9 ELECTRICAL, ELECTROPNEUMATIC, AND MECHANICAL DEVICES, NAMELY, TEMPERATURE SENSORS, PRESSURE SENSORS, HUMIDITY SENSORS, TRANSDUCER INDICATORS, TEMPERATURE TRANSDUCERS, HUMIDITY TRANSDUCERS, TEMPERATURE AND HUMIDITY TRANSDUCERS, PRESSURE TRANSDUCERS,[ LIGHT TRANSDUCERS,] ELECTROPNEUMATIC TRANSDUCERS, TRISTATE SWITCHES, ROTARY ACTUATORS, PILOT RELAYS, POWER SUPPLIES, PRESSURE PROBES, AND THERMOWELLS, FOR USE IN INDUSTRIAL CONTROL SYSTEMS AND IN RESIDENTIAL AND COMMERCIAL HVAC SYSTEMS