MEASURING EQUIPMENT FOR DETERMINING THE COMBUSTIBLE GAS CONTENT OF THE AIR

摘要

The device has a measurement chamber with two incandescent filaments, one of which is coated with a catalyst, while the other has a neutral surface. Control circuits and a differential amplifier are provided. The incandescent filament (C1) with catalytic surface is connected to the output of a control circuit (G1), and the other filament to the output of another control circuit (G2). Temperature sensors (E1, E2) on the filaments are connected to the inputs of their respective control circuits (G1, G2). Outputs of the two control circuits (G1, G2) are connected to potentiometers (P1, P2) and to the inverting and non-inverting inputs of the differential amplifier (E).