fluid/pressure based sensors are not new - maxbrake is the last to the party.
brakesmart has been around for significantly longer -
Dr Performance Brakesmart Brake Controller
ford was the 1st manufacture to include a fluid/pressure based trailer brake system as an option on a truck (2005) - theyve gotten RAVE reviews for it - strangely enough.
these cheap electric "progressive" (laughable) controllers like Tekonsha's Prodigy and others are garbage compared to TRUE progressive controllers like maxbrake, brakesmart and the ford OE system.
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Don R.
'04 Haulmark (M42386) 42', 2 slide, 10kw -
Pictures
'04 F350 CrewCab Longbed 4x4, 50g aux tank & gear vendors dbl over