I was finally able to aquire a hall-effect sensor for my 500gal propane tank. I found many very expensive $600++ wireless setups, but finally I found the $30 sensor they all use. This was no easy task! I talked to the manufacture, manufacture rep, wireless equipment company, and finally the supplier that they use to get the actually sensor from. The sensor has what is referred to as a "radiometric" output. It has a 5vdc input and the output values are proportional to the tank level percentage. Take a quick look at the pdf:
http://www.rochestergauges.com/Pages/PDFs/R3D.pdf
One caution I noticed that you should only apply the +5v for a few seconds, otherwise it will heat up the circuit board and cause errors.
So what I need to do is:
Generate a 5v signal only for a few seconds on a preset "tank check" interval. I am thinking every 30min, but this could be a variable that changes. I want to make sure I have some type of resistor or something in place to make sure I don't overload the input current limit of 4.5ma. I then need to have an input read the voltage from the output of the sensor and corrolate that to a percentage. I would like to have this voltage level and percentage show up as two seperate status items in homeseer.
I have the Ocelot and SECU-16 module.
http://www.rochestergauges.com/Pages/PDFs/R3D.pdf
One caution I noticed that you should only apply the +5v for a few seconds, otherwise it will heat up the circuit board and cause errors.
So what I need to do is:
Generate a 5v signal only for a few seconds on a preset "tank check" interval. I am thinking every 30min, but this could be a variable that changes. I want to make sure I have some type of resistor or something in place to make sure I don't overload the input current limit of 4.5ma. I then need to have an input read the voltage from the output of the sensor and corrolate that to a percentage. I would like to have this voltage level and percentage show up as two seperate status items in homeseer.
I have the Ocelot and SECU-16 module.
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