Imperialism in the U.S. Essay ... DBQ 15 Imperialism is the policy of extending the role of authority of a nation over a foreign country, usually in material gain, Military expansion and Economical reasons. In the late 1800âs and early 1900âs, the United States went through an era of imperialism.
Portable gas detector. A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. This type of equipment is used to detect a gas leak or other emissions and can interface with a control system so a process can be automatically shut down.
1 As an investigative tool, SENSITÂ® GOLD LEL sensor is designed to find the source of combustible gas leaks fast.  SENSITÂ® GOLD combustible gas leak detector and multi-gas monitor in one user-friendly instrument. As an investigative tool, SENSITÂ® GOLD LEL sensor is designed to find the source of combustible gas leaks fast.