Barometers; ammeters; apparatus for testing gases; laboratory equipment and supplies, namely, calipers; electronic-based instruments for measuring environmental parameters including humidity; thermometers; voltmeters; microscopes; magnifying glasses; telescopes; periscopes; laboratory equipments, namely, test tubes, beakers, furnaces for laboratory experiments and laboratory furniture; weighing equipment, namely, scales and balances; detectors, namely, metal detectors, radar detectors, smoke ...