PHOTO-IONIZATION DETECTOR FOR GAS-ANALYSIS EQUIPMENT Russian patent published in 2005 - IPC

FIELD: instrument-making industry.

SUBSTANCE: detector has ultraviolet lamp with port for outputting ultraviolet radiation and ionization chamber. Inner volume of chamber is limited by space between surface of ultraviolet lamp port and surface of cylindrical bushing of electric-isolation material, having central inner channel. In the channel polarizing and collecting electrodes are mounted. Electrodes are made in form of rods. Outer surface of rods excluding ends, placed near end surface of bushing, is covered by layer of electric isolation material. Lamp on the side of port for outputting ultraviolet radiation is provided with cylindrical metallic cap. In middle portion of cap inner ring shelf is present, one surface of which is pressed to edges of lamp port, and another surface contacts end surface of bushing. Bushing is made of elastic polymer material and is screwed into hollow of cap, remote from lamp port.

EFFECT: higher efficiency.

4 cl, 3 dwg