Industrial implementation, including pressure transmitters, temperature transmitters, flame failure detectors, resistance bulb transmitters, temperature recorders, A.C. current transmitters, A.C. voltage transmitters, adders, current to current devices, current alarms, deviation alarm, divider, flow transmitters, frequency to D.C. transmitters, millivolt alarm, millivolt transmitters, pneumatic to current transmitter, voltage alarm 1 - 5U, square root extractors, subtractor, intergrators, controllers, industrial burgular alarms, being goods included in this class