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When my hot, water heater runs out of hot water, I have to wait a while until it's hot again. I'd like a way to check the temperature without running water to the faucet every 10 minutes.
Is it possible to put a temperature probe in the heater, and a display unit elsewhere?
(This specific unit is a propane-fired RV unit, with a 6 gallon tank, hence the running out. But I invite answers for regular house units as well.)
I don't see why not. In fact, all heaters I've seen are sold with a temperature probe on the inside and a display on the outside. I don't know why yours isn't. The problem is, of course, that you need to somehow get the probe on the inside - you must find a way, we don't know the construction of the heater.
The easiest thing to use (provided you can think of a way to insert the probe) would be a digital roasting thermometer.
The probe is stainless steel, so it won't rust in the water. It has a flexible connection to the processor/display unit. It has a limited temperature range, but 15°C to 100°C should be covered. The price is in the 20 - 30 Eur range. Maybe you can even put the "alarm when a temperature has been reached" into use, or get one of the radio models - they display the temperature on a second wireless display within a limited range, probably strong enough for another room. I don't know what the drain on the batteries will be during constant use, it might be a drawback. So try to get a mignon powered one instead of button cells.
