Our company conveniently located in San Francisco, USA, where world hi-tech capital Silicon Valley is. We've been carrying U. S. original electronic instruments for testing and detecting purpose over a decade. We're proudly stand firm upon our professional position wiht highest qualities and lateset technologies that only can be found in this country. See what we have:-----Gas Leak Detector in series, both multiple gas detecting up to 15 different type of gases and single gas detecting type available;-----Air Quality Monitor in series, these personal operatable devices can monitoring hazardous gases in the air for both industrial detecting and environmental monitoring purpose;-----Construction & Civil Engineering Instruments in series; concrete tester, rebar locator & corrosion detector, ultrasonic building material inspector and much more, mostly made in Swiss with uncompromisable high quality and manufacturing heritage;-----Underground Pipe Locator & Pipe Inside Inspector with Camera;-----Radar/Laser Detector;-----Variety of Environmental Instrument such as water tester, sound meter, radiation detector, light meter and more.Our products are all portable even single hand operatable, fully electronic /digital component/technology equipped, fully feature built-in, and strong functions as an essential.Our products are stocked in USA, most effective shipping service is always available. Ask for details.