IoT Pressure Differential Monitor for Air-cooled condensors

Each year food retailers and domestic air-conditioning users spend millions of dollars cleaning air-cooled condensers. Some of these condensors require more frequent servicing, some less frequent servicing. There is currently no solution available to accurately calculate the ideal cleaning time.
I have written a specification for a device aimed at identifying when we should be cleaning condensors. Thank you for taking the time to read through my proposal. After you have read through it, you will probably have some questions. Please feel free to ask as many questions as you need to, I will do my best to answer them.
I am looking for a Freelancer that can help translate my idea into a reality. Thank you.