Abstract: The invention relates to a gas sensor (34) and a method for detecting gas in a test space (37) of a test chamber for conditioning air, in particular a temperature control chamber, a climate chamber or the like, and to a test chamber, the gas sensor having a sensor head (35) configured to be brought into contact with an atmosphere of the test space. The gas sensor is configured to detect a gas, in particular a refrigerant and/or a hydrocarbon, in the test space, the gas sensor having a transport tube (36) configured to transport a measuring gas from the test space to the sensor head.

Abstract: A test chamber and a method for conditioning air in which the test chamber comprises a temperature-insulated test space, which is closable to an environment and serves to receive test material, and a temperature control device for controlling the test space in temperature, a temperature ranging from ?40 ° C. to +180 ° C. being generable within the test space by the temperature control device. The temperature control device comprises a cooling apparatus having a first and second cooling cycle, the first cooling cycle having a first refrigerant, a first heat exchanger, a first compressor, a first condenser and a first expansion element, the first refrigerant being a hydrocarbon or a refrigerant mixture made of hydrocarbons. The second cooling cycle has a heat transfer medium, a second heat exchanger in the test space and a pump, the second cooling cycle being coupled to the first cooling cycle by the first heat exchanger.

Abstract: The invention relates to a test chamber and to a method for operating a test chamber for conditioning air, in particular a temperature control chamber, a climate chamber or the like, the test chamber comprising a temperature-insulated test space, which can be sealed from an environment and serves to hold test material, and a temperature control device for controlling the temperature of the test space, the temperature control device being configured to establish a temperature in a temperature range of ?50° C. to +180° C. within the test space, the temperature control device having a heating feature and a cooling feature with a cooling circuit with a refrigerant, a heat exchanger in the test space, a compressor, a condenser and an expansion member, the refrigerant being a hydrocarbon or a refrigerant mixture of hydrocarbons, the test chamber being provided with a machine room physically separated from the test space, the cooling circuit with the compressor being at least partially disposed in the machine room.