Specifications include, but are not limited to: Drager X-Pid 9500, P/N 6851848 - NO SUBSTITUTIONS - TO BE USED WITH EXISTING EQUIPMENT - SPECIFICATIONS: Portable phone based Bluetooth enabled Gas chromatograph/photo ionization detector to analyze for UST targeted organic compounds in the sub part-permillion concentration. Must have the following capabilities: 1. Two modes for efficient measurement strategy - - Must provide wide-range measurement for pre-testing and localizing measurement points. - Must allow selective measurement for monitoring specific toxic compounds quickly and effectively. 2. Windows-based management software for data logging and reporting requirements. 3. Sensor unit must maintain a constant temperature above the ambient air temperature and separate water vapor from the target compounds. 4. Mobile app - user-friendly mobile app installed on an explosion-proof smartphone. 5. Laboratory-quality measurement results based on gas chromatography (GC) and photoionization detection (PID) technologies. 6. Simple & quick functional test and calibration, guided through the user interface. 7. Reliable operation in environments that are unfavorable to normal laboratory equipment.