Fluorescence Spectrometer

Abstract

The present invention relates to a fluorescence spectrometer, and belongs to the technical field of trace explosive detection. The fluorescence spectrometer includes a semiconductor refrigerator and a spectrometer insulation shell. A heat-conducting block is embedded in the bottom of the spectrometer insulation shell. The bottom of the heat-conducting block is fixedly connected to the semiconductor refrigerator. Two placement channels that penetrate the spectrometer insulation shell are arranged inside the spectrometer insulation shell. Sensitive devices are arranged in the two placement channels. One end of the sensitive device extends into the corresponding placement channel, and passes through the heat-conducting block and the spectrometer insulation shell in turn, and is connected to an air suction component used to absorb the substance to be tested in the sampling bottle, and the other end is connected to the sampling bottle. Beneficial effects: The air suction component adsorbs the substance to be tested into the sensitive device, and the semiconductor refrigerator can be used to quickly heat or cool the sensitive device. Multiple transmitting optical fibers and detection optical fibers are arranged to detect fluorescence at different parts of the sensitive device.

Description

Technical Field

[0001] The invention belongs to the technical field of fluorescent trace explosive detection, and in particular relates to a fluorescence spectrometer. Background Art

[0002] The fluorescent trace explosive detector is a detection device that integrates mechanics, electronics, chemistry, and optics. Its main working principle is: after obtaining the trace explosive of the detection object through suction or sampling bottle, the air pump draws the detected substance into the sensitive device through the air inlet nozzle. The detected substance encounters the coating material and then undergoes a quenching reaction through fluorescent irradiation, so that it is detected by the optical sensor and the signal is transmitted to the circuit board for sound and light alarm.

[0003] Since the fluorescence quenching reaction of the sensitive device is different at different temperature states, the fluorescence in different parts of the sensitive device is also different. In order to study these factors, it is necessary to quickly heat and cool the sensitive device and adjust the position of the detection optical fiber.

[0004] Therefore, a fluorescence spectrometer is proposed to solve the deficiencies in the prior art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a fluorescence spectrometer. The air suction component adsorbs the substance to be tested into the sensitive device. The sensitive device can be quickly heated or cooled by a semiconductor refrigerator. Multiple transmitting optical fibers and detection optical fibers are set to detect fluorescence at different parts of the sensitive device.

[0006] The technical solution of the present invention for solving the above technical problems is as follows: the fluorescence spectrometer includes a semiconductor refrigerator and a spectrometer insulation shell, a heat-conducting block is embedded in the bottom of the spectrometer insulation shell, the bottom of the heat-conducting block is fixedly connected to the semiconductor refrigerator, two placement channels penetrating the spectrometer insulation shell are arranged in the spectrometer insulation shell, and sensitive devices are arranged in the two placement channels, one end of the sensitive device extends into the corresponding placement channel, and after passing through the heat-conducting block and the spectrometer insulation shell in turn, it is connected to the suction component for absorbing the substance to be tested in the sampling bottle, and the other end is connected to the sampling bottle, a plurality of emitting light optical fibers are arranged at intervals on the top of the spectrometer insulation shell along the length direction of the spectrometer insulation shell, and a plurality of detection optical fibers are arranged at intervals on the opposite sides of the spectrometer insulation shell along the length direction of the spectrometer insulation shell, and the probes of the plurality of emitting light optical fibers and the plurality of detection optical fibers can detect the interior of the corresponding placement channels.

[0007] Beneficial effects: The suction component absorbs the substance to be tested into the sensitive device, and the sensitive device can be quickly heated or cooled by using a semiconductor refrigerator. Multiple transmitting optical fibers and detection optical fibers are set up to detect fluorescence at different parts of the sensitive device.

[0008] Furthermore, the air suction component includes an air pump, a main air pipe, a three-way joint and a bronchus, the output end of the air pump is connected to one end of the main air pipe, the other end of the main air pipe is connected to the two bronchi through the three-way joint, and the two bronchi are respectively connected to the corresponding placement channels.

[0009] The beneficial effect of adopting the above further scheme is that the air pump adsorbs the substance to be detected in the sampling bottle into the sensitive device through the air pipe, thereby promoting the reaction, having good sealing performance and high working efficiency.

[0010] Furthermore, the two bronchi are connected to the corresponding placement channels through a first pneumatic joint.

[0011] The beneficial effects of adopting the above further solution are: good sealing, easy connection, and accurate detection data.

[0012] Furthermore, it also includes a first adjustment component for adjusting the position of the emitting light optical fiber and a second adjustment component for adjusting the position of the detecting optical fiber.

[0013] The beneficial effects of adopting the above further scheme are: by adjusting the components to detect and receive different parts of the sensitive device, the research needs are met, the operation is convenient, and the detection data is highly accurate.

[0014] Further, the first adjustment component includes an X-direction hand screw and a first Y-direction hand screw, and the number of the X-direction hand screw and the first Y-direction hand screw is multiple groups, and the X-direction hand screw and the first Y-direction hand screw of each group correspond to one of the emitting optical fibers, and the X-direction hand screw and the first Y-direction hand screw are both threadedly connected to the heat preservation shell of the spectrometer corresponding to the position of the emitting optical fiber, and a first through hole is provided on the top of the heat preservation shell of the spectrometer corresponding to the vertical lower part of the emitting optical fiber, and the through hole is connected to the placement channel; the second adjustment component includes a Z-direction hand screw and a second Y-direction hand screw, and the number of the Z-direction hand screw and the second Y-direction hand screw is multiple groups, and the Z-direction hand screw and the second Y-direction hand screw of each group correspond to one of the detection optical fibers, and the Z-direction hand screw and the second Y-direction hand screw are both threadedly connected to the corresponding On the insulation shell of the spectrometer for detecting the position of the optical fiber, a second through hole is provided on the side wall of the insulation shell of the spectrometer corresponding to the detection optical fiber, and the second through hole is connected to the placement channel; two adjacent first through holes and two adjacent second through holes are each provided with a W-shaped elastic member, and the two ends of the elastic member in the two first through holes are respectively embedded in the two first through holes, and the two ends of the elastic member in the two second through holes are respectively embedded in the two second through holes, and the probe of the emitting optical fiber is inserted into the corresponding first through hole, and the position of the probe of the emitting optical fiber is adjusted by the cooperation of the X-direction hand screw, the Y-direction first hand screw and the corresponding elastic member, and the probe of the detection optical fiber is inserted into the corresponding second through hole, and the position of the probe of the detection optical fiber is adjusted by the cooperation of the Z-direction hand screw, the Y-direction second hand screw and the corresponding elastic member.

[0015] The beneficial effect of adopting the above further scheme is: by tightening the X-direction hand screw, the first Y-direction hand screw and the elastic member, the position of the emitting optical fiber in the X and Y directions is adjusted; by loosening the X-direction hand screw and the first Y-direction hand screw, the probe of the emitting optical fiber is manually adjusted in the Z direction; by tightening the Z-direction hand screw, the second Y-direction hand screw and the elastic member, the position of the emitting optical fiber in the Z and Y directions is adjusted; by loosening the Z-direction hand screw and the second Y-direction hand screw, the probe of the emitting optical fiber is manually adjusted in the X direction.

[0016] Furthermore, the elastic member is a reset spring, the reset spring abuts against one side of the probe of the emitting optical fiber, and the X-direction hand screw and the first Y-direction hand screw abut against the other side of the probe of the emitting optical fiber.

[0017] The beneficial effects of adopting the above further solution are: simple structure, and utilizing the elastic deformation of the reset spring to abut the probe through the X-direction hand screw and the Y-direction first hand screw to fine-tune the position of the probe.

[0018] Furthermore, a temperature sensor is provided in the heat conducting block.

[0019] The beneficial effect of adopting the above further solution is that it is convenient to monitor the heating or cooling temperature in real time and to remind the staff to make timely adjustments.

[0020] Furthermore, a heating plate is provided in the heat conducting block.

[0021] The beneficial effects of adopting the above further solution are: fast heating with a semiconductor refrigerator facilitates temperature detection needs, improves work efficiency and saves labor costs.

[0022] Furthermore, the sensitive device is connected to the sampling bottle via a flange cover, and the flange cover is provided with a vent hole for preventing the sampling bottle from forming a negative pressure.

[0023] The beneficial effects of adopting the above further solution are: good fixing effect and easy assembly and disassembly.

[0024] Furthermore, a second pneumatic joint for connecting the sampling bottle and the sensitive device is provided in the flange cover, and an O-ring for fixing the sensitive device is provided in the flange cover and on the first pneumatic joint.

[0025] The beneficial effect of adopting the above further solution is that the sensitive device is fully fixed and effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 for Figure 1 Bottom view of

[0028] Figure 3 for Figure 1 Left view of;

[0029] Figure 4 for Figure 1 A front view of

[0030] Figure 5 for Figure 4 AA section view;

[0031] Figure 6 for Figure 1 A top view of

[0032] Figure 7 for Figure 6 BB cross-sectional view;

[0033] Figure 8 for Figure 6 CC section view;

[0034] Fig. 9 for Figure 5 An enlarged view of a;

[0035] Fig.10 for Figure 5 DD cross-sectional view;

[0036] Fig.11 It is a structural schematic diagram of the light flange cover;

[0037] Fig.12 This is a schematic diagram of the installation of the spectrometer and the sampling piece;

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1. Semiconductor refrigerator; 2. Air pump; 3. Main air pipe; 4. Three-way connector; 5. Bronchus; 6. Pneumatic connector; 7. Transmitting optical fiber; 8. Spectrometer insulation shell; 9. Detection optical fiber; 10. Hand screw in X direction; 11. First hand screw in Y direction; 12. Second hand screw in Y direction; 13. Hand screw in Z direction; 14. Second pneumatic connector; 15. Sensitive device; 16. Heat transfer block; 17. O-ring; 18. Heating plate; 19. Reset spring; 20. Sampling bottle; 21. Temperature sensor; 22. Flange cover. DETAILED DESCRIPTION

[0040] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0041] Since both the spectrometer module and sensitive devices of the trace explosive detector need to be tested, and because the sensitive devices need to be installed in the spectrometer module, if the detection tooling is made separately, there are many types of tooling, high costs, and low detection efficiency. Some automated structural detection is needed to improve detection accuracy and work efficiency.

[0042] Example 1

[0043] like Figure 1-10As shown, this embodiment provides a fluorescence spectrometer, including: a semiconductor refrigerator 1 and a spectrometer insulation shell 8. The material of the spectrometer insulation shell 8 is polystyrene, which has low thermal conductivity and is easy to process. A heat-conducting block 16 is embedded in the bottom of the spectrometer insulation shell 8. The material of the heat-conducting block 16 is copper, which has good thermal conductivity. The bottom of the heat-conducting block 16 is fixedly connected to the semiconductor refrigerator 1 by screws, and two placement channels penetrating the spectrometer insulation shell 8 are arranged in the spectrometer insulation shell 8, and sensitive devices 15 are arranged in the two placement channels. One end of the sensitive device 15 extends into the corresponding placement channel, and passes through the heat-conducting block 16 and the spectrometer insulation shell 8 in turn, and is connected to the suction component for absorbing the substance to be tested in the sampling bottle 20, and the other end is connected to the sampling bottle 20. A plurality of emitting optical fibers 7 are arranged at intervals on the top of the spectrometer insulation shell 8 along the length direction of the spectrometer insulation shell 8, and a plurality of detection optical fibers 9 are arranged at intervals on the opposite sides of the spectrometer insulation shell 8 along the length direction of the spectrometer insulation shell 8, and the probes of the plurality of emitting optical fibers 7 and the plurality of detection optical fibers 9 can detect the interior of the corresponding placement channels.

[0044] The suction component adsorbs the substance to be tested into the sensitive device 15, and the semiconductor refrigerator 1 can be used to quickly heat or cool the sensitive device. The model of the semiconductor refrigerator 1 is TEC3-22908, which uses the Peltier effect. Multiple transmitting optical fibers 7 and detection optical fibers 9 are set to detect fluorescence at different parts of the sensitive device 15.

[0045] Preferably, in this embodiment, the air suction component includes an air pump 2, a main air pipe 3, a three-way joint 4 and a bronchial tube 5. The main air pipe 3 and the bronchial tube 5 are both made of PU material, which is called polyurethane in Chinese. It is superior to ordinary PVC material, has a good hand feel and is waterproof. The output end of the air pump 2 is connected to one end of the main air pipe 3, and the other end of the main air pipe 3 is connected to the two bronchial tubes 5 through the three-way joint 4. The two bronchial tubes 5 are respectively connected to the corresponding placement channels. The air pump 2 adsorbs the substance to be detected in the sampling bottle 20 into the sensitive device 15 through the air pipe, which promotes the reaction, has good sealing and high working efficiency.

[0046] Preferably, in this embodiment, the two bronchi 5 are connected to the corresponding placement channels via a first pneumatic connector 6 that is threadedly connected, which has good sealing performance and is easy to connect, thereby ensuring accurate detection data.

[0047] Preferably, in this embodiment, it also includes a first adjustment component for adjusting the position of the transmitting optical fiber 7 and a second adjustment component for adjusting the position of the detecting optical fiber 9.

[0048] The first adjustment component includes an X-direction hand screw 10 and a first Y-direction hand screw 11, and the number of the X-direction hand screw 10 and the first Y-direction hand screw 11 is multiple, and each group of the X-direction hand screw 10 and the first Y-direction hand screw 11 corresponds to one of the transmitting optical fibers 7, and the X-direction hand screw 10 and the first Y-direction hand screw 11 are both threadedly connected to the spectrometer insulation shell 8 corresponding to the position of the transmitting optical fiber 7, and a first through hole is provided on the top of the spectrometer insulation shell 8 corresponding to the vertical lower part of the transmitting optical fiber 7, and the through hole is connected to the placement channel; the second adjustment component includes a Z-direction hand screw 13 and a second Y-direction hand screw 12, and the number of the Z-direction hand screw 13 and the second Y-direction hand screw 12 is multiple, and each group of the Z-direction hand screw 13 and the second Y-direction hand screw 12 corresponds to one of the detection optical fibers 9, and the Z-direction hand screw 13 and the second Y-direction hand screw 1 2 are both threadedly connected to the spectrometer insulation shell 8 corresponding to the position of the detection optical fiber 9, and a second through hole is provided on the side wall of the spectrometer insulation shell 8 corresponding to the detection optical fiber 9, and the second through hole is communicated with the placement channel; W-shaped elastic parts are provided in two adjacent first through holes and two adjacent second through holes, and the two ends of the elastic parts in the two first through holes are respectively embedded in the two first through holes, and the two ends of the elastic parts in the two second through holes are respectively embedded in the two second through holes, and the probe of the emitting optical fiber 7 is inserted into the corresponding first through hole, and the position of the probe of the emitting optical fiber 7 is adjusted by the cooperation of the X-direction hand screw 10, the Y-direction first hand screw 11 and the corresponding elastic part, and the probe of the detection optical fiber 9 is inserted into the corresponding second through hole, and the position of the probe of the detection optical fiber 9 is adjusted by the cooperation of the Z-direction hand screw 13, the Y-direction second hand screw 12 and the corresponding elastic part.

[0049] By tightening the X-direction hand screw 10, the first Y-direction hand screw 11 and the elastic member, the position of the emitting optical fiber 7 in the X and Y directions is adjusted, and the X-direction hand screw 10 and the first Y-direction hand screw 11 are loosened, and the probe of the emitting optical fiber 7 is manually adjusted in the Z direction; by tightening the Z-direction hand screw 13, the second Y-direction hand screw 12 and the elastic member, the position of the detection optical fiber 9 in the Z and Y directions is adjusted, and the Z-direction hand screw 13 and the second Y-direction hand screw 12 are loosened, and the probe of the detection optical fiber 9 is manually adjusted in the X direction.

[0050] Preferably, in this embodiment, the elastic member is a reset spring 19, the reset spring 19 abuts against one side of the probe of the emitting optical fiber 7, and the X-direction hand screw 10 and the Y-direction first hand screw 11 abut against the other side of the probe of the emitting optical fiber 7.

[0051] Preferably, in this embodiment, a temperature sensor 21 is provided in the heat conductive block 16 to facilitate real-time monitoring of the heating or cooling temperature and to remind the staff to make timely adjustments.

[0052] Preferably, in this embodiment, a heating plate 18 is provided inside the heat conductive block 16 to cooperate with the semiconductor refrigerator 1 for rapid heating, thereby facilitating the need for temperature detection, improving work efficiency and saving labor costs.

[0053] Example 2

[0054] like Fig.12 As shown, this embodiment provides a fluorescence spectrometer, including: a semiconductor refrigerator 1 and a spectrometer insulation shell 8. When the spectrometer is installed and connected with a sampling bottle 20, a flange cover 22 is used for communication.

[0055] like Fig.11 As shown, the interior of the flange cover 22 is provided with an internal thread that cooperates with the external thread of the sampling bottle 20. The flange cover 22 is provided with a vent hole 221 for preventing the sampling bottle 20 from forming a negative pressure. There are multiple vent holes 221, which are evenly distributed along the circumferential direction. An O-ring 17 is provided in the flange cover 22. When the sensitive device 15 is replaced, the friction force of the sensitive device 15 can be provided. As long as the friction force is greater than the friction force of the O-ring 17 at the other end of the sensitive device 15, the sensitive device 15 can be taken out.

[0056] In addition, electrical components such as the air pump 2 and the temperature sensor 21 are all externally connected to a power source.

[0057] When the present invention is in use, the sampling bottle 20 with the substance to be detected is connected to the fluorescence spectrometer, the air pump 2 is used to inhale air, the substance to be detected is adsorbed into the sensitive device 15, the emitting optical fiber 7 is started for fluorescence irradiation, and a quenching reaction is performed. The position of the emitting optical fiber 7 and the detection optical fiber 9 is adjusted by adjusting the adjustment component and cooperating with the temperature adjustment of the semiconductor refrigerator 1. The temperature adjustment range is -20°C-80°C, and the only variable is controlled, so that the detection data is more accurate.

[0058] In the description of the present invention, it is necessary to understand that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred system or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0059] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fluorescence spectrometer, comprising: A semiconductor refrigerator (1) and a spectrometer heat preservation shell (8), wherein a heat conducting block (16) is embedded in the bottom of the spectrometer heat preservation shell (8), and the bottom of the heat conducting block (16) is fixedly connected to the semiconductor refrigerator (1), and two placement channels penetrating the spectrometer heat preservation shell (8) are arranged in the spectrometer heat preservation shell (8), and a sensitive device (15) is arranged in each of the two placement channels, and one end of the sensitive device (15) extends into the corresponding placement channel and passes through the heat conducting block (16) and the spectrometer heat preservation shell (8) in sequence. The rear end is connected to an air suction component for absorbing the substance to be tested in the sampling bottle (20), and the other end is connected to the sampling bottle (20). A plurality of emitting optical fibers (7) are arranged at intervals along the length direction of the spectrometer insulation shell (8) on the top of the spectrometer insulation shell (8), and a plurality of detection optical fibers (9) are arranged at intervals along the length direction of the spectrometer insulation shell (8) on opposite sides of the spectrometer insulation shell (8). The probes of the plurality of emitting optical fibers (7) and the plurality of detection optical fibers (9) can detect the interior of the corresponding placement channel; The air suction component comprises an air pump (2), a main air pipe (3), a three-way joint (4) and a bronchus (5); the output end of the air pump (2) is connected to one end of the main air pipe (3); the other end of the main air pipe (3) is connected to the two bronchus (5) via the three-way joint (4); the two bronchus (5) are respectively connected to the corresponding placement channels; The two bronchi (5) are both connected to the corresponding placement channels via a first pneumatic joint (6); It also includes a first adjustment component for adjusting the position of the emitting optical fiber (7) and a second adjustment component for adjusting the position of the detecting optical fiber (9); A temperature sensor (21) is provided in the heat conducting block (16); A heating plate (18) is provided in the heat conducting block (16).

2. The fluorescence spectrometer according to claim 1, characterized in that: The first adjustment component comprises an X-direction hand screw (10) and a first Y-direction hand screw (11), the X-direction hand screw (10) and the first Y-direction hand screw (11) being provided in a plurality of groups, each group of the X-direction hand screw (10) and the first Y-direction hand screw (11) corresponding to one of the emitting optical fibers (7), the X-direction hand screw (10) and the first Y-direction hand screw (11) being threadedly connected to the heat preservation shell (8) of the spectrometer at a position corresponding to the emitting optical fiber (7), the optical A first through hole is provided on the top of the spectrometer insulation shell (8) corresponding to the vertical lower side of the emitting optical fiber (7), and the through hole is communicated with the placement channel; the second adjustment component comprises a Z-direction hand screw (13) and a Y-direction second hand screw (12), and the number of the Z-direction hand screw (13) and the Y-direction second hand screw (12) is multiple groups, and each group of the Z-direction hand screw (13) and the Y-direction second hand screw (12) corresponds to one of the detection optical fibers (9), and the Z-direction hand screw (13) and the Y-direction second hand screw (12) are connected to each other. The second hand screw (12) is threadedly connected to the heat preservation shell (8) of the spectrometer corresponding to the position of the detection optical fiber (9); a second through hole is provided on the side wall of the heat preservation shell (8) of the spectrometer corresponding to the detection optical fiber (9); the second through hole is communicated with the placement channel; two adjacent first through holes and two adjacent second through holes are each provided with a W-shaped elastic member; two ends of the elastic member in the two first through holes are respectively embedded in the two first through holes; two ends of the elastic member in the two second through holes are respectively embedded in the two second through holes; the probe of the emitting optical fiber (7) is inserted into the corresponding first through hole; the position of the probe of the emitting optical fiber (7) is adjusted by the cooperation of the X-direction hand screw (10), the Y-direction first hand screw (11) and the corresponding elastic member; the probe of the detection optical fiber (9) is inserted into the corresponding second through hole; the position of the probe of the detection optical fiber (9) is adjusted by the cooperation of the Z-direction hand screw (13), the Y-direction second hand screw (12) and the corresponding elastic member.

3. The fluorescence spectrometer according to claim 2, characterized in that: The elastic member is a return spring (19), the return spring (19) abuts against one side of the probe of the emitting optical fiber (7), and the X-direction hand screw (10) and the Y-direction first hand screw (11) abut against the other side of the probe of the emitting optical fiber (7).

4. The fluorescence spectrometer according to any one of claims 1 to 3, characterized in that: The sensitive device (15) is connected to the sampling bottle (20) via a flange cover (22), and a vent hole is provided on the flange cover (22) for preventing the sampling bottle (20) from forming a negative pressure.

5. The fluorescence spectrometer according to claim 4, characterized in that: A second pneumatic connector (14) for connecting the sampling bottle (20) and the sensitive device (15) is provided in the flange cover (22), and an O-ring (17) for fixing the sensitive device (15) is provided in the flange cover (22) and on the first pneumatic connector (6).

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