looking for advice on my storage tank build

I used four of these on my setup.

https://www.grainger.com/product/TA...m/rp/s/is/image/Grainger/5XL18_AS01?$smthumb$

One for the top of each tank and one at roughly 20% up from the bottom of each tank. More measurements would be "neat" but in terms of adjusting how you're running your system all you really need to know is supply (top) and return (bottom) temps. I guess knowing what's going on in the middle will help you figure out how much more heat you have in there but after a few weeks of running you're going to have that figured out without the gauges...

I'm in the middle of installing my tank. I bought three of these http://www.ebay.com/itm/Red-LED-Dig...6991?pt=US_Weather_Meters&hash=item3f1bbf3b1f
Plan is to attach them to the outside of the tank and bury them under the insulation.

Hey KJ,

Depending on each person's goal there could be many ways to go. My goal is to monitor tank temperature status (for peace of mind) and as input for calculating pounds of wood required. Originally I used two of the Azel DS-60P units. They are powered by battery (CR2032-3 volt) or 24vac, and they have 2 sensors with 2 readouts. The wires can be extended to longer lengths. These worked pretty good using 4 sensors and 4 readouts. They are NOT illuminated but do have a maximum and minimum logging option for both sensors.

Over this summer, I put together a different setup using the Sure Electronics as easternbob linked to. For this I used 5 sensors and 5 readouts (illuminated). These are located at the bottom, 25%, 50%, 75% and the top. This is a bit more accurate due to the one additional sensor location, and the readouts are much more visible. From across the room where the laptop sits, the readouts are easily viewed and keyed into the formula for determining how many pounds to burn. The unit I went with comes with 2 sensors and is powered by a common wall wart, maybe 8vdc minimum. The wires can be extended just as the Azel. Went with the 2 sensor unit from parts-express.com, just to have spare sensors. Models ME-TM42123 (blue) and ME-TM41123 (red).

What exactly is that you have your Sures mounted in?

I still haven't got all mine up & going. Yet another unfinished project....

i have one sensor towards the bottom of one of my 500 gallon tanks. I had one on each tank at first to make sure they charge and discharge evenly. I have no problem running it off one sensor like that. I know how much energy is in the tanks over all by the psi. When that one sensor reads 120 - 130 F I know to fire the boiler or I may only have a warm shower in the near future. I don't even have a thermowell, I just taped a sensor to the tank and covered with insulation. I can look at the temp on the boiler and know how hot the water going into the tanks are. that is the temp at the top of your tank. Sure more gauges look nice, but it's really not a must. If I had the time, money and desire, I probably would have done top middle and bottom one one tank and top and bottom on the other.

maple1 said:

What exactly is that you have your Sures mounted in?

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This is a simple wood frame using 1/2" x 3" poplar, glued and screwed. Faceplate is from 1/16" sheet metal, cut to fit, add holes and paint.

kjahnz said:

I want to run this by some of you with storage as part of your heating system. In the pic I am showing one cold water port and two hot water ports connected with an elbow and a "T" that will continue to my boiler and a weighted check valve to my emitters. My question is will I draw off the top of both tanks or Will I only draw off the nearest tank? My goal is to draw heat off of both evenly. Thanks.

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It's all one tank until you get almost to the top, so nothing to worry about. Even if it was two separate tanks the buoyancy of the water in the far tank would even things out pretty well.

Two panels I put together using panel meters similar to those shown above which use DS18B20 sensors.