5 deg, the switch opens and cuts out the pump. Preferably the temp diff set point needs to be adjustable.
Now!...to me (who knows nothing about electronics), this all sounds like it should be pretty simple....but I know nothing about electronics. Hopefully there will be somebody here who can help me.
1. Where would I get some thermocouples and what sort do I need. They will need to attach to the outside of the pipes.
2. How would I wire them into a switching device?
3. Can I get a cheap switching device 'off the shelf', and if not, what do I use?
Any thoughts would be very much appreciated.
Thankyou.