I have application for an analogue to digital converter (ADC) in a noisy environment, so a possible solution is to place an ADC module very close to the analogue sensors and use some form of digital connection back to a microcontroller. A possible protocol is I2C, and has the advantage that several ADC modules can be attached to the same bus, along with other peripherals Eg LCD.
The above ADS1115 modules have four input channels, 16 bit conversion, flexible input mux, and were available on eBay for less than A$4, so worth a try.
Continue reading ADS1115 ADC checkout – #1