The primary, component of the SFD is a proprietary passive transducer
that responds to energy associated with subsurface stress.
The SFD is a quantum physics-based passive transducer
that responds to energy released by subsurface phenomenon under stress.
modular automation station 270 passive transducers
18 active transducers 0 - 10 v 500 potential-free permanent contacts normally open 300 local / remote feedbacks 500 error and operating messages 110 continuous outputs 0 - 10v 120 switching command outputs 24 - 250 vdc 18 counter inputs approximately 21000 lfdm wiring approximately 4800 lfdm carrier systems