There's 2 Canadian companies that make/offer electronic sprayer tank gauges for JD sprayers. Visited both of them @ Louisville. See links below. They both use a transducer at the bottom of the tank to measure the weight (pressure) in the tank, equating to tank level in % or gallons. 

Yes, it requires 1x calibration w/water, then enter factors for other products, which usually only means UAN.

Does anyone have experience with either one of the companies re. their electronic gauge? Email (see profile) works if you'd rather.

Thanks

Simon Innovations "Accu-Volume"#mce_temp_url#

Custom Ag Concepts, Insight System Electronic gauge#mce_temp_url#