If you are eligible a system licensed by the FCC may be your best selection. Non-licensed frequencies are also available, however the equipment cost is higher. Radio communication is often simple and straight forward, however it may become complex and require a system study. Contact me, Brent Hazelwood, for a free evaluation. The Analog Input Signal indicates the value of a function being measured.
Some examples are pressures, liquid level, power etc.
A typical Transducer might output 4 mA for zero pressure and 20 mA for 500 lbs.