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Topic # 115848 9-Apr-2013 10:07
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Is there a device you can plug into the mains, and have it turn on and off the power to connected devices based on temperature?

I'd quite like to do this for my DVS. I have it on a timer, but I'd like to shut it off below a given temperature.

I might even try to daisy chain them somehow. I always want the DVS on between say 11am and 2pm regardless of the temperature, but between 9am and 5pm I want it on if the temperature is over say 15 degrees.

I'd consider making it myself, though while I have theoretical knowledge I'm not 100% confident in my ability working with mains voltages.




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  Reply # 795434 9-Apr-2013 10:26
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timmmay: Is there a device you can plug into the mains, and have it turn on and off the power to connected devices based on temperature?


I searched for this a couple of years ago and couldn't find anything. I wanted a thermostat adapter like the timers you can plug directly to the wall. The idea was to get the oil heater in a bedroom to start at some temperature (such as 15c) and turn off at 19c for example.

I was met with blank stares at electrical shops I tried.





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  Reply # 795435 9-Apr-2013 10:29
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Yes there is
Are you thinking of installing this in the ceiling cavity? Once the cavity reaches x temperature it turns off?

 
 
 
 


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  Reply # 795438 9-Apr-2013 10:34
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  Reply # 795445 9-Apr-2013 10:43
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Can you plug those to a mains outlet like timers, or do you need to fit them inline?




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  Reply # 795449 9-Apr-2013 10:45
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freitasm: Can you plug those to a mains outlet like timers, or do you need to fit them inline?


I am not sure sorry, they look like you may need to wire them inline, or into a box with out lets. I actually have a plug in thermostat that I have had for years but havent seen them around for ages. Will have a look at the make tonight and let you know.

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  Reply # 795451 9-Apr-2013 10:45
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What you want to do sounds ideal for a smart relay with temperature sensors. You can use the smart relay to drive a mains relay and operate your DVS, with different time settings.

Your alternative solution is to use a time clock (to run all the time between 11am and 2pm) and a thermostat with an on board time clock for time related operation on temp. Wire them in parallel and it would work.

You're looking at $200-$400 for parts.

There isn't an off the shelf solution, that i'm aware of, for this sort of thing though

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  Reply # 795453 9-Apr-2013 10:46
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freitasm: Can you plug those to a mains outlet like timers, or do you need to fit them inline?


No, they are just thermostats which are wired into the phase.



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  Reply # 795470 9-Apr-2013 11:15
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I found the inline ones, I was really hoping for a simple plug in one. There are plenty of thermostats around, but none with standard 240V plugs that I can find.

I use a simple $10 digital main timer from the hardware store at the moment. It turns on at 10am, turns off at 4pm, but I change the timings depending on the season and the weather. It's not perfect, but it's not too bad either.




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  Reply # 795474 9-Apr-2013 11:20
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I have no idea if these are effective or not, or if the website is reputable, however a quick Google found this:

http://www.goodsteps.co.nz/catalog/P725_Room-Temperature-Thermostat.html

That looks like what you are after?



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  Reply # 795476 9-Apr-2013 11:23
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That's perfect thanks! Shame the sucker costs $72, it should be a $15 device like the timers.

I've purchased from Goodsteps before, they seem big on energy saving devices.

Can someone please change the title to have "plug" not "plus" please.




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  Reply # 795481 9-Apr-2013 11:38
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They are cheaper here (but in Oz). $40 and discounts for multi buys.

http://www.heatermate.com.au/

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  Reply # 795483 9-Apr-2013 11:42
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  Reply # 795486 9-Apr-2013 11:44
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freitasm: That's perfect... Contacting the AU retailer to find out shipping to NZ.


It says on the page it's AU$10 for ANZ shipping, which suggests Australia or New Zealand. Perhaps ask about shipping for a higher number, I'd probably get a couple, and I live a short walk from you. I don't know exactly where you live, but I walk up in the general direction you live in a couple of times a week for exercise, I may even walk past your house!




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  Reply # 795487 9-Apr-2013 11:45
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  Reply # 795492 9-Apr-2013 11:48
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Just got a reply. Same price for AU/NZ shipping AU$ 9.95 for up to two units. I replied asking for three units. Let's see.




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