PHOTO-IONISATION DETECTOR FOR GAS ANALYSERS Russian patent published in 2014 - IPC G01N27/64 

FIELD: instrumentation.

SUBSTANCE: proposed detector comprises UV lamp with flat outlet opening. Flow-through chamber is arranged above said opening and composed by two disc electrodes. These are arranged one above the other and made of metals with different work function and separated by ring-like fluoroplastic washer. Besides, it comprises electrometer whereto connected are electrodes and signal detector registrator connected to electrometer output. Lower electrode has central bore while upper electrode has analysed gas flow intake channel. In compliance with this invention, said detector incorporates extra flat heater arranged at upper electrode for heat contact therewith. Cylinder made of heat-insulating dielectric material is arranged between lower electrode and lamp flat outlet opening so that cylinder mirror axis is aligned with that of flow-through chamber. Said cylinder has central bore and analysed gas discharge flow communicated with said opening. Note here that upper electrode bottom surface is coated with palladium-bearing material.

EFFECT: higher precision.

2 cl, 1 dwg