公开(公告)号：US3812362A

公开(公告)日：1974-05-21

申请号：US37601173

申请日：1973-07-02

Applicant: HONEYWELL INC

Inventor： LARSEN L ,  KOBEK E

IPC: G01T7/12 ,  G08B17/11 ,  G01T1/24

CPC classification number: G01T7/125 ,  G08B17/11

Abstract: A combustion products detector system of the type having at least one ionization chamber, the combustion products sensing ionization chamber being open or accessible to the surrounding air. The output signal voltage from the chamber is connected through an FET to a four terminal voltage comparator switch, which four terminal switch has an easily adjustable threshold voltage.