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Battery powered water - warmer / Thermostat possible? Answered

Hello.

I am looking to design an enema kit that has a simple built in battery powered thermostat. 

I work with many patients with chronic pain & opioid induced constipation.   They use warm water enemas often to clear their bowels. 

The number one complaint i here is "its too annoying to get the temperature right '

So i was thinking, how could i design a simple design.    It would have to be able to heat 1L of water up to 37-43 Celcius and be battery powered.   So a patient would fill up the 1L enema bag with water, hangit up an turn the heater on with their selected temperature.   THen an alarm will go off and they can administer it with the temperature stable. 

So i guess what im asking is it possible to get a battery powered thermostat for this purpose?   If it needs a plug it won't be convenient enough.

Thanks heaps! 

Discussions

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Toga_Dan

3 years ago

2 mor options:

Test watr temp on inner wrist before fillin bag.

Or use an IR thermometer. They are almost immediate in giving a reading.

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Downunder35m

3 years ago

As Toga_Dan pointed out you can get mixer batteries for your shower and bath that allow for a quite good temperature selection.
I used one for years in my shower that would have driven me nuts otherwise.
There is also the option to use digitally controlled direct hot water systems which hold the selected temp within one or two degrees.
If you only look for something to warm up a bad of water it might be easiest to use heating mat with temperature control as used for reptile enclosures.
They are flexible enough to be put along the wall of polysterene cyclinder and waterproof.
So all you have to do is take a heat mat of suitable size, fit it into an insulated container that can hold your bag and power it up.
Be aware though that this is no method of quick heating, so you can't expect to put a liter of cold water in and 10 minutes later it is at 37°, just takes a bit of time.

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Toga_Dan

3 years ago

I think there is a shower valve which thermostatically mixes H and C water.