9 Weighing apparatus and instruments; apparatus and instruments for weighing, measuring, signaling, automation, control and supervision, namely, portable computer programmed balancing instrument with electronic differential pressure gauge and micro computer program for measuring, signaling, control and checking of glow and differential pressure, computer hardware, computer operating system software, integrated circuits, and prerecorded software for measuring differential pressures, flow rates and temperatures of fluids within conduits, and parts therefor, all the afore-mentioned goods for use in heating, cooling, ventilation, water supply, temperature and moisture adjustment, lighting, power supply, air conditioning and security devices in buildings; room thermostats, temperature sensors with tensor of elasticity, liquid or vapor or bimetallic elements; time controls for controlling valves; transformers; rheostats