Master cylinder pressure of either or both of the primary and secondary braking circuits is sensed by a pressure sensor or sensors mounted in a manifold which is installed directly on a brake pressure modulator housing when the modulator is manufactured. The pressure sensors receive power and are grounded...http://www.google.fr/patents/US6443536?utm_source=gb-gplus-shareBrevet US6443536 - Brake pressure modulator with pressure sensor manifold
Brake pressure modulator with pressure sensor manifold