Patent ID: 6952947
Filing Date: 2005-10-11
Classification: G01N

Abstract:
1. A measuring head for a device for measuring the concentration of a paramagnetic gas in a gas sample as a function of the change in the thermal conductivity of the paramagnetic gas in a variable magnetic field, the measuring head comprising: a first cylindrical housing part made of a steel alloy for accommodating a magnet coil body, said first cylindrical housing part extending concentrically around a central axis thereof; a second cylindrical housing part made of a steel alloy for accommodating another magnet coil body, said second cylindrical housing part extending concentrically around a central axis of each housing part; a first metallic cylindrical bar arranged in the area of the central axis of said first housing part for use as a magnet pole for the measuring head; a second metallic cylindrical bar arranged in the area of the central axis of said second housing part for use as a magnet pole for the measuring head, said first metallic cylindrical bar and said second metallic cylindrical bar being located at spaced locations with a defined air gap in the assembled state of the measuring head; a sample gas cuvette support provided in the air gap between the housing parts for positioning a sample gas cuvette holder, said sample gas cuvette support being provided with a gas inlet and gas outlet, wherein the sample gas cuvette support is formed by recesses for accommodating the sample gas cuvette holder in the magnet coil body.