CN207908325U - A kind of airborne particle counter - Google Patents
A kind of airborne particle counter Download PDFInfo
- Publication number
- CN207908325U CN207908325U CN201820281566.XU CN201820281566U CN207908325U CN 207908325 U CN207908325 U CN 207908325U CN 201820281566 U CN201820281566 U CN 201820281566U CN 207908325 U CN207908325 U CN 207908325U
- Authority
- CN
- China
- Prior art keywords
- nipple
- gas
- shell
- buffer tank
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a kind of airborne particle counters, including shell, gas buffer tank and lithium battery, shell is equipped with the first air inlet and the first gas outlet, the air pump being connected to the first gas outlet is equipped in shell, the laser that laser emitter is sent out forms scattering light after being normally incident in the scattering of the dust particle on photosensitive area after slit diaphragm, and photodetector, which receives scattering light and scattering light is changed into electric impulse signal, is transmitted to controller；Gas buffer tank is equipped with the second air inlet and the second gas outlet, second air inlet is connected with the sampling pipe equipped with pressure-regulating valve by seal swivel joint, second gas outlet is connected to the first air inlet and is equipped with flow control valve, and gas buffer tank is equipped with differential pressure pickup and exhaust pipe；Controller is electrically connected with lithium battery, air pump, laser emitter, photodetector, differential pressure pickup, pressure-regulating valve, flow control valve, air bleeding valve and display screen.The airborne particle counter is safe and reliable, good airproof performance, easy to use.
Description
Technical field
The utility model is related to Detection of Air Quality technical fields, more particularly to a kind of airborne particle counter.
Background technology
Airborne particle counter is answered extensively with for measuring the quantity of the total dirt particle of air and the instrument of particle diameter distribution
For industries such as medicine, electronics, precision machinery, colored picture tube manufacture, microorganisms, the workbench to various lustration classes, purification are realized
Room, the clean-up effect of cleaning shop and purification rank are monitored, to ensure the quality of product.Airborne particle counter is substantially former
Reason makes light receive and generate pulse signal by light-sensitive element after dust particle scatters, which is exported and amplified,
Then Digital Signal Processing is carried out, by being compared with standard particle signal, comparing result is represented with different parameters
Come.But existing airborne particle counter, the dust-laden situation in atmospheric air can only be measured, sampling flow is unable to control, from
And the dust-laden situation in high pressure gas or special gas can not be safely and effectively counted, and leakproofness of the sampling pipe in rotation
It can be poor.
Utility model content
The purpose of this utility model is to provide a kind of safe and reliable, good airproof performance, airborne particle counter easy to use,
To solve the above-mentioned problems of the prior art, containing in high pressure gas or special gas can be safely and effectively counted
Dirt situation.
To achieve the above object, the utility model provides following scheme：
A kind of airborne particle counter, including shell, gas buffer tank and lithium battery, the shell are equipped with the first air inlet
Mouth and the first gas outlet, the shell is interior to be equipped with air pump, and the outlet side of the air pump passes through pipeline and first gas outlet company
It is logical, laser emitter, slit diaphragm, photosensitive area and eliminating device are equipped in the shell, the photosensitive area is visited equipped with photoelectricity
Survey device, the laser that the laser emitter is sent out be normally incident in after the slit diaphragm first air inlet with it is described
On the photosensitive area between air pump, and scattering light, the photodetection are formed after the scattering of the dust particle of the photosensitive area
Device receives the scattering light and the scattering light is changed into electric impulse signal is transmitted to controller via signal processing circuit, institute
It states surface of shell and is provided with display screen；The gas buffer tank be equipped with the second air inlet and the second gas outlet, described second into
Gas port is connected with a sampling pipe by seal swivel joint, and the sampling pipe is equipped with pressure-regulating valve, the sampling pipe from
Sampler is connected with by end, second gas outlet is connected to first air inlet, and stream is equipped at second gas outlet
Adjustable valve, the gas buffer tank is interior to be equipped with differential pressure pickup, and the differential pressure pickup is equipped with and the gas buffer tank
The interior detection mouth of inside connection and the outer detection mouth that be connected to the gas buffer tank outside atmosphere, on the gas buffer tank and also
Equipped with the exhaust pipe being connected to gas buffer tank outside, the exhaust pipe is equipped with air bleeding valve；The lithium battery is set to
On the shell, the lithium battery is electrically connected with the controller, the controller and the air pump, the laser emitter,
The photodetector, the differential pressure pickup, the pressure-regulating valve, the flow control valve, the air bleeding valve and described
Display screen is electrically connected.
Preferably, it is laid with the first puigging in the inner walls, second is laid on the gas buffer chamber interior wall
Puigging.
Preferably, temperature sensor and humidity sensor are provided in the shell, the temperature sensor and described wet
Degree sensor is electrically connected with the controller.
Preferably, the lithium battery is removably connected on the lateral wall of the shell.
Preferably, it is removably connected with filter at first gas outlet, the filter is electrically connected with the controller
It connects, the filter lower part is removably connected with dust hopper.
Preferably, the housing bottom is provided with support rubber cushion.
Preferably, the display screen is capacitive touch screen.
Preferably, the seal swivel joint includes nipple and coupling, and the nipple and the coupling are
The first end of hollow connector, the nipple is sheathed in the second end of the coupling, and the second end of the nipple is stretched
Go out outside the second end of the coupling, be arranged with sealing ring and bearing in the first end of the nipple, the sealing ring it is interior
Surface and outer surface are in close contact with the lateral wall of the nipple and the madial wall of the coupling respectively, the bearing it is interior
Surface and outer surface are in close contact with the lateral wall of the nipple and the madial wall of the coupling respectively, the nipple and
Axial limit structure is equipped between the coupling to limit the bearing axial float, the first end of the coupling with it is described
Collection tube is tightly connected, and the second end of the nipple is sealedly attached at second air inlet.
Preferably, there are two the sealing ring and the bearing are respectively provided with, the nipple between two bearings
Lateral wall on be closely arranged with spacer, between the lateral wall of the spacer and the madial wall of the coupling have spacing.
Preferably, the axial limit structure includes outside the hole limit stop ring being embedded on coupling madial wall and nipple
The axis limit stop ring being embedded on side wall has between the madial wall and the lateral wall of the nipple of the hole limit stop ring
Spacing, has a spacing between the lateral wall and the madial wall of the coupling of the axis limit stop ring, the nipple it is outer
Wear-resistant gasket is closely arranged on side wall, the wear-resistant gasket is clamped to outside the hole limit stop ring and a bearing
Between side, there is spacing between the wear-resistant gasket and the madial wall of the coupling.
The utility model achieves following technique effect compared with the existing technology：
Airborne particle counter provided by the utility model, the second air inlet are connected with sampling by seal swivel joint
Pipe, sampling pipe can also realize good sealing performance in rotation, and sampling pipe is free to rotate in sampling, easy to use；It adopts
The gas of sample device sampling is passed first into gas buffer tank, can be surveyed by the differential pressure pickup being set in gas buffer tank
The pressure for the gas that must be sampled, when the pressure that differential pressure pickup measures the gas of sampling has been more than preset sample gas
When pressure, controller can be lowered into the gas flow to gas buffer tank, and the row of opening by adjusting pressure-regulating valve
High pressure gas part in gas buffer tank is discharged air valve, reduces the gas pressure in gas buffer tank, prevents gas buffer
Gas pressure in case is excessively high and is damaged to airborne particle counter；Meanwhile according to different gas and measurement demand,
The gas flow for entering to enclosure interior can be adjusted by adjusting flow control valve, adjust the measurement flow of airborne particle counter,
So that the result of test is more acurrate.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model
Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other attached drawings.
Fig. 1 is the main view cross-sectional view of airborne particle counter provided by the utility model；
Fig. 2 is the main view cross-section structure signal of the seal swivel joint of airborne particle counter provided by the utility model
Figure；
In figure：1- shells；The first air inlets of 11-；The first gas outlets 12-；The first puiggings of 13-；14- filters；15- collection
Dirt bucket；16- supports rubber cushion；2- gas buffer tanks；The second air inlets of 21-；The second gas outlets 22-；23- differential pressure pickups；231-
Interior detection mouth；The outer detection mouths of 232-；24- exhaust pipes；The second puiggings of 25-；3- lithium batteries；4- air pumps；51- laser emitters；
52- slit diaphragms；The photosensitive areas 53-；54- eliminating devices；6- seal swivel joints；61- nipples；62- couplings；63- is sealed
Circle；64- bearings；65- spacers；The holes 66- limit stop ring；67- axis limit stop rings；68- wear-resistant gaskets；7- sampling pipes；71- is pressed
Force regulating valve；72- samplers；8- temperature sensors；9- humidity sensors.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
The purpose of this utility model is to provide a kind of safe and reliable, good airproof performance, airborne particle counter easy to use,
To solve the above-mentioned problems of the prior art, containing in high pressure gas or special gas can be safely and effectively counted
Dirt situation.
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings and have
Body embodiment is described in further detail the utility model.
Embodiment one
The present embodiment provides a kind of airborne particle counters, as shown in Figure 1, including shell 1, gas buffer tank 2 and lithium electricity
Pond 3, shell 1 are equipped with the first air inlet 11 and the first gas outlet 12, are equipped with air pump 4 in shell 1, the outlet side of air pump 4 passes through
Pipeline is connected to the first gas outlet 12, and laser emitter 51, slit diaphragm 52, photosensitive area 53 and eliminating device are equipped in shell 1
54, photosensitive area 53 is equipped with photodetector, and the laser that laser emitter 51 is sent out is normally incident in after slit diaphragm 52
On photosensitive area 53 between first air inlet 11 and air pump 4, and scattering light, light are formed after the scattering of the dust particle of photosensitive area 53
Electric explorer receives scattering light and scattering light is changed into electric impulse signal is transmitted to controller, shell via signal processing circuit
1 surface is provided with display screen；The laser that laser emitter 51 is sent out enters eliminating device 54 and is absorbed behind photosensitive area 53,
Eliminating device 54 absorbs the laser by photosensitive area 53, the generation of the stray light in shell 1 is avoided, to further improve light
The resolution ratio of electric explorer improves the accuracy of airborne particle counter；Gas buffer tank 2 is fixedly installed on 1 top of shell,
Gas buffer tank 2 is equipped with the second air inlet 21 and the second gas outlet 22, and the second air inlet 21 is connected by seal swivel joint 6
There are a sampling pipe 7, sampling pipe 7 to be equipped with pressure-regulating valve 71, the free end of sampling pipe 7 is connected with sampler 72, the second outlet
Mouth 22 is connected to the first air inlet 11, and flow control valve is equipped at the second gas outlet 22, and pressure difference is equipped in gas buffer tank 2 and is passed
Sensor 23, differential pressure pickup 23 be equipped with the interior detection mouth 231 being connected to the inside of gas buffer tank 2 and with outside gas buffer tank 2
The outer detection mouth 232 of portion's atmosphere is additionally provided with the exhaust pipe 24 be connected to 2 outside of gas buffer tank on gas buffer tank 2, arranges
Tracheae 24 is equipped with air bleeding valve；Lithium battery 3 is set on shell 1, and lithium battery 3 is electrically connected with the controller, controller and air pump 4,
Laser emitter 51, photodetector, differential pressure pickup 23, pressure-regulating valve 71, flow control valve, air bleeding valve and display screen electricity
Connection.
Airborne particle counter provided in this embodiment, the second air inlet 21 are connected with sampling by seal swivel joint 6
Pipe 7, sampling pipe 7 can also realize good sealing performance in rotation, and sampling pipe 7 is free to rotate in sampling, easy to use；
The gas that sampler 72 samples is passed first into gas buffer tank 2, passes through the differential pressure pickup being set in gas buffer tank 2
23 can measure the pressure of the gas of sampling, when the pressure that differential pressure pickup 23 measures the gas of sampling has been more than preset
When the pressure of sample gas, controller can be lowered by adjusting pressure-regulating valve 71 to the gas in gas buffer tank 2
Flow, and air bleeding valve is opened, the high pressure gas part in gas buffer tank 2 is discharged, the gas pressure in gas buffer tank 2 is reduced
Power prevents the gas pressure in gas buffer tank 2 excessively high and is damaged to airborne particle counter；Meanwhile according to different
Gas and measurement demand, the gas flow entered to inside shell 1 can be adjusted by adjusting flow control valve, adjust dust particle
The measurement flow of counter so that the result of test is more acurrate.
Airborne particle counter provided in this embodiment is laid with the first puigging 13, gas buffer tank on 1 inner wall of shell
The second puigging 25 is laid on 2 inner walls.First puigging 13 is distributed on the entire inner wall of shell 1, and the second puigging 25
It is distributed on the entire inner wall of gas buffer tank 2, so as to improve the sound insulation value of airborne particle counter, effectively reduces dirt
Noise caused by angstrom corpuscular counter internal gas flow.
Be provided with temperature sensor 8 and humidity sensor 9 in shell 1, temperature sensor 8 and humidity sensor 9 with control
Device electrical connection processed, can measure the temperature and humidity of gas to be detected simultaneously.
Lithium battery 3 is removably connected on the lateral wall of shell 1, replacement lithium battery 3 easy to disassemble.
Filter 14 is removably connected at first gas outlet 12, filter 14 is electrically connected with the controller, under filter 14
Portion is removably connected with dust hopper 15, purification can be filtered to the gas after detection, and collect filtering using dust hopper 15
Impurity afterwards, filter 14 are detachable with dust hopper 15.
1 bottom of shell is provided with support rubber cushion 16, there is buffering to make the vibration in the airborne particle counter course of work
With, and airborne particle counter can be effectively prevent to be slid due to operational vibration and in table surface so that dust
Corpuscular counter course of work safety and reliability.
Display screen is capacitive touch screen, easy to operate.
Airborne particle counter provided in this embodiment, as shown in Fig. 2, seal swivel joint 6 is including nipple 61 and outside
Connector 62, nipple 61 and coupling 62 are hollow connector, and the first end of nipple 61 is sheathed on the second end of coupling 62
It is interior, and the second end of nipple 61 is stretched out outside the second end of coupling 62, and sealing ring 63 is arranged in the first end of nipple 61
It is close with the madial wall of the lateral wall of nipple 61 and coupling 62 respectively with the inner surface and the outer surface of bearing 64, sealing ring 63
The inner surface and the outer surface of contact, bearing 64 is in close contact with the lateral wall of nipple 61 and the madial wall of coupling 62 respectively,
Axial limit structure is equipped between nipple 61 and coupling 62 to limit 64 axial float of bearing, the first end of coupling 62 with
Collection tube 7 connects for thread seal, and the second end thread seal of nipple 61 is connected at the second air inlet 21.
It is arranged using the above structure, is rotated freely, reduced by the realization of bearing 64 between nipple 61 and coupling 62
Rotation difficulty between nipple 61 and coupling 62, the service life of the seal swivel joint 6 of raising, nipple 61 and external
Axial limit structure is equipped between first 62 can limit 64 axial float of bearing, improve the reliable of the work of seal swivel joint 6
Property.
There are two sealing ring 63 and bearing 64 are respectively provided with, closely covered on the lateral wall of the nipple 61 between two bearings 64
Equipped with spacer 65, there is spacing between the lateral wall and the madial wall of coupling 62 of spacer 65, spacer 65 can be avoided to be worn.
There are two bearings 64 for setting, can increase the guidance quality between nipple 61 and coupling 62, prevent nipple 61 and coupling 62
Between occur tilting it is outer turn round phenomenon, avoid between nipple 61 and coupling 62 because tilt it is twisted due to there is asking for seal failure
Topic.
Axial limit structure includes 61 lateral wall of hole limit stop ring 66 and nipple being embedded on 62 madial wall of coupling
On the axis limit stop ring 67 that is embedded, there is spacing between the madial wall and the lateral wall of nipple 61 of hole limit stop ring 66,
There is spacing between the lateral wall and the madial wall of coupling 62 of axis limit stop ring 67, closely covered on the lateral wall of nipple 61
Equipped with wear-resistant gasket 68, wear-resistant gasket 68 is clamped between hole limit stop ring 66 and 64 outside of bearing, wear-resistant gasket
There is spacing between 68 and the madial wall of coupling 62.
It is arranged using the above structure, using hole limit stop ring 66, axis limit stop ring 67 and spacer 65, can effectively prevents
The only axial float of two bearings 64 improves the reliability that seal swivel joint 6 works；Wear-resistant gasket 68 can effectively prevent axis
64 device to hole limiting gaskets 66 are held to cause to wear；Have between the madial wall and the lateral wall of nipple 61 of hole limit stop ring 66
Spacing has spacing, wear-resistant gasket 68 and coupling between the lateral wall and the madial wall of coupling 62 of axis limit stop ring 67
There is spacing so that will not device to hole limit stop ring during nipple 61 and 62 relative rotation of coupling between 62 madial wall
66, axis limit stop ring 67 and wear-resistant gasket 68 cause to wear.
Specific case is applied in the utility model to be expounded the principles of the present invention and embodiment, it is above
The explanation of embodiment is merely used to help understand the method and its core concept of the utility model；Meanwhile for the one of this field
As technical staff, according to the utility model thought, there will be changes in the specific implementation manner and application range.To sum up
Described, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. a kind of airborne particle counter, it is characterised in that：Including：
Shell, the shell are equipped with the first air inlet and the first gas outlet, are equipped with air pump in the shell, the air pump goes out
Gas end is connected to by pipeline with first gas outlet, and laser emitter, slit diaphragm, photosensitive area are equipped in the shell and is disappeared
Electro-optical device, the photosensitive area are equipped with photodetector, and the laser that the laser emitter is sent out is after the slit diaphragm
It is normally incident on the photosensitive area between first air inlet and the air pump, and through the dust particle of the photosensitive area
Scattering light is formed after scattering, the photodetector receives the scattering light and the scattering light is changed into electric impulse signal warp
Controller is transmitted to by signal processing circuit, the surface of shell is provided with display screen；
Gas buffer tank, the gas buffer tank are equipped with the second air inlet and the second gas outlet, and second air inlet passes through
Seal swivel joint is connected with a sampling pipe, and the sampling pipe is equipped with pressure-regulating valve, and the free end of the sampling pipe connects
There are sampler, second gas outlet to be connected to first air inlet, and be equipped with flow control valve at second gas outlet,
It is equipped with differential pressure pickup in the gas buffer tank, the differential pressure pickup is equipped with and is connected to inside the gas buffer tank
Interior detection mouth and the outer detection mouth being connected to the gas buffer tank outside atmosphere, be additionally provided on the gas buffer tank with it is described
The exhaust pipe being connected to outside gas buffer tank, the exhaust pipe are equipped with air bleeding valve；And
Lithium battery, the lithium battery are set on the shell, and the lithium battery is electrically connected with the controller, the controller
With the air pump, the laser emitter, the photodetector, the differential pressure pickup, the pressure-regulating valve, the stream
Adjustable valve, the air bleeding valve and display screen electrical connection.
2. airborne particle counter according to claim 1, it is characterised in that：Be laid in the inner walls first every
Sound-absorbing layer is laid with the second puigging on the gas buffer chamber interior wall.
3. airborne particle counter according to claim 1, it is characterised in that：It is provided with temperature sensor in the shell
And humidity sensor, the temperature sensor and the humidity sensor are electrically connected with the controller.
4. airborne particle counter according to claim 1, it is characterised in that：The lithium battery is removably connected to described
On the lateral wall of shell.
5. airborne particle counter according to claim 1, it is characterised in that：It is detachably connected at first gas outlet
There are filter, the filter to be electrically connected with the controller, the filter lower part is removably connected with dust hopper.
6. airborne particle counter according to claim 1, it is characterised in that：The housing bottom is provided with support glue
Pad.
7. airborne particle counter according to claim 1, it is characterised in that：The display screen is capacitive touch screen.
8. airborne particle counter according to claim 1, it is characterised in that：The seal swivel joint includes nipple
And coupling, the nipple and the coupling are hollow connector, and the first end of the nipple is sheathed on described external
In the second end of head, and the second end of the nipple is stretched out outside the second end of the coupling, the first end of the nipple
On be arranged with sealing ring and bearing, the inner surface and the outer surface of the sealing ring respectively with the lateral wall of the nipple and described
The madial wall of coupling is in close contact, the inner surface and the outer surface of the bearing respectively with the lateral wall of the nipple and described
The madial wall of coupling is in close contact, and axial limit structure is equipped between the nipple and the coupling to limit the axis
Axial float is held, the first end of the coupling is tightly connected with the collection tube, and the second end of the nipple is tightly connected
At second air inlet.
9. airborne particle counter according to claim 8, it is characterised in that：The sealing ring and the bearing are respectively provided with
There are two, spacer, the lateral wall of the spacer are closely arranged on the lateral wall of the nipple between two bearings
There is spacing between the madial wall of the coupling.
10. airborne particle counter according to claim 9, it is characterised in that：The axial limit structure includes external
The axis limit stop ring being embedded in the hole limit stop ring and nipple lateral wall being embedded on head madial wall, the hole limiting block
Between the madial wall of circle and the lateral wall of the nipple have spacing, the lateral wall of the axis limit stop ring with it is described external
There is spacing between the madial wall of head, wear-resistant gasket, the wear-resistant gasket quilt are closely arranged on the lateral wall of the nipple
Between being clamped on the outside of the hole limit stop ring and a bearing, the madial wall of the wear-resistant gasket and the coupling
Between have spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820281566.XU CN207908325U (en) | 2018-02-28 | 2018-02-28 | A kind of airborne particle counter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820281566.XU CN207908325U (en) | 2018-02-28 | 2018-02-28 | A kind of airborne particle counter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207908325U true CN207908325U (en) | 2018-09-25 |
Family
ID=63561454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820281566.XU Active CN207908325U (en) | 2018-02-28 | 2018-02-28 | A kind of airborne particle counter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207908325U (en) |
-
2018
- 2018-02-28 CN CN201820281566.XU patent/CN207908325U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206399778U (en) | Light scattering method Atmospheric particulates detection device and its sheath gas gas circuit | |
| CN101126652B (en) | Electronic gas meter for mass and flow | |
| CN104596807A (en) | Sampling measuring device and sampling measuring method of radioactive aerosol | |
| CN209068682U (en) | A kind of screen replacing warning device of the new blower of three permanent system | |
| CN110285930A (en) | The continuous leak detection system of one-component and its leak hunting method | |
| CN106501143A (en) | A kind of measuring instrument with gas concentration and powder concentration measurement function | |
| CN207516208U (en) | Gas-detecting device | |
| CN206930439U (en) | A kind of gas turbine vertical air inlet air filtration test device | |
| CN207908325U (en) | A kind of airborne particle counter | |
| CN209148489U (en) | A kind of dust concentration detection device | |
| CN110487337A (en) | A kind of flow sensor of plug-in type semi-parabolic multiple spot pressure | |
| CN201107068Y (en) | Electronic type gas meter for household | |
| CN207096098U (en) | A kind of infrared leak detector of high accuracy | |
| CN103837427B (en) | Paper permeability detector pressure-detecting device | |
| CN204594860U (en) | A kind of ammonia and VOC toxic and harmful nanocomposite optical sensor | |
| CN109297654A (en) | A kind of combustible gas intelligent monitor production information management system | |
| CN214097525U (en) | Novel online flue gas velocity of flow measuring device | |
| CN209167069U (en) | Air filter performance testing device | |
| CN109813642A (en) | A kind of dust control device | |
| CN220566275U (en) | Novel FFU fan wind speed test equipment | |
| CN109253982A (en) | infrared leak detector | |
| CN104062040B (en) | The measurement apparatus of electrostatic chuck electrostatic adsorption force | |
| CN204064313U (en) | Gas circuit damping filter | |
| CN216668826U (en) | Portable ventilation performance detection device | |
| CN207248695U (en) | Soil gas conductivity detector after one kind is poured water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |