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I've been working with Dow Corning recently for an adhesive that will bond silicone rubber to a painted surface. They quickly provided good suggestions and answered my follow up questions quickly. http://www.dowcorning.com/content/support/contact_us.aspx --Bob

I'm the OP, and I appreciate the help you have all provided. The confirmation that the sensors/transmitter will fit in the available space allows me to focus on some other details of the design. And, it's good to know that a single RF channel will suffice. Thanks! --Bob

Not being a circuit designer, I don't know if the following is possible: I want to have a circuit board that has two sensors - temperatue and barometric pressure - and an RF transmitter in the 300-400 MHz range to send the temp and press data to a receiver up to 20 feet away. The board must fit...

Thanks IRstuff. My problem was the air density was wrong. At 0F the AirDensity = 0.0807 lbm/ft3. I appreciate your help!

I am not a student. I earned a BSME 31 years ago, but I have not really practiced engineering for years. I've been doing mostly business software development during my career. I am working on a personal project and dusting off my engineering math skills. I need to calculate the approximate...