Measure hotwater cylinder on/off

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kandjc

119 posts

Master Geek

#151141 15-Aug-2014 11:16

Is there a sensor system that can record when my electric cylinder element turns on and off?
Thanks

SumnerBoy

2074 posts

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#1108917 15-Aug-2014 11:30

You could try adding an energy monitor to either your wholehouse feed, or just the HWC circuit. That is what I have and it is very easy to see when the large 3kW load is turned on/off.

kandjc

119 posts

Master Geek

#1109167 15-Aug-2014 17:03

SB
Can you be more specific please?
A website or name for the device you use?
Thanks

SumnerBoy

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#1109168 15-Aug-2014 17:06

I use the Owl CM160 currently (which I bought in from the UK). I am in the process of upgrading to the Open Energy Monitor project and am going to be using an Arduino with the EmonTX shield plus a number of CT clamps. There is a lot of reading on the OEM site (http://openenergymonitor.org/) but it is a very powerful/flexible solution.

Aredwood

3885 posts

Uber Geek

#1109372 16-Aug-2014 01:01

A simple way - get a mechanical timer - the type with all the pins that slowly rotates. Connect it's motor terminals to the element. So the motor is on when the element is on. This will record the total hours that the element is on for.

But what exactly do you want to measure? Power used by cylinder, number of heating cycles, Time to heat from cold / time to reheat after a shower....., When the power company uses the ripple control to disconnect power to your cylinder, Something else again?