KWJ Engineering, Inc. designs, manufactures, and supplies specialized gas detection instruments and systems worldwide. It offers ozone sensors for water treatment plants, water bottling plants, ultra pure water plants, aquariums, cooling towers, electric power plants, semiconductor manufacturing, and fruit/vegetable/meat storage; air treatment in offices, conference rooms, and casinos; and laundries in healthcare facilities and hotels. The company also provides volatile organic compound sensors for dry cleaners, woodworking shops, printers, filter verification, hospital sterilization, chemical operations, hazmat projects, and fumigations services; accessories, such as calibrators, data loggers, and alarms; and design, testing, and manufacturing services. In addition, it offers portable instruments, in-line and fixed monitors for CO and other gases, gas leak detection and arson investigation products, wireless sensor modules/networks, hand-held instruments, monitors and controllers, dissolved ozone hand-held and monitors, and UV precision analyzers for ozone.