3 results about "Thermal fluctuations" patented technology

Some embodiments include a fire detector configured to capture a fire parameter and to output a fire alarm. An example comprises a housing with inlet openings and thermistors, in particular NTCs, arranged in the region of the inlet openings. The fire detector comprises a control unit connected to the thermistors for capturing temperature measurement signals. The control unit is configured for this if the (average) signal bandwidth of signal fluctuations in at least one of the captured temperature measurement signals, or in all the temperature measurement signals, falls below a value of 30 mK, in particular 20 mK, or 15 mK, for a minimum length of time. Reasons for the absence of thermal fluctuations may be contamination in the region of the inlet openings or because the inlet openings are covered by a protective hood or by an adhesive tape.

Provided are a continuous-flow magnetic field-assisted fermentation and catalytic synthesis device and method. The device includes a heat-insulating container, a magnetic field assembly, and a sample tube cavity. The magnetic field assembly is fixed inside the heat-insulating container； the heat-insulating container is of a closed structure with an inlet and an outlet, and a constant-temperature medium can be introduced and circulated in the heat-insulating container. The sample tube cavity penetrates through the magnetic field assembly, and a sample tube can all pass through the sample tube cavity. Fermentation liquid or a reaction medium continuously flows in the sample tube and is subjected to the magnetic field for the treatment； and an included angle between a direction of a magnetic field line of the magnetic field and a flowing direction of the fermentation liquid or reaction medium ranges from 0° to 90°. The continuous-flow magnetic field-assisted fermentation and catalytic synthesis device can implement continuous magnetic field-assisted treatment of the fermentation liquid or reaction medium in an external circulation state. The magnetic field assembly has a heat-dissipating structure, which is convenient for the constant-temperature medium to perform heat dissipation and temperature control thereon, thereby improving the operation stability and controllability of the device and ensuring that fermentation or reaction temperatures remain unaffected by thermal fluctuations generated by the magnetic field assembly.