Measuring head for a device for measuring the concentration of at least one gas in a gas sample

摘要

A measurement head is provided for a device for measuring the concentration of at least one gas, in particular oxygen. A gas sample a measurement element (1) is arranged in the region of an opening on a circuit board (11). To convey gas a duct (16, 17) is formed in each of two metal bodies, which surround the measurement element (1) and serve as magnetic poles. During operation of the measurement head the gas sample flows substantially perpendicularly, first through one of the metal bodies (12, 13), and then through the opening (18) on a side of the measurement element (1) facing the opening and emerges again through the other metal body (14, 15).

主权项

1. A measuring head for a device for measuring the concentration of at least one gas in a gas sample, the measuring head comprising:
a measuring element with at least one measurement point for detecting a change in thermal conductivity of the gas sample; a plate carrying the measuring element on a first side of the plate; electric lines connected to the plate and connected to the measuring element; a first metal body arranged above the measuring element; and a second metal body arranged under the measuring element under a second side of the plate, wherein the first metal body and the second metal body form magnetic poles during the operation of the measuring head, wherein a duct is formed in each of the first metal body and the second metal body and an opening is formed in the plate for routing the gas, whereby the gas sample can flow through one of the metal bodies and through the opening on a side of the measuring element facing the opening and emerge again through the other metal body during the operation of the measuring head.