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Here is a instructable to waterproof a LM35 for use on a tethered ROV using a automobile 12V battery as a power source. This came out of a need for t...
I used cat-5 cable for the sensor as it will shield the sensor signals on the twisted pair (and I had a spool sitting around.) It will also easily at...
Before soldering, I added short lengths of heat-shrink tubing wrap to the conductors, and two larger ones over the cat-5. Then, I soldered the LM35 t...
I used 1/4 inch O.D. copper tubing (the kind for an automatic ice maker for your refrigerator) to make a small copper cover for the LM35. I was abl...
At this point, the sensor is fully operational in the air, but it is not waterproof. I decided to give it a quick test to make sure everything still ...
I wanted to have the sensor on a probe so it would stick out forward of the ROV a little. Here I'm building the cap out of 1/2 inch copper pipe and c...
The copper cap was hammered into 1/2 inch PVC pipe to make the probe. Then, I used aquarium, silicone sealant to seal the gaps as I pushed the sensor...
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you convert mV to V by dividing mV by 1000. which would give us .0167V.
the LM35 is .01V/C, so we then divide our .0167V by the .01 and we get 1.67V/C then you can convert to F from there.