Libelium released a particulates
Gases PRO Sensor Board in May 2015. This platform features precision sensors to enable the implementation of urban monitoring, air quality, industrial, environmental or farming projects with high requirements in terms of accuracy, reliability, and measurement range. The new gas sensors line is available for both
Waspmote OEM and
Plug & Sense!.
Two different Sensor Boards are available to monitor and measure gas levels: Gases Sensor Board
(Gases) and Gases PRO Sensor Board
(Gases PRO).
Gases PRO Sensor Board for Waspmote OEM
Comparative Gases and Gases PRO Sensor Boards:
- A number of sensors: Gases PRO integrates 16 different gas sensors. The original Gases board integrates 12. See the complete list of parameters in the tables below.
- Increased accuracy: Gases PRO measures exact values of gas concentration in ppms. The Gases board shows a range of concentration low / medium / high. Details of the accuracy ranges figure in the tables below.
- Precision sensors: A sensitive new particulate matter sensor—commonly known as dust sensor—is included in the Gases PRO board. This sensor allows the measurement of PM1, PM2.5, and PM10 particles and comes calibrated from the factory.
Should I choose Gases, Gases PRO, or the New Air Quality Station?
Libelium has created different systems in terms of accuracy and pricing:
In terms of accuracy, this is probably the best IoT product developed in the Air market for cities and industries. The coefficient of determination (R²) measures a comparison between an
air quality device and another taken as a reference. You can discover the
test & results obtained during the installations where the Air Quality Station has been developed.
- The customer should consider particulates Gases PRO if she needs maximum performance sensors for metering that require accurate ppm or percentage. If the project just needs to detect gas presence or gas levels, the standard Gases Sensor Board is sufficient.
The new
Gases PRO Sensor Board can read up to 16 gas sensors; it also has a high-end sensor for three parameters:
temperature, humidity and pressure.
| Gases PRO [New Version] |
| Parameter |
Range |
Accuracy * |
| Temperature |
-40 to +85 ºC |
Calibrated
±1 ºC
(±0.5 ºC at 25 ºC) |
| Humidity |
0 to 100% HR |
Calibrated
±3% RH (at 25 ºC, range 20 ~ 80% RH) |
| Pressure |
30 to 110 kPa |
Calibrated
±0.1 kPa (range 0 ~ 65 ºC) |
| Carbon Monoxide for high concentrations
CO |
0 to 500 ppm |
Calibrated
±1 ppm |
| Carbon Monoxide for low concentrations
CO |
0 to 25 ppm |
Calibrated
±0.1 ppm |
| Carbon Dioxide
CO2 |
0 to 5000 ppm |
Calibrated
±50 ppm (range 0~2500 ppm)
±200 ppm (range 2500~5000 ppm) |
| Molecular Oxygen
O2 |
0 to 30% |
Calibrated
±0.1% |
| Ozone
O3 |
0 to 18 ppm |
Calibrated
±0.2 ppm |
| Nitric Oxide for low concentrations
NO |
0 to 20 ppm |
Calibrated
±0.2 ppm |
| Nitric Dioxide high accuracy
NO2 |
0 to 20 ppm |
Calibrated
±0.1 ppm |
| Sulfur Dioxide high accuracy
SO2 |
0 to 20 ppm |
Calibrated
±0.1 ppm |
| Ammonia for low concentrations
NH3 |
0 to 100 ppm |
Calibrated
±0.5 ppm |
| Ammonia for high concentrations
NH3 |
0 to 500 ppm |
Calibrated
±3 ppm |
| Methane and other combustible gases
CH4 |
0 to 100 % / LEL |
Calibrated
±0.15 % LEL |
| Molecular Hydrogen
H2 |
0 to 1000 |
Calibrated
±10 ppm |
| Hydrogen Sulfide
H2S |
0 to 100 ppm |
Calibrated
±0.1 ppm |
| Hydrogen Chloride
HCl |
0 to 50 ppm |
Calibrated
±1 ppm |
| Hydrogen Cyanide
HCN |
0 to 50 ppm |
Calibrated
±0.2 ppm |
| Phosphine
PH3 |
0 to 20 ppm |
Calibrated
±0.1 ppm |
| Ethylene Oxide
ETO |
0 to 100 ppm |
Calibrated
±1 ppm |
| Chlorine
Cl2 |
0 to 50 ppm |
Calibrated
±0.1 ppm |
| Particle Matter – Dust |
0.5 to 16 μm
(16 steps) (includes PM1, PM2.5 and PM10) |
Calibrated |
* Accuracy values have been calculated at average conditions: 20ºC / 101300 Pa. Accuracy levels may differ with different temperature and pressure levels, aging and in presence of third type of gases which cause cross sensitivity. See each Gas Sensor documentation for more information.
| Gases v2.0 [Old Version] |
| Parameter |
Range |
Accuracy * |
| Temperature |
40 to +125 ºC |
Not calibrated
±2 ºC (range 0 ~ 70 ºC), ±4 ºC (range -40 ~ 125 ºC) |
| Humidity |
0 to 100% HR |
Not calibrated
<±4% RH (at 25 ºC, range 30 ~ 80% RH),
<±6% RH (range 0 ~ 100% RH) |
| Pressure |
15 to 115 kPa |
Not calibrated
<±1.5% V (range 0 ~ 85 ºC) |
| Carbon Monoxide
CO |
30 to 1000 ppm |
Not calibrated |
| Carbon Dioxide
CO2 |
350 to 10000 ppm |
Not calibrated |
| Molecular Oxygen
O2 |
0 to 30% |
Not calibrated |
| Ozone
O3 |
0.010 to 1 ppm |
Not calibrated |
| Nitric Dioxide
NO2 |
0.05 to 5 ppm |
Not calibrated |
| Ammonia
NH3 |
10 to 100 ppm |
Not calibrated |
| Methane and other combustible gases
CH4 |
500 to 10000 ppm |
Not calibrated |
| Molecular Hydrogen
H2 |
500 to 10000 ppm |
Not calibrated |
| Hydrogen Sulfide
H2S |
0.1 to 3 ppm |
Not calibrated |
| Isobutane
C4H10 |
50 to 5000 ppm |
Not calibrated |
| Ethanol
CH3CH2OH |
1 to 30 ppm
50 to 5000 ppm |
Not calibrated |
| Toluene
C6H5CH3 |
1 to 30 ppm |
Not calibrated |
| Volatile Organic Compounds |
30 to 400 ppm |
Not calibrated |
| Hydrocarbons |
– |
Not calibrated |
How are the Gases PRO sensors calibrated?
All the Gases PRO sensors are linear, so they behave according to a simple line like y = f(x) = m·x + c. On the other hand, the Gases Sensor Board sensors show a logarithmic response, which is harder to handle.
All the gas sensors for Gases PRO are calibrated by the sensor manufacturers, in laboratories. To obtain maximum accuracy, a two-point calibration process is performed on controlled concentrations of gas in vacuum chambers. Due to the linear nature of the sensors, these two points are enough to correct the two possible drifts in m (slope) and c (constant offset). Our sensor manufacturers provide a calibration certificate for each individual sensor, with two calibration parameters. Libelium stores these parameters in an EEPROM, a non-volatile memory chip inside each gas sensor. When the user performs a sensor reading, the software system designed by Libelium reads the sensor signal and the two parameters. These three values are processed by the system, and a temperature compensation calculation is applied. From this data we obtain the concentration value in ppms – the value we want to measure.
The new Temperature, Humidity and Pressure sensor for Gases PRO is calibrated in the factory. It comes with three calibration points for temperature, six points for humidity and nine points for pressure. These three parameters are automatically inter-compensated to obtain extreme accuracy.
Plug & Sense! Smart Environment PRO including new Gases PRO Sensor Board
Gases PRO Sensor Board is included in Libelium’s new Smart Cities sensing solution, Plug & Sense! Smart Environment PRO. This board also allows obtaining information about particle size and density ranging from 1um to 10um (PM1 / PM2.5 / PM10) in its surroundings, using the new particulate matter sensor—commonly known as dust sensor.
For more Technical information go to
Waspmote and
Plug & Sense! website, and to the
Gases PRO Sensor Board.
If you are interested in purchase information please contact the
Libelium Commercial Department.
