9 Air quality measurement apparatus, namely, particle counters; Climate control systems consisting of digital thermostats for cooling equipment, and a programmable logic controller (PLC) with input and output features for temperature and humidity, which works with a remote digital read out controller; Climate control systems consisting of digital thermostats, air conditioning, heating, ventilation and drying control devices; Electrical switches; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Electronic motor switches for switching off motors; Temperature controller for controlling temperature of medical instruments and containers for medical fluids; Temperature controllers for warming and cooling medical and surgical liquids, equipment and instruments; Temperature controllers for indicate use; Thermostats