Gas detection systems include Fixed & Portable Gas Detectors, Gas Monitors with Alarm System, Gas Analyzers & Wireless Gas Detectors. VOC Gas Generators or VOC Gas Detectors or PID Detectors use optical ionization sensing (PID) technology to detect Volatile Organic Compound (VOC) gases. Allows leak detection of metal dioxide toxic gas CH3Cl CH2Cl2 CHCl3 CH3l CH2l2 CHl3 CH3F CH2F2 CHF3 CH3Br CH2Br2 CHBr3. Toxic gases O2, CO, H2S, H2, Cl2, SO2 and other harmful gases