Monitoring system

A monitoring system comprising:

• a sample subsystem including a sample line having first and second ends, the first end being disposed in an area or adjacent an object to be monitored, a gas probe assembly in fluid communication with the first end of the sample line, a sample pump mounted in the sample line intermediate the first and second ends, a first sample pressure detector in fluid communication with the sample line intermediate the sample pump and the second end, a second sample pressure detector in fluid communication with the sample line intermediate the first end and the sample pump;
• a dilution subsystem including a dilution line having first and second ends, the first end being vented to atmosphere, a dilution pump mounted in the dilution line intermediate the first and second ends, and a dilution pressure detector in fluid communication with the dilution line intermediate the dilution pump and the second end;
• and
• a test subsystem including a test line having first and second ends, the first end being in fluid communication with the second end of the sample line and the second end of the dilution line, and at least one gas sensor in fluid communication with the test line.

A monitoring system comprising:

• a sample subsystem including a sample line having first and second ends, the first end being disposed in an area or adjacent an object to be monitored, a gas probe assembly in fluid communication with the first end of the sample line, a sample pump mounted in the sample line intermediate the first and second ends, and a first sample pressure detector in fluid communication with the sample line intermediate the sample pump and the second end;
• a dilution subsystem including a dilution line having first and second ends, the first end being vented to atmosphere, a dilution pump mounted in the dilution line intermediate the first and second ends, and a dilution pressure detector in fluid communication with the dilution line intermediate the dilution pump and the second end;
• and
• a test subsystem including a test line having first and second ends, the first end being in fluid communication with the second end of the sample line and the second end of the dilution line, and an electrochemical toxic gas sensor in fluid communication with the test line.