Water Cylinder Thermostat

Projects General Guidance
1

I am using my Arduino to control my hot water/hearing system. There is a thermostat on the hot water cylinder and I was wondering if there might be a way to use my Arduino to get the current temp of the water by reading the thermostat.

http://www.honeywelluk.com/products/Temperature-Controls/Pipe-and-Cylinder/L641A/

That's the thermostat. The input and output is 230V, switches it on and off depending how hot the water is.

2

No. It is just a switch.

3

there is a bi-metal sensor.
that is a device that has two different metals bonded together.
they expand at different rates so the metal moves as it gets hotter.
you could put a sensor on the unit to monitor movement. but since it pushes on a switch, the switch restricts movement.

ergo, no joy. you will have to add a separate sensor.

4

Ok, thanks. Never mind then, I'll give up on that idea.