CN109991370A - A kind of calibrating installation and method for diffusion type methylene oxide detecting instrument - Google Patents
A kind of calibrating installation and method for diffusion type methylene oxide detecting instrument Download PDFInfo
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- CN109991370A CN109991370A CN201910221567.4A CN201910221567A CN109991370A CN 109991370 A CN109991370 A CN 109991370A CN 201910221567 A CN201910221567 A CN 201910221567A CN 109991370 A CN109991370 A CN 109991370A
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 384
- 235000019256 formaldehyde Nutrition 0.000 title claims abstract description 144
- 238000009792 diffusion process Methods 0.000 title claims abstract description 31
- 238000009434 installation Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 111
- 108010066057 cabin-1 Proteins 0.000 description 29
- 238000007689 inspection Methods 0.000 description 7
- 239000002274 desiccant Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 238000004164 analytical calibration Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009610 hypersensitivity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
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- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention belongs to the technical fields of calibration, disclose a kind of calibrating installation for diffusion type methylene oxide detecting instrument, including calibrating cabin, the side in the calibration cabin is provided with air inlet, the other side is provided with gas outlet, it is internally provided with methylene oxide detecting instrument to be calibrated, vacuum meter, the air inlet is connected to gas generating unit, the gas generating unit is for generating multicomponent formaldehyde standard gas, it is connected with standard, the concentration for the multicomponent formaldehyde standard gas that the standard is generated for detection gas generating device, its detection accuracy is higher than methylene oxide detecting instrument to be calibrated, the gas outlet and vacuum pump, the connection of formaldehyde absorption tank, the vacuum pump is used to be evacuated from calibration cabin, the corresponding pressure value when gas that the vacuum meter is used to monitor inside calibration cabin is exhausted and absolutely not taken out, the formaldehyde absorption tank is for storing energy Enough absorb the liquid of formaldehyde.A kind of calibration method for diffusion type methylene oxide detecting instrument is also disclosed.
Description
Technical field
The present invention relates to the technical field of calibration more particularly to a kind of calibration cartridges for diffusion type methylene oxide detecting instrument
It sets and method.
Background technique
With the development of environmental protection cause, more and more enterprises and resident pay close attention to inhabitation and working environment, at present people couple
It is increasingly paid close attention in decorating and renovating material, the environment of residential location has become the object that people pay close attention to, portable formaldehyde
Sales volume is higher and higher in the market for detector, and the data standard that methylene oxide detecting instrument tests out is not allowed to be particularly important, however, now
Most of more and more domestic housed devices of research and development are diffusion type, and without thief hatch, test result is not quite similar, and related
The limit value of national standard such as GB/T18883-2002 is required compared to being higher by several times even more than ten times, to people cause it is certain probably
Unbearably, so the measurement and calibration of these diffusion type equipment is particularly important.
The matched multicomponent formaldehyde standard gas generating device calibrating gas of national metrological verification regulations JJG 1022-2016
It is picked out by pipeline, has thief hatch and the methylene oxide detecting instrument with diffusion shell that can be calibrated.For convenience, accurately calibration
The methylene oxide detecting instrument for not wearing diffusion shell accesses calibration cabin in formaldehyde standard gas rear end, to facilitate calibration diffusion type formaldehyde
Detector, formaldehyde gas monitor and alarm etc..Since calibration cabin product is big, cabin is passed directly by formaldehyde standard gas pipeline
It is longer that body empties the cabin hollow gas time, and not can determine that whether air is drained in calibration cabin, if air is not in calibration cabin
It is drained, calibrates formaldehyde gas concentration in cabin and be just not equal to the formaldehyde issued in multicomponent formaldehyde standard gas generating device
Standard gas concentration reduces the accuracy of calibration.
Therefore, in order to overcome in the market most of diffusion type formaldehyde tester it is multifarious without diffusion shell or diffusion shell
The difficulties such as cause piping connection problematic, are badly in need of a kind of calibration method suitable for diffusion type methylene oxide detecting instrument.
Summary of the invention
The present invention provides a kind of calibrating installations and method for diffusion type methylene oxide detecting instrument, solve existing formaldehyde inspection
The problems such as accuracy for surveying instrument calibration is not high, poor universality.
The present invention can be achieved through the following technical solutions:
The side of a kind of calibrating installation for diffusion type methylene oxide detecting instrument, including calibration cabin, the calibration cabin is provided with
Air inlet, the other side are provided with gas outlet, are internally provided with methylene oxide detecting instrument to be calibrated, vacuum meter, the air inlet and gas
Generating device connection, the gas generating unit are used to generate multicomponent formaldehyde standard gas, be connected with standard, the mark
The concentration for the multicomponent formaldehyde standard gas that quasi- device is generated for detection gas generating device, detection accuracy are higher than first to be calibrated
Aldehyde detector, the gas outlet are connected to vacuum pump, formaldehyde absorption tank, and the vacuum pump is used to be evacuated from calibration cabin, described true
The corresponding pressure value when gas that empty table is used to monitor inside calibration cabin is exhausted and absolutely not taken out, the formaldehyde absorption tank
For storing the liquid that can absorb formaldehyde.
Further, the pressure value is set as volume, the speed of exhaust of vacuum pump according to calibration cabin, and calculating exhausts calibration
It time needed for gas inside cabin, is evacuated using vacuum pump, after the time, the pressure of the vacuum meter detection
Value.
Further, the position of the gas outlet is higher than air inlet position, and the methylene oxide detecting instrument setting to be calibrated is being calibrated
The bottom in cabin.
Further, it is provided with first switch on the pipeline that the gas generating unit is connected to air inlet, the vacuum pump,
Second switch is also provided on the pipeline that formaldehyde absorption tank is connected to gas outlet.
Further, the gas outlet is also connected to formaldehyde monitor, and the formaldehyde monitor is used to monitor going out for calibration cabin
The formaldehyde gas concentration of port.
A kind of calibration method based on the calibrating installation described above for diffusion type methylene oxide detecting instrument, including following step
It is rapid:
Step 1: closing air inlet, gas outlet is opened, is evacuated using vacuum pump, until the detected value of vacuum meter reaches
To the pressure value, stop pumping；
Step 2: closing gas outlet, gas generating unit and air inlet, the multiple groups that the gas generating unit generates are opened
Formaldehyde standard gas is divided to enter calibration cabin, until the detected value of vacuum meter is zero；
Step 3: opening gas outlet, it is made to be connected to formaldehyde absorption tank, keeps the multicomponent formaldehyde Standard Gases inside calibration cabin
Body dynamic circulates, and opens standard, compares the detection numerical value of methylene oxide detecting instrument and standard to be calibrated at this time, completes calibration.
Further, the step 3 further include: open gas outlet, it is made to be connected to formaldehyde absorption tank, keep inside calibration cabin
Multicomponent formaldehyde standard gas dynamic circulate, open standard, the detected value of first comparison standard and formaldehyde monitor, until
The detected value of the two is consistent, then compares the detection numerical value of methylene oxide detecting instrument and standard to be calibrated at this time.
Further, constant duration records the detection numerical value of methylene oxide detecting instrument and standard to be calibrated.
The present invention is beneficial to be had the technical effect that
By the cooperation of vacuum pump and vacuum meter, in conjunction with the speed of exhaust of vacuum pump and the volume in calibration cabin, it is ensured that calibration
Gas inside cabin, which can be completed, to be exhausted, and guarantees the multiple groups that can be filled with gas generating unit generation inside calibration cabin purely
Divide formaldehyde standard gas, to make to calibrate the multicomponent that multicomponent formaldehyde standard gas concentration gas generating unit issues in cabin
The concentration of formaldehyde standard gas is identical, and the gas outlet for calibrating cabin is connected to formaldehyde absorption tank, opens simultaneously air inlet and goes out
Port makes multicomponent formaldehyde standard gas continuously be passed through calibration cabin, keeps dynamic to circulate, to calibrate the formaldehyde in cabin
Standard gas concentration is constantly stable, provides reliable technology to the calibration of diffusion type formaldehyde gas detector and guarantees.Meanwhile
Absorbing liquid inside formaldehyde absorption tank can preferably absorb the formaldehyde that gas outlet releases, and reduce the pollution to environment, use
Calibrating installation of the invention can calibrate diffusion type formaldehyde testers all on the market, be preferably offering customers service, general
Property high, use easy to spread.
Detailed description of the invention
Fig. 1 is general structure schematic diagram of the invention；
Wherein, 1- calibrates cabin, 11- air inlet, the gas outlet 12-, 2- methylene oxide detecting instrument to be calibrated, 3- vacuum meter, 4- gas
Generating device, 5- vacuum pump, 6- formaldehyde absorption tank, 7- Temperature Humidity Sensor, 8- desiccant.
Specific embodiment
With reference to the accompanying drawing and the preferred embodiment specific embodiment that the present invention will be described in detail.
As shown in Figure 1, the present invention provides a kind of calibrating installation for diffusion type methylene oxide detecting instrument, including calibration cabin 1,
The side in the calibration cabin 1 is provided with air inlet 11, and the other side is provided with gas outlet 12, is internally provided with methylene oxide detecting instrument to be calibrated
2, vacuum meter 3, the air inlet 11 are connected to gas generating unit 4, and the gas generating unit 4 is for generating multicomponent formaldehyde standard
Gas is connected with standard, which is used for the dense of the multicomponent formaldehyde standard gas that detection gas generating device 4 generates
Degree, detection accuracy are higher than methylene oxide detecting instrument 2 to be calibrated, which is connected to vacuum pump 5, formaldehyde absorption tank 6, the vacuum
Pump 5 from calibration cabin 1 for being evacuated, when the gas which is used to monitor inside calibration cabin 1 is exhausted and absolutely not taken out
Corresponding pressure value, the formaldehyde absorption tank 6 is for storing the liquid that can absorb formaldehyde.
Pressure value of gas when being exhausted completely inside calibration cabin 1 can be according to calibrating the volume in cabin 1, vacuum pump 5
The speed of exhaust, is then evacuated using vacuum pump 5, by this time needed for first calculating the gas exhausted inside calibration cabin 1
After time, it is equivalent to and the gas inside calibration cabin 1 is exhausted, the pressure value that vacuum meter 3 detects at this time.For example, the body in calibration cabin 1
Product is 10L, and before being evacuated, the detected value on vacuum meter 3 is 0kpa, and the speed of exhaust of vacuum pump 5 is 0.5ml/min calculating
The time that the cabin for calibrating cabin 1 is evacuated is 20 minutes, by after twenty minutes, being equivalent to the gas inside calibration cabin 1
It exhausts, sees that the detected value that vacuum meter 3 is shown in the cabin in calibration cabin 1 is -41.73kPa.In this way, in calibration, it can be first with
5 pairs of calibration cabins 1 of vacuum pump are evacuated, until the detected value of vacuum meter 3 reaches above-mentioned pressure value, so that it may determine calibration cabin 1
Internal gas is exhausted, to guarantee be filled with the generation of gas generating unit 4 multicomponent formaldehyde with calibrating 1 pure interior of cabin
Calibrating gas, without other gaseous impurities.
Since the concentration of the multicomponent formaldehyde standard gas of the generation of gas generating unit 4 can not be continual and steady, have slightly
Perhaps change, while over time, formaldehyde gas itself is easier to decay, and in order to improve the precision of calibration, can make
It calibrates the gas inside cabin 1 and keeps dynamic stability, the position of the gas outlet 12 is higher than 11 position of air inlet, the formaldehyde inspection to be calibrated
The bottom that calibration cabin 1 is arranged in instrument 2 is surveyed, after calibrating inside cabin 1 full of multicomponent formaldehyde standard gas, opens simultaneously air inlet
11, gas outlet 12, the multicomponent formaldehyde standard gas for keeping it internal are in dynamic circulation status, to guarantee formaldehyde inspection to be calibrated
It surveys in multicomponent formaldehyde standard gas of the instrument 2 always in holding dynamic stability.
The gas outlet 12 is also connected to formaldehyde monitor, which is used to monitor the gas outlet 12 in calibration cabin 1
Formaldehyde gas concentration, detection accuracy can be such as standards, in this way, by comparing the inspection of Formaldehyde analyzer and standard
Measured value can be checked and judge whether the gas calibrated inside cabin 1 is exhausted, and keep calibrating 1 inside multicomponent formaldehyde standard of cabin
In the case that gas-dynamic circulates, if the detected value difference of the two is very big, illustrate that the foreign gas calibrated inside cabin 1 is not complete
It exhausts entirely, air inlet 11 can be continued through to calibration 1 inner inflatable of cabin, foreign gas is slowly discharged, until the inspection of the two
Measured value is consistent.
In order to easy to operate, it is provided with first switch on the pipeline which is connected to air inlet 11, this is true
Second switch is also provided on the pipeline that sky pump 5, formaldehyde absorption tank 6 are connected to gas outlet 12.
Gas generating unit 4 not only can may be used using existing multicomponent formaldehyde standard gas generating device in the market
To generate formaldehyde gas, its concentration can also be detected, and its detection accuracy is also to be measured to calibrate, inspection with higher
Precision is surveyed, can be used as standard to use, special setting standard is may dispense in this way and carrys out the generation of detection gas generating device 4
Formaldehyde gas concentration, and be used to monitor calibration cabin 1 inside gas whether with multicomponent formaldehyde standard gas generating device
The consistent formaldehyde monitor of the gas concentration of display can be used, and such as have hypersensitivity, accuracy and accuracy, and without drift
Trace-gas monitor Picarro producer production KY/DG1107 formaldehyde monitor monitor real-time monitoring gas generating unit 4
The formaldehyde gas concentration of generation, since the formaldehyde monitor volume is larger, inconvenience is directly placed into inside calibration cabin 1, can be by it
It is connected directly with gas outlet 12.If the detected value difference of the two is very big, illustrate that the foreign gas calibrated inside cabin 1 is not complete
It exhausts, it can be by continuing through air inlet 11 to calibration cabin 1 in the case where keeping calibration 1 internal gas of cabin dynamic to circulate
Foreign gas is slowly discharged inner inflatable, until the detected value of the two is consistent.
The calibration cabin 1 can be made of transparent material, convenient for observing the detection numerical value of methylene oxide detecting instrument 2 to be calibrated,
Inside is additionally provided with Temperature Humidity Sensor 7 and desiccant 8, and top or side can switch instrument and be put into mouth 9, convenient for place to
Methylene oxide detecting instrument is calibrated, while the drying property of multicomponent formaldehyde standard gas can be kept, it is warm and humid inside monitoring calibration cabin 1
Degree.The standard can also be placed on inside calibration cabin 1, keep it with methylene oxide detecting instrument 2 to be calibrated in same environment, more
Help to calibrate.
The present invention also provides a kind of calibrations based on the calibrating installation described above for diffusion type methylene oxide detecting instrument
Method, comprising the following steps:
Step 1: closing air inlet 11, gas outlet 12 is opened, is evacuated using vacuum pump 5, until the inspection of vacuum meter 3
Measured value reaches above-mentioned pressure value, stops pumping；
Step 2: closing gas outlet 11, gas generating unit 4 and air inlet 12 are opened, what which generated
Multicomponent formaldehyde standard gas enters calibration cabin 1, until the detected value of vacuum meter 3 is zero；
Step 3: opening gas outlet 11, it is made to be connected to formaldehyde absorption tank 6, keeps the multicomponent formaldehyde mark inside calibration cabin 1
Quasi- gas-dynamic circulation, opens standard, compares the detection numerical value of methylene oxide detecting instrument 2 and standard to be calibrated at this time, complete school
It is quasi-.
In order to ensure the gas inside calibration cabin 1 is exhausted completely by vacuum pump 5, gas outlet is opened, so that it is connected to formaldehyde and inhales
Closed cans keeps the multicomponent formaldehyde standard gas dynamic inside calibration cabin to circulate, after opening standard, first comparison standard and first
The detected value of aldehyde monitor, if unanimously, then compare the detection numerical value of methylene oxide detecting instrument and standard to be calibrated at this time, otherwise, etc.
To a period of time, until the detected value of the two is consistent, then compare the detection numerical value of methylene oxide detecting instrument and standard to be calibrated at this time.
In order to improve the accuracy of calibration, the detection of methylene oxide detecting instrument and standard to be calibrated can be recorded with constant duration
Numerical value such as recorded the detection numerical value of methylene oxide detecting instrument 2 and standard to be calibrated every 10 minutes, amounted to 6 times, corresponding numerical value difference
For 0.36 μm of ol/mol, 0.36 μm of ol/mol, 0.36 μm of ol/mol, 0.36 μm of ol/mol, 0.37 μm of ol/mol, 0.36 μm of ol/
Mol, calculating its repeatability is 1.13%；0.36 μm of ol/mol, 0.36 μm of ol/mol, 0.36 μm of ol/mol, 0.35 μm of ol/mol,
0.36 μm of ol/mol, 0.36 μm of ol/mol calculate it as repeatability 1.13%.
The present invention by vacuum pump and vacuum meter cooperation, in conjunction with vacuum pump the speed of exhaust and calibration cabin volume, really
The gas protected inside calibration cabin, which can be completed, to be exhausted, and guarantees that gas generating unit generation can be filled with inside calibration cabin purely
Multicomponent formaldehyde standard gas, thus make calibrate cabin in multicomponent formaldehyde standard gas concentration gas generating unit sending
The concentration of multicomponent formaldehyde standard gas is identical, and the gas outlet for calibrating cabin is connected to formaldehyde absorption tank, opens simultaneously air inlet
Mouth and gas outlet make multicomponent formaldehyde standard gas continuously be passed through calibration cabin, dynamic equilibrium are kept, to calibrate in cabin
Formaldehyde standard gas concentration it is constantly stable, provide reliable technology to the calibration of diffusion type formaldehyde gas detector and protect
Card.Meanwhile the absorbing liquid inside formaldehyde absorption tank, the formaldehyde that gas outlet releases can be preferably absorbed, is reduced to environment
Pollution, diffusion type formaldehyde testers all on the market can be calibrated using calibrating installation of the invention, is preferably provided for client
Service, versatility is high, use easy to spread.
Although specific embodiments of the present invention have been described above, it will be appreciated by those of skill in the art that these
It is merely illustrative of, without departing from the principle and essence of the present invention, a variety of changes can be made to these embodiments
It more or modifies, therefore, protection scope of the present invention is defined by the appended claims.
Claims (8)
1. a kind of calibrating installation for diffusion type methylene oxide detecting instrument, it is characterised in that: described to calibrate the one of cabin including calibrating cabin
Side is provided with air inlet, and the other side is provided with gas outlet, is internally provided with methylene oxide detecting instrument to be calibrated, vacuum meter, the air inlet
Mouth is connected to gas generating unit, and the gas generating unit is for generating multicomponent formaldehyde standard gas, with standard phase
Even, the concentration for the multicomponent formaldehyde standard gas that the standard is generated for detection gas generating device, detection accuracy are high
In methylene oxide detecting instrument to be calibrated, the gas outlet is connected to vacuum pump, formaldehyde absorption tank, and the vacuum pump is used to take out from calibration cabin
Gas, the corresponding pressure value when gas that the vacuum meter is used to monitor inside calibration cabin is exhausted and absolutely not taken out are described
Formaldehyde absorption tank is for storing the liquid that can absorb formaldehyde.
2. the calibrating installation according to claim 1 for diffusion type methylene oxide detecting instrument, it is characterised in that: the pressure value
It is set as volume, the speed of exhaust of vacuum pump according to calibration cabin, the time needed for calculating the gas exhausted inside calibration cabin, benefit
It is evacuated with vacuum pump, after the time, the pressure value of the vacuum meter detection.
3. the calibrating installation according to claim 1 for diffusion type methylene oxide detecting instrument, it is characterised in that: the gas outlet
Position be higher than air inlet position, the methylene oxide detecting instrument to be calibrated be arranged in calibration cabin bottom.
4. the calibrating installation according to claim 3 for diffusion type methylene oxide detecting instrument, it is characterised in that: the gas hair
First switch is provided on the pipeline that generating apparatus is connected to air inlet, the vacuum pump, formaldehyde absorption tank are connected to gas outlet
Also second switch is provided on pipeline.
5. the calibrating installation according to claim 1 for diffusion type methylene oxide detecting instrument, it is characterised in that: the gas outlet
It is also connected to formaldehyde monitor, the formaldehyde monitor is used to monitor the formaldehyde gas concentration of the gas outlet in calibration cabin.
6. a kind of calibration method based on the calibrating installation described in claim 1 for diffusion type methylene oxide detecting instrument, feature
Be the following steps are included:
Step 1: closing air inlet, gas outlet is opened, is evacuated using vacuum pump, until the detected value of vacuum meter reaches institute
Pressure value is stated, pumping is stopped；
Step 2: closing gas outlet, gas generating unit and air inlet, the multicomponent first that the gas generating unit generates are opened
Aldehyde calibrating gas enters calibration cabin, until the detected value of vacuum meter is zero；
Step 3: opening gas outlet, it is made to be connected to formaldehyde absorption tank, keeps the multicomponent formaldehyde standard gas inside calibration cabin dynamic
State circulation, opens standard, compares the detection numerical value of methylene oxide detecting instrument and standard to be calibrated at this time, completes calibration.
7. the calibration method according to claim 6 for diffusion type methylene oxide detecting instrument, it is characterised in that the step 3
Further include: gas outlet is opened, it is made to be connected to formaldehyde absorption tank, keeps the multicomponent formaldehyde standard gas dynamic stream inside calibration cabin
It is logical, standard is opened, the detected value of first comparison standard and formaldehyde monitor until the detected value of the two is consistent, then compares this
When methylene oxide detecting instrument and standard to be calibrated detection numerical value.
8. the calibration method according to claim 6 for diffusion type methylene oxide detecting instrument, it is characterised in that: constant duration
Record the detection numerical value of methylene oxide detecting instrument and standard to be calibrated.
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| CN201910221567.4A CN109991370A (en) | 2019-03-22 | 2019-03-22 | A kind of calibrating installation and method for diffusion type methylene oxide detecting instrument |
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| CN201910221567.4A CN109991370A (en) | 2019-03-22 | 2019-03-22 | A kind of calibrating installation and method for diffusion type methylene oxide detecting instrument |
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