A mesh network of temperature probes which measures the internal temperatures of compost piles and wirelessly transmits the temperature data to a computer; Air quality measurement apparatus, namely, particle counters; Electric control devices for heating and energy management; Electrical resistance heating wires and electrical controllers therefor; Electronic equipment, namely, electrolysis cell for use in the manufacture of various ionic solutions; Electronic monitors to collect operational data and settings, including temperature data and settings, from HVAC equipment to ensure proper functioning; Gas sensors for measuring gas concentration; Humidity sensor with integrated digital and analog output circuitry used in automotive, appliance and light industrial applications to sense both relative humidity and temperature environmental conditions; Lighting controls; Monitoring devices for the aquaculture industry used to monitor dissolved oxygen and temperature; Plug adaptors; Temperature switches and sensors for monitoring, controlling, and switching hydraulic or pneumatic systems; Valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines; Wireless controllers to remotely monitor and control the function and status of other electrical, electronic, and mechanical devices or systems, namely, remote metering systems, gas and liquid cylinders, vehicle tracking devices, energy and utility systems, security systems, and lighting systems; Wireless remote temperature and humidity monitors for building maintenance