Accurate plug-in thermostat?

Apr 25, 2009 9 Replies

Hi,



I got from B&Q a plug-in thermostat for an oil-filled radiator. I use it in a sun-lounge, on a floor-socket.



It is extremely inaccurate, and thus fails to fulfil its purpose.



Has anyone got a recommendation for such a beast? LCD display would be nice, but accuracy is the key requirement (with safety assumed).



TIA, Kostas


Could be that the floor location is not really representative of the air temperature that you feel. Draughts will interfere with it too much.

I'm not surprised it is not working as you would like it to. Being on the floor, that is the coldest part of the room. It can only be accurate when it is about shoulder hight. This is the hight that you feel cold and heat.

Dave

must get my speel chucker running again.

Thanks for the suggestion.

It thinks the temperature is higher than what it is, so I don't think that's the problem. And it thinks so with random degrees or inaccuracy, so I can't meaningfully set compensation. It is set to 20 yet the min temp plunges to 16.5 (starting at 20 or so)...

Any recommendations are still welcome!

TIA, Kostas

Sounds like excessive hysteresis. What technology does the thermostat use?

Does it have a knob or up/down buttons? If it's a knob, with it unplugged, is there an audible click when you turn it through the current air temperature?

Up/down. I can't find it on the B&Q website, I am afraid.

I noticed you said "if a knob" but tried it anyway. It does not click, but it seems to respond (temp rise) to being handled. It felt warm when I picked it up; is this as expected (it is in Auto mode, and has rightly decided it's too warm to supply power)?

I put my other thermometer right next to it. The trusty one says 19.9; the plug-in thinks it's 23.4.

Any recommendation? Does anyone have the ET05?

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Kostas

p.s.: Thanks for the answer Dave; it's not consistently reading colder. Plus, how can a plug-in thermometer be at shoulder height in a bedroom or a lounge?

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Buy another one from B&Q

Take first one back as faulty for money back

If second one just as bad, take that back too.

Bob

What a surprise :-)

It greatly influences (3+ degrees) its own reading when it switches off the current. All I had to do was switch off the floor-socket and it ended up metering to 0.1 deg of the trusty thermometer. I guess when it comes on it cools down.

Useless...

I will try to drill a vent to it and see if this improves things. Got to be careful though...

Kostas

By plugging it into an extension lead?

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