electrical and electronic apparatus and instruments for industrial use, for measuring, signalling, checking and supervision, namely, industrial electrical equipment for heat tracing; electrical and electronic equipment for industrial refrigeration; cabinets specially adapted to hold and protect electrical equipment, cables and wiring and distribution boards for electricity; electrical indicator boards; switch boxes for electricity; electrical switches, namely, level switches for monitoring and controlling water and fluids; heat regulating apparatus in the nature of electric heat sequencers, electric relays and electric transformers, transmitters of electronic signals, illuminated mechanical signs and signals, electricity conduits and related materials, namely, electrical wires and cables, electric heating cables, sheaths for electric cables; Thermometers not for medical purposes, Thermostats, Temperature indicators and Electronic temperature recording devices in the nature of temperature meters not for medical use, temperature sensing probes and parts for temperature control devices, namely, temperature sensors and electronic controls; smoke detectors, Warning alarms in the nature of warning bells and fire alarms