Patent ID: 6119532
Filing Date: 2000-09-19
Classification: G01N

Abstract:
An apparatus for sampling particles, comprising:a sampling line sequentially including a sampling port, a sampling air valve, a particle sampler and an isolation valve;a pumping line connected between the isolation valve and a pump;a discharge line connected between the pump and a discharge port;a purge line sequentially including a purge gas source, a purge air valve, and a divergence end;a purge-sampler line connecting the divergence end to the sampling line between the sampling air valve and the particle sampler, and including a purge-sampler air valve;a purge-pump line connecting the divergence end to the pumping line, and including a purge-pump air valve;an isolation valve bypass line connected at one end to the sampling line between the particle sampler and the isolation valve, connected at the other end to the pumping line between the isolation valve and the purge-pump line, and including a bypass air valve; anda control unit for controlling the operation of the isolation valve, the pump, the sampling air valve, the purge air valve, the purge-sampler air valve, the purge-pump air valve, and the bypass air valve.