Msa Auer Gmbh

Auergesellschaft Gmbh

Axel Schubert

Dieter Lubkoll

Jurgen Coym

Michael Freidank

Described herein are arrangements and methods for achieving intrinsic safety for a radio transmission module. One aspect provides an apparatus for transmitting signals in an explosion-hazardous area with intrinsic safety, including: a radio transmission module having a high frequency module and an electronic control circuit disposed on a printed circuit board, said electronic control circuit being configured to control a voltage supply to the high frequency module in response to one or more of: output voltage of the high frequency module exceeding a predetermined voltage value, as independently measured by at least two independently operating hardware circuits; and a temperature of a heat-conducting potting compound potted over heat generating components disposed on the printed circuit board exceeding a predetermined temperature value, as independently sensed by at least two independently operating temperature circuits. Other embodiments are described.

Radio transmission modules having intrinsic safety

A direct current motor having a fixed stator coil module and a magnetic rotor that can be rotated around the perimeter of said module and forming an impeller at the same time. The coils, terminal and electric connecting lines as well as upstream motor control and voltage converter modules are embedded in a non-conductive casting compound. Power is supplied from an intrinsically safe accumulator or battery pack at a voltage that is still considered intrinsically safer using a higher current value to match the required motor output. The filter and blower unit can be used in zone '0' potentially explosive atmospheres.

Filter and blower unit for breathing masks or bonnets

An infrared sensor for gas metering appliances consisting of a metering chamber with an infrared source and an infrared sensor. The metering chamber is connected to the atmosphere via an anti-dust and anti-damp filter. The metering chamber is arranged in a protective housing having gas inlets and outlets. Connection to the metering chamber via a gas exchanger orifice and an anti-dust and anti-damp filter is not of a pressure-proof design based on normal pressure conditions. The infrared source and the infrared detector are integrated in the wall of the metering chamber and held therein. The infrared source is a lamp. The infrared source and infrared detector have a fail-safe power supply.

Infrared sensor with explosion-proof protection for gas metering appliances

A monitoring and warning system for firefighters and other people exposed to similar hazards includes mutiple monitoring, warning and control devices (through) and a telemetric module () for transmitting information data to a base station and for receiving commands. All units of the system are connected seperately to a common&#x2014;open-type or closed-type&#x2014;bus () and configured either for master-slave or for master-master operation. The system operates on simple and efficient connections, more units can be added easily, it is fast and faultless and can also be used in areas subject to explosion hazards.

Monitoring and warning system for individuals working under hazardous operating conditions

A warning device comprised of an electrochemical cell which detects the concentration of toxic gas that is passing through a housing holding the cell to a face mask. The cell produces a signal corresponding to the concentration level of toxic gas present. The signal is received by a threshold switch which is set to produce a signal only when a signal from the cell equals or exceeds a predetermined level. The signal from the threshold switch activates a visual signal means and acoustical signal means to indicate that a gas filter, connected to the warning device, is exhausted.

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Berlin, Germany

Axel Schubert