Alarm sensors; An optical metrology inspection system comprised of a light source, one or more cameras and sensors in communication with computer software and hardware; Day and night vision systems primarily comprising day and night sensors, day and night cameras, power sources, communication means, monitors and operating software; Electric or electronic sensors for climate and feed handling; Electric sensors; Electric, electronic, or electrochemical oxygen monitors and sensors for environmental use; Electronic proximity sensors and switches; 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; Light systems comprising light sensors and switches; Liquid level sensors; Optical sensors; Proximity sensors; Sensors for determining position, velocity, acceleration and temperature; Sensors for the determination of temperatures, positions and distances