ATMON FL GAS ANALYSER - FREQUENTLY ASKED QUESTIONS

2020-03-30
ATMON FL GAS ANALYSER - FREQUENTLY ASKED QUESTIONSIn this article we collected the most frequently asked questions about the mobile gas analyser Atmon FL produced by the Polish company Nanosens. It can test the atmosphere for up to 6 specific gases and dusts and is compact enough to be mounted on a Yuneec H520 drone. We invite you to read it.







Table of Contents:
1. What do AQ and RI sensors measure?
2. What technical standards does Atmon FL meet?
3. Will the smoke not be dissipated by the rotors? Do they not interfere with repeatability of measurement?
4. Will the measurement in Atmon FL mode on a drone and suspended under a drone be the same?
5. What is the warranty period?
6. Where are the data stored?
7. Urban I - for normative measurements; Urban II - for the location of origin of pollutants. - Why and how do they differ?
8. What is the lifetime of the sensors?
9. How long is calibration recommended?
10. Can data be transmitted live to the cloud?
11. What is the full list of available sensors?
12. What measurement method does Atmon use?
13. Under what atmospheric conditions can the FL Atmonium be used? Can it be used in an environment with a lot of steam or in the rain?
14. How does the Atmon take a sample for analysis?
15. Does it make sense to take an air sample with a tube?
16. How is calibration performed?
17. Is the user panel available in English?
18. Can a chimney test report be printed?
19. Is it possible to create smog clouds maps?
20. Does the Atmona not interfere with the drone transmitter?
21. What is the error in the measurement of the Atmon?
22. Who in Poland already uses Atmon?
23. What is PM?
24. What are the reliable sources of knowledge on air pollution?
25. Atmon FL in S.M.O.K. version: what are the sensors and what is its purpose?
26. Is the oxygen sensor compatible with Atmon?
27. Can the FL Atmonas can work in the rain?
28. What does the result file with the saved data from the Atmon look like and what data does it contain?
29. What substances are recommended for detecting the incineration of illegal waste in domestic furnaces and why?
30. What transmission frequencies does the Atmon use and what is the power of its transmitter?
31. What is the maximum number of sensors?
32. Which tablet or computer is currently recommended to work with ATMON?
33. Are the sensors in Atmon interchangeable? Can you replace them yourself?


YUNEEC H520 NANOSENS ATMON FL


1. What do AQ and RI sensors measure? AQ and RI sensors measure the concentration of substance complexes, which means that each of them measures the concentration of several gases and shows an average resultant value. The substances making up the complex have been selected for certain common features:
  • AQ (Air Quality) - measures overall air quality, the complex contains : CO, H2S, NO, SO2
  • RI (Respiratory Irritants) - measures concentrations of frequently occurring respiratory irritant gases: NO2, O3, CL2, HC
The URBAN II configuration contains AQ and RI sensors, so it can be used for more general localization of the origin of pollutants, without indicating their type. The URBAN I version has separate sensors for specific gases, making it more suitable for normative measurements. The SMOK configuration, on the other hand, includes gas sensors recommended for chimney sweeps for Municipal Guards by the Central European Drones Demonstrator.

2. What technical standards does Atmon FL meet?
It has a certificate of conformity of the manufacturer to the standards harmonised with the EU directive EMC 2004/108/EC and 94/9/EC ATEX with later amendments.

3. Will the smoke not be dissipated by the rotors? Do they not interfere with repeatability of measurement?
Smoke from a chimney can be dispersed in so many ways (depending on air humidity, wind strength and direction, atmospheric pressure and even sunlight) that regardless of the technology used the repeatability will be limited. The slightest wind blow when measuring outside a chimney duct will cause changes in the readings and is a physically natural phenomenon. Therefore, outside a chimney duct, we make only approximate measurements - and that is what they are supposed to be. In order to make a precise measurement, it has to be taken deep inside the chimney duct, but in the case of drone flights it is not practical. Measurements with a high repeatability of results can be taken with FL Atmon in an environment where we can ensure repeatability of conditions. Whether the smoke will be dissipated by the rotors - of course, as well as by the smallest gust of wind. However, in the H520+ATMON system, the rotor string facilitates sampling. When approaching the floating smoke trail from the bottom/side of the propeller, the smoke will "cheer up" and direct it towards the sensor, making measurement easier. We have tested this solution in practice many times and it works perfectly and the measurement is easy and safe. In real life conditions, the approaching as close as possible to the chimney outlet misses the target, because we still measure the smoke partially dispersed in the air. Therefore, using Atmon is safe because it eliminates the need to get as close as possible to the chimney outlet. Analysing the gas from the chimney, measurements can and should be made at a distance from the outlet (1m or more). The accuracy of the plume will have a greater impact on the measurement than the proximity of the chimney.

4. Will the measurement in Atmon FL mode on a drone and suspended under a drone be the same?
If you take into account the lack of complete repeatability of the measurement described in point 3, yes, these measurements will be the same. After the tests we see a low need to use the suspended mode, although in some specific cases this mode may apply. However, in the vast majority of cases the drone installation will be a much better solution.

5. What is the warranty period?
The warranty period for the ATMON FL central platform is 24 months, according to the NANOSENS warranty conditions (https://www.nanosens.pl/serwis-urzadzen/). The warranty period for the sensors is 1 year.

6. Where are the data stored?
Data is normally saved on the computer to which the ground module is connected when the "save" option is selected in the AtmonFL Ground Unit. Even at longer distances, possible lost packets are not a problem when saving is every 1s.

7. Urban I - for normative measurements; Urban II - for the location of origin of pollutants. - Why and how do they differ?
The two variants differ in some sensors, and the location measurement and meeting standards are identical in both models. The configuration version 'Urban I' has single-gas sensors and is therefore more suitable for normative measurements (normative measurements are based on the measurement of specific substances).

8. What is the lifetime of the sensors?
The lifetime of the sensors is for normal conditions (applies to Urban I and II configurations) about 10 years. During this time, the sensors should be calibrated regularly and the Atmon battery should not be discharged in order to maintain good condition.

9. How long is calibration recommended?
Calibration is recommended to be performed once a year, and for very intensive use once every six months. The cost of calibration and diagnostics is not included in the product price.

10. Can data be transmitted live to the cloud?
The transmission to the cloud will probably be available from Q3 2020. (at the moment when the pandemic is ongoing, these deadlines may change). The user will have to bear the cost of the subscription related to the data transmission. The cost includes the subscription for the sim card, unlimited data transfer from the device, server and user account maintenance.



YUNEEC H520 NANOSENS ATMON




11. What is the full list of available sensors?
AQ - Air Quality - the sensor measures a complex of substances which are the main determinants of low air quality
RI - Irritants - sensor measures respiratory irritants complex
C2H6O - ethanol
Cl2 - chlorine
CO - carbon monoxide
CO2 - carbon dioxide
H2S - hydrogen sulphide
HCHO - formaldehyde
HCl - Hydrogen chloride
VOC - Volatile Organic Compounds
NH3 - ammonia
NO - nitrogen oxide
NO2 - nitrogen dioxide
O3 - ozone
SO2 - sulphur dioxide
PM10 and 2,5 - Particulate Matter - suspended particulates

12. What measurement method does Atmon use?
For particulate matter (PM) Atmon uses the laser method, which is optical. For other media, electrochemical sensors are used.

13. Under what atmospheric conditions can the FL Atmon be used? Can it be used in an environment with a lot of steam or in the rain?
Atmon can take measurements in conditions up to 95% humidity but not in condensation. As for the other conditions (temperature, etc.), you can assume the same parameters/conditions for the Atmon as for the Yuneec H520 drone. Due to its casing, the Atmon can operate in light rain, provided that there is no strong wind (more than 5 m/s) that causes "slanting" rain.

14. How does the Atmon take a sample for analysis?
The Atmon takes a sample by force: the sample is sucked under pressure through an opening in the housing into the interior of the Atmon, where the sensors for the individual gases are located. The sample is then blown outside through an outlet. The air exchange in the device takes a few seconds.

15. Does it make sense to take an air sample with a tube?
Tube sampling has far more disadvantages than advantages. The tube has a significant impact on the measurement of dusts, as these are deposited inside the tube. Even Kevlar or carbon thin-walled tubes interfere with the results anyway. In addition, the propeller string will always interfere with the sampling with the tube, unless it is very long (reaching far beyond the outline of the drone's arms). In Atmona, a sequence of propellers (which is inevitable anyway) helps the measurement instead of interfering.

16. How is calibration performed?
Atmon is calibrated with calibration gases according to EU guidelines.

17. Is the user panel available in English?
Yes.

18. Can a chimney test report be printed?
Each measurement can be completely saved on the computer or tablet to which the Atmon Ground Unit is connected. The data is saved in the form of a csv, which makes it easy to process and create a report. In addition, the current readings are displayed in the user panel along with the coordinates. By taking a screenshot, we can quickly and easily record the readings at a given moment for a given place, time and altitude, and a graph of the concentration in time for one substance. It is also planned to extend the reporting functionality of the software included in the sensor.

19. Is it possible to create smog clouds maps?
Each of the majority of GIS-type programs allows importing data from different file types. Each data point created by Atmon contains information about the place and height of measurement, and the concentration of all substances. This information is sufficient to create a pollution map in the relevant programme.

20. Does the Atmona not interfere with the drone transmitter?
No. By default, the Atmone transmits in the 433 MHz band, which H520 does not use at all. In addition, the Atmon works in a fuzzy spectrum system, which minimises any interference with other devices.

YUNEEC H520 NANOSENS ATMON




21. What is the error in the measurement of the Atmon?
The measurement error (measurement uncertainty) is reported separately for each substance. Information on the measurement range and uncertainty of measurement can be found on the product fiches, and in the documentation accompanying the device. Each kit shall be accompanied by a calibration certificate from the manufacturer certifying the measurement error.

22. Who in Poland already uses Atmon?
It is used by Municipal Guards and rescue services. Currently, research works are also carried out using Atmon in the Scientific and Research Centre for Fire Protection.

23. What is PM?
It is an indicator of the concentration of the Particulate Matter (PM) mixture in the atmosphere. PM10 is an indicator which determines the level of contamination by particles with a diameter of less than 10 µm (micrometer - one thousandth of a millimeter). The dust concentration is calculated in micrograms per cubic meter [µg/m3]. The standards for dust concentration in the air can be found here: http://www.gios.gov.pl/pl/aktualnosci/294-normy-dla-pylow-drobnych-w-polsce

24. What are the reliable sources of knowledge on air pollution?
http://airindex.eea.europa.eu
https://www.airqualitynow.eu/pollution_home.php
http://www.euro.who.int/en/health-topics/environment-and-health/air-quality/data-and-statistics

25. Atmon FL in S.M.O.K. version: what are the sensors and what is its purpose?
ATMON S.M.O.K. is one of the Atmon variants designed to measure chimney stacks for identification of houses where rubbish is burned. Individual sensors in this variant have been selected to comply with the recommendations of the Central European Drones Demonstrator. It can measure PM2.5 (sum of the result including PM0.5, PM1 and PM2.5) and PM10, and specific substances: ammonia (NH3): 0-100ppm, hydrogen chloride (HCL): 0-30 ppm, formaldehyde (HCHO): 0-5 ppm

26. Is the oxygen sensor compatible with Atmon?
Yes, it is available on special request. If you are looking for other sensors that are not on the list of Atmon FL sensors - send us a message. Perhaps such sensors will also be available on special request.

27. Can the FL Atmonas can work in the rain?
In case of rainfall from above and from a slight incline, the Atmon can be used. We assume that in case of precipitation the maximum wind can be up to 5 m/s. Note: Yuneec drone H520 cannot be used in any precipitation.

28. What does the result file with the saved data from the Atmon look like and what data does it contain?
The files saved by the Atmon FL Ground Unit are in CSV form so they can be imported into many different programs for further analysis and processing. The simplest form is to import into a Microsoft Excell or Open Office Calc worksheet. The following data is available:
Date and time (as a unix timestamp)
Latitude and longitude
Height
RSSI (signal strength)
Battery charge level
Identification number
Device status
Measurement results from individual sensors
Air temperature
Humidity

29. What substances are recommended for detecting the incineration of illegal waste in domestic furnaces and why?
It should be remembered that these are not clear-cut issues, because different substances will separate many different gases when they are incinerated. The multitude of types of rubbish is obvious, but some legal fuels can also burn 'on dirty'.
We have three main groups of waste on which we focus:
  • Wood/furniture waste: materials such as MDF, plywood etc. contain organic adhesives, but the biggest problem with them is that they are preserved/impregnated with formaldehyde, which is very harmful and at the same time rarely found in legal fuels. It is one of the best, most unambiguous markers for burning illegal fuels, but of course it only concerns certain types of waste.
  • Rubber waste: sulphur is used in vulcanisation - it is one of the key components of rubber products that determines its properties. We can expect a lot of sulphur oxides, a little bit of hydrogen sulfide, and a little bit of formaldehyde when burning. We can also expect a lot of soot and a relatively high amount of "thicker" suspended dust.
  • Plastics, etc.: there are a lot of types of these substances. The worst are polyvinyl chloride, or PVC / PVC. We can expect them to detect large amounts of hydrogen chloride, but also carbon monoxide (to a lesser extent). The bottles are often made of polyethylene, which is relatively harmless. Interesting fact: In Switzerland, burning of polyethylene bottles is legal provided that the nut and nut ring are removed beforehand, as these are often made of PVC. During combustion, polyethylene breaks down into ethylene, which is flammable and burns mostly in the fireplace.
Division by substance/sensor:
  • HCL hydrogen chloride: will facilitate the detection of the combustion of plastics (mainly PVC), objects containing metal parts, materials containing dyes. HCL is very harmful. One of the most important sensors to detect illegal waste incineration.
  • Formaldehyde HCHO: will appear when furniture products are burned, because materials (cellulose) and organic adhesives are used, which are preserved by formaldehyde (specifically formaldehyde, a water-based solution). It may also appear when burning rubber, plastics and foil nets. One of the most important sensors for detecting illegal waste incineration. Its appearance is rather an unambiguous and certain indicator that something that was impregnated was burned.
  • Hydrogen sulphide H2S: may appear when certain plastics and rubber are burned. It is recommended by the Central European Drones Demonstrator (probably in terms of the so-called Door Directive and industrial/agricultural/waste water treatment plants - odour pollutants). Hydrogen sulfide is dangerous only in high concentrations, but the human nose, although it is very sensitive to hydrogen sulfide (comparable to sensors), in contrast to sensors - it gets used to it quickly, which can lead to dangerous concentrations being ignored.
  • Sulphur oxides SO, SO2: will occur in larger quantities when burning rubber, it can also occur when burning plastics, as well as solid fuels, oils, coal, biomass.
  • Carbon monoxide CO: may be an additional indicator, but it will say little in itself about burning waste. The combustion of legal fuels can also generate more CO if the combustion is incomplete (e.g. due to oxygen deficiency).
  • PM: these occur with every combustion. The leap in the PM readings is useful for determining that the device is taking smoke.
  • Ammonia NH3: this substance is recommended by the Drones Demonstrator probably for "stone-induced" pollution / more industrial or agricultural pollution. Ammonia is usually formed by the breakdown of protein substances by bacteria.
  • Hydrogen cyanide HCN - is formed when burning plastics and is also present in cigarette smoke.
  • Molecular chlorine Cl2 - is formed during the combustion of plastics. An average waste can emit a mixture of different substances. For example, burning a PC keyboard will produce a lot of gases, but hydrogen chloride may be dominant because of the PVC housing. Many packages such as juice cartons are made of several different materials, so they will also emit a whole set of poisonous substances when burned.

30. What transmission frequencies does the Atmon use and what is the power of its transmitter?
The frequencies in the ISM band: 433.05-434.79 MHz, power: 10mW e.r.p.



YUNEEC H520 NANOSENS ATMON FL




31. What is the maximum number of sensors?
If we use a PM sensor (PM 2,5 and PM10), we can choose 4 more gas sensors in addition to it. If you do not use PM2.5 and PM10 we can use up to 6 gas sensors.

32. Which tablet or computer is currently recommended to work with ATMON?
Any one based on Windows 7-8-10 and has a USB port. Compatibility with devices based on the Android system is planned for the third quarter of 2020 (due to the ongoing pandemic the date may change).

33. Are the sensors in Atmon interchangeable? Can you replace them yourself?
Yes, depending on the situation, the user can choose the sensors so that they best meet the requirements of the situation. This is particularly important, for example, for chemical emergency services, which can select a set of sensors to quickly adapt their Atmon to the intervention. The exchange is fast and can take place during the action, in between flights.
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