We are working on wireless inductive transfer charging pads and one of our goals is to measure temperature of Litz wire coil buried into the sand and concrete (so we cannot see the coil) during experimental tests (which is under high electromagnetic filed). We are just wandering if you can introduce a proper temperature sensor in order to measure temperature of electromagnetic pads(the maximum temperature is 130 degree).
Post by Lake Shore Ryan on Mar 12, 2018 17:29:33 GMT -5
Well, at that temperature range and accuracy level, you'd have a lot of different options. The problem you might run into for most of these sensors will be inductive pickup in your temperature measurement leads, since most of these rely on a generated voltage value to determine temperature. Our Model 372 combined with a platinum RTD might be a solution due to its balanced current source that can reject environmental noise. However, I worry that even the 372 might not be able to reject a signal large enough to accomplish inductive charging.
You might want to look for something based on fiber-optics that won’t be affected by the large EM field. I found the FOB100 from Omega. This might be a good place to start. It also has a smaller price tag than our Model 372.
If you can, let me know what you end up trying. I’m curious to know what solution you end up with.
Ryan Oliver Product Manager, Sensors and Instruments Lake Shore Cryotronics