Dräger Safety Ag&co. Kgaa

Mladen Schlichte

Matthias Martens

Wilfried Diekmann

Andreas Sürig

Björn Lange

Jürgen Osswald

Hans-Jürgen Bahs

Peter Tschuncky

Jürgen Unger

Markus Wansing

Volker Kuhn

Matthias Studer

Sebastian Schröter

Erik Stender

Martin Schrader

Tim Gnoerrlich

A heat tone sensor includes a housing with a gas inlet and with a gas outlet as well as a device for generating a gas stream of a gas to be tested between the gas inlet and the gas outlet. A measuring element, around and/or through which the gas stream flows, is configured to catalytically burn at least a portion of the gas stream and to send a measurement signal. The measurement signal indicates a quantity of heat released in the process.

Heat tone sensor as well as measuring element for a heat tone sensor

A gas sensor for detecting combustible gases is provided with a catalytic sensor element. The catalytic sensor element is arranged in a housing () surrounding the catalytic sensor element on all sides. The housing has a gas-permeable inlet opening. The gas sensor has electric lines, which are in connection with the sensor element and have terminals located outside of the housing (). The housing has a gas-permeable inlet opening () and a gas-permeable outlet opening () and a flow channel () connecting the gas-permeable inlet opening () and the gas-permeable outlet opening (). The sensor element is arranged in the flow channel.

Gas sensor

An explosion-proof sensor for detecting combustible gases is provided with a glass seal () for establishing an electrically conductive connection with the interior of the housing. The sensor is improved in terms of the pressure resistance of the housing. The glass seal () has a bending-resistant casting compound () mechanically stabilizing the glass seal () on at least one side.

Explosion-proof sensor

A gas sensor is provided for use in a hazardous explosive atmosphere present continuously or for a long time. The gas sensor is not provided with a pressure-proof housing and is provided with at least one catalytic or semiconductor measuring element () in a hollow body () defining the measuring element () against the environment. The hollow body has breathing openings () and wherein the ratio of the area of the breathing openings to the total area of the hollow body equals, furthermore, at most 0.8 or the hollow body is porous with a porous hollow body material having a pore size according to ISO 4003 equal to at most 2 mm.

Explosion-proof gas sensor without pressure-proof housing

A test adapter for the saturated vapor calibration of gas-measuring devices. The test adapter () has, in an adapter housing (), a peripheral edge () for receiving a gas-measuring device and has a depression () for receiving the sample liquid in the area of the gas-sensitive surface of the gas-measuring device.

Test adapter for a gas-measuring device

A circuit with at least one catalytic measuring element (), in which the at least one catalytic measuring element () is connected to a supply voltage () without a protective resistor and without a thermal safety device arranged upstream. The circuit makes it possible to develop gas-measuring devices with catalytic measuring elements that are characterized by an especially low power consumption.

Circuit with at least one catalytic measuring element

A gas sensor has shock resistance and temperature resistance attributes. The gas sensor includes at least one catalytic measuring element (), which is arranged in a sensor housing () forming a combustion chamber (). The sensor housing () has at least one gas-permeable housing opening () for the gas exchange between the environment and the combustion chamber (). The catalytic measuring element () is arranged between at least two disk-shaped support elements () made of a heat-insulating and temperature-resistant material.

Gas sensor with at least one catalytic measuring element

A process is provided for measuring a gas concentration with at least one thermal measuring element. The thermal measuring element is operated by pulses. A measured value of the gas concentration in the environment of the measuring element is obtained from the evaluation of the response of the measuring element to at least one single pulse by determining transient states of the thermal measuring element. From this the measured value of the gas concentration in the environment of the measuring element can be derived, during the imposed pulse based on electric measured variables.

Process for measuring the concentration of gases

A gas sensor () has a pressure-tight sensor housing (). The sensor housing () has a metal plate () at its lower end and the metal plate () has breakthroughs (). Metal pins () electrically contact the sensor elements () and these metal pins are brought to the outside via glass inserts ().

Growing community of inventors

Lübeck, Germany

Mladen Schlichte